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GeezerVison is showing github.com — BACnetServerExamplePython/BACnetServerExample.py at master · chipkin/BACnetServerExamplePython Expand file tree/ Copy pathBACnetServerExample.pyMore file actions 921 lines (764 loc) · 47.3 KB / Copy pathBACnetServerExample.pyFile metadata and controls921 lines (764 loc) · 47.3 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 # CAS BACnet Stack Python Server Example # https://github.com/chipkin/BACnetServerExamplePython # import BACnetServerExampleDatabase as db_module import ctypes import logging import os import pathlib import sys import netifaces import dns.resolver # Package name: dnspython import socket import time # Sleep function # Contains all the Enumerations, and callback prototypes from CASBACnetStackAdapter import * # Globals # ----------------------------------------------------------------------------- udpSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) lastTimeValueWasUpdated = 0 BACnetDatabase = db_module.ExampleDatabase() # Configure logging logging.basicConfig( level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s', datefmt='%Y-%m-%d %H:%M:%S' ) logger = logging.getLogger(__name__) # Example database # ------------------------------------------------------------------------------------------------- # This is an example database. Normally this data would come from your # sensor/database DEVICE_INSTANCE = 389001 ANALOG_INPUT_BRONZE_INSTANCE = 0 ANALOG_OUTPUT_CHARTREUSE_INSTANCE = 1 ANALOG_VALUE_DIAMOND_INSTANCE = 2 BINARY_INPUT_EMERALD_INSTANCE = 3 BINARY_OUTPUT_FUCHSIA_INSTANCE = 4 BINARY_VALUE_GOLD_INSTANCE = 5 MULTISTATE_INPUT_HOTPINK_INSTANCE = 13 MULTISTATE_OUTPUT_INDIGO_INSTANCE = 14 MULTISTATE_VALUE_KIWI_INSTANCE = 15 CHARACTERSTRING_VALUE_NICKEL_INSTANCE = 40 INTEGER_VALUE_PURPLE_INSTANCE = 45 LARGE_ANALOG_VALUE_QUARTZ_INSTANCE = 46 POSITIVE_INTEGER_VALUE_SILVER_INSTANCE = 48 NETWORK_PORT_VERMILLION_INSTANCE = 56 MAX_BACNET_PRIORITY = 16 BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["device"], DEVICE_INSTANCE, bacnet_propertyIdentifier["objectname"], "Device Rainbow") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["device"], DEVICE_INSTANCE, bacnet_propertyIdentifier["vendorname"], "Example Chipkin Automation Systems") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["device"], DEVICE_INSTANCE, bacnet_propertyIdentifier["vendoridentifier"], 0) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["analogInput"], ANALOG_INPUT_BRONZE_INSTANCE, bacnet_propertyIdentifier["objectname"], "AnalogInput Bronze") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["analogInput"], ANALOG_INPUT_BRONZE_INSTANCE, bacnet_propertyIdentifier["presentvalue"], 99.6) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["analogInput"], ANALOG_INPUT_BRONZE_INSTANCE, bacnet_propertyIdentifier["units"], bacnet_engineeringUnits["degreescelsius"]) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["binaryInput"], BINARY_INPUT_EMERALD_INSTANCE, bacnet_propertyIdentifier["objectname"], "BinaryInput Emerald") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["binaryInput"], BINARY_INPUT_EMERALD_INSTANCE, bacnet_propertyIdentifier["presentvalue"], 1) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["multiStateInput"], MULTISTATE_INPUT_HOTPINK_INSTANCE, bacnet_propertyIdentifier["objectname"], "MultiStateInput Hot Pink") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["multiStateInput"], MULTISTATE_INPUT_HOTPINK_INSTANCE, bacnet_propertyIdentifier["presentvalue"], 3) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["analogOutput"], ANALOG_OUTPUT_CHARTREUSE_INSTANCE, bacnet_propertyIdentifier["objectname"], "AnalogOutput Chartreuse") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["analogOutput"], ANALOG_OUTPUT_CHARTREUSE_INSTANCE, bacnet_propertyIdentifier["relinquishdefault"], "0.0") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["analogOutput"], ANALOG_OUTPUT_CHARTREUSE_INSTANCE, bacnet_propertyIdentifier["priorityarray"], [None] * MAX_BACNET_PRIORITY) # Set one of the priority array elements BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["analogOutput"], ANALOG_OUTPUT_CHARTREUSE_INSTANCE, bacnet_propertyIdentifier["priorityarray"], "1.11",True, 14) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["analogValue"], ANALOG_VALUE_DIAMOND_INSTANCE, bacnet_propertyIdentifier["objectname"], "AnalogValue Diamond") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["analogValue"], ANALOG_VALUE_DIAMOND_INSTANCE, bacnet_propertyIdentifier["presentvalue"], 1) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["binaryOutput"], BINARY_OUTPUT_FUCHSIA_INSTANCE, bacnet_propertyIdentifier["objectname"], "BinaryOutput Fuchsia") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["binaryOutput"], BINARY_OUTPUT_FUCHSIA_INSTANCE, bacnet_propertyIdentifier["priorityarray"], [None] * MAX_BACNET_PRIORITY) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["binaryOutput"], BINARY_OUTPUT_FUCHSIA_INSTANCE, bacnet_propertyIdentifier["relinquishdefault"], 1) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["binaryValue"], BINARY_VALUE_GOLD_INSTANCE, bacnet_propertyIdentifier["objectname"], "BinaryValue Gold") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["binaryValue"], BINARY_VALUE_GOLD_INSTANCE, bacnet_propertyIdentifier["presentvalue"], 1) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["multiStateOutput"], MULTISTATE_OUTPUT_INDIGO_INSTANCE, bacnet_propertyIdentifier["objectname"], "MultiStateOutput Indigo") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["multiStateOutput"], MULTISTATE_OUTPUT_INDIGO_INSTANCE, bacnet_propertyIdentifier["priorityarray"], [None] * MAX_BACNET_PRIORITY) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["multiStateOutput"], MULTISTATE_OUTPUT_INDIGO_INSTANCE, bacnet_propertyIdentifier["relinquishdefault"], 1) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["multiStateValue"], MULTISTATE_VALUE_KIWI_INSTANCE, bacnet_propertyIdentifier["objectname"], "MultiStateValue Kiwi") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["multiStateValue"], MULTISTATE_VALUE_KIWI_INSTANCE, bacnet_propertyIdentifier["presentvalue"], 1) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["characterstringValue"], CHARACTERSTRING_VALUE_NICKEL_INSTANCE, bacnet_propertyIdentifier["objectname"], "CharacterstringValue Nickel") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["characterstringValue"], CHARACTERSTRING_VALUE_NICKEL_INSTANCE, bacnet_propertyIdentifier["presentvalue"], "hello world") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["integerValue"], INTEGER_VALUE_PURPLE_INSTANCE, bacnet_propertyIdentifier["objectname"], "IntegerValue Purple") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["integerValue"], INTEGER_VALUE_PURPLE_INSTANCE, bacnet_propertyIdentifier["presentvalue"], 1) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["largeAnalogValue"], LARGE_ANALOG_VALUE_QUARTZ_INSTANCE, bacnet_propertyIdentifier["objectname"], "LargeAnalogValue Quartz") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["largeAnalogValue"], LARGE_ANALOG_VALUE_QUARTZ_INSTANCE, bacnet_propertyIdentifier["presentvalue"], 1) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["positiveIntegerValue"], POSITIVE_INTEGER_VALUE_SILVER_INSTANCE, bacnet_propertyIdentifier["objectname"], "PositiveIntegerValue Silver") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["positiveIntegerValue"], POSITIVE_INTEGER_VALUE_SILVER_INSTANCE, bacnet_propertyIdentifier["presentvalue"], 1) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["objectname"], "NetworkPort Vermillion") BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["bacnetipudpport"], 47808) BACnetDatabase.Save('db.json') def octetStringCopy(source, destination, length, offset=0): for i in range(length): destination[i + offset] = source[i] # Rebuilds string from ctype.c_uint_8 arrray def rebuildString(strPointer, length): rebuiltStr = "" for i in range(0, length): rebuiltStr = rebuiltStr + chr(strPointer[i]) return rebuiltStr def ValueToKey(enumeration, searchValue): # https://www.geeksforgeeks.org/python-get-key-from-value-in-dictionary/ for key, value in enumeration.items(): if value == searchValue: return key return "key doesn't exist" # Callbacks # ----------------------------------------------------------------------------- def CallbackReceiveMessage(message, maxMessageLength, receivedConnectionString, maxConnectionStringLength, receivedConnectionStringLength, networkType): try: data, addr = udpSocket.recvfrom(maxMessageLength) # if not data: # logger.debug("not data") # A message was received. logger.debug( "CallbackReceiveMessage. Message Received %s %s %s", addr, data, len(data)) # Convert the received address to the CAS BACnet Stack connection string format. ip_as_bytes = bytes(map(int, addr[0].split("."))) for i in range(len(ip_as_bytes)): receivedConnectionString[i] = ip_as_bytes[i] # UDP Port receivedConnectionString[4] = int(addr[1] / 256) receivedConnectionString[5] = addr[1] % 256 # New ConnectionString Length receivedConnectionStringLength[0] = 6 # Convert the received data to a format that CAS BACnet Stack can process. for i in range(len(data)): message[i] = data[i] # Set the network type networkType[0] = ctypes.c_uint8(casbacnetstack_networkType["ip"]) return len(data) except BlockingIOError: # No message, We are not waiting for a incoming message so our socket returns a BlockingIOError. This is normal. return 0 # Catch all return 0 def CallbackSendMessage(message, messageLength, connectionString, connectionStringLength, networkType, broadcast): # Currently we are only supporting IP if networkType != casbacnetstack_networkType["ip"]: logger.error("Unsupported network type. networkType: %s", networkType) return 0 # Extract the Connection String from CAS BACnet Stack into an IP address and port. udpPort = connectionString[4] * 256 + connectionString[5] ipAddress = f"{connectionString[0]:.0f}.{connectionString[1]:.0f}." f"{connectionString[2]:.0f}.{connectionString[3]:.0f}" if broadcast: # Use broadcast IP address ipAddress_list = GetBroadcastIPAddress() if ipAddress_list: ipAddress = f"{ipAddress_list[0]}.{ipAddress_list[1]}.{ipAddress_list[2]}.{ipAddress_list[3]}" logger.debug("Broadcast this message. Broadcast IP: %s", ipAddress) # Extract the message from CAS BACnet Stack to a bytearray data = bytearray(messageLength) for i in range(len(data)): data[i] = message[i] # Send the message udpSocket.sendto(data, (ipAddress, udpPort)) return messageLength def GetBroadcastIPAddress(): ipaddress = BACnetDatabase.Get(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["ipaddress"]) ipsubnetmask = BACnetDatabase.Get(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["ipsubnetmask"]) if ipaddress is None or ipsubnetmask is None: logger.error("Failed to get IP address or subnet mask.") return None # The broadcast address is the IP address OR ipsubnetmask # IP Address: [169, 254, 83, 107], Subnet Mask: [255, 255, 0, 0] # Inverted mask: [0, 0, 255, 255], then OR with IP broadcast_address = [ipaddress[i] | ((~ipsubnetmask[i]) & 0xFF) for i in range(4)] # logger.debug("IP Address: %s, Subnet Mask: %s, Broadcast Address: %s", ipaddress, ipsubnetmask, broadcast_address) return broadcast_address def CallbackGetSystemTime(): return int(time.time()) def CallbackGetPropertyReal(deviceInstance, objectType, objectInstance, propertyIdentifier, value, useArrayIndex, propertyArrayIndex): logger.debug("CallbackGetPropertyReal deviceInstance=%s objectType=%s objectInstance=%s propertyIdentifier=%s useArrayIndex=%s propertyArrayIndex=%s", deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) raw_value = BACnetDatabase.Get( deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) if raw_value is None: logger.debug("Value not found in database. PropertyIdentifier: %s (%s)", ValueToKey(bacnet_propertyIdentifier, propertyIdentifier), propertyIdentifier) return False value[0] = ctypes.c_float(float(raw_value)) return True def CallbackGetPropertyCharString(deviceInstance, objectType, objectInstance, propertyIdentifier, value, valueElementCount, maxElementCount, encodingType, useArrayIndex, propertyArrayIndex): logger.debug("CallbackGetPropertyCharString deviceInstance=%s objectType=%s objectInstance=%s propertyIdentifier=%s useArrayIndex=%s propertyArrayIndex=%s", deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) raw_value = BACnetDatabase.Get( deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) if raw_value is None: logger.debug("Value not found in database. PropertyIdentifier: %s (%s)", ValueToKey(bacnet_propertyIdentifier, propertyIdentifier), propertyIdentifier) return False raw_value_encoded = raw_value.encode("utf-8") for i in range(len(raw_value_encoded)): value[i] = raw_value_encoded[i] valueElementCount[0] = len(raw_value_encoded) return True def CallbackGetPropertyEnumerated(deviceInstance, objectType, objectInstance, propertyIdentifier, value, useArrayIndex, propertyArrayIndex): logger.debug("CallbackGetPropertyEnumerated deviceInstance=%s objectType=%s objectInstance=%s propertyIdentifier=%s useArrayIndex=%s propertyArrayIndex=%s", deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) raw_value = BACnetDatabase.Get( deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) if raw_value is None: logger.debug("Value not found in database. PropertyIdentifier: %s (%s)", ValueToKey(bacnet_propertyIdentifier, propertyIdentifier), propertyIdentifier) return False if propertyIdentifier == bacnet_propertyIdentifier["fdbbmdaddress"]: value[0] = ctypes.c_uint32(int(1)) # 0 = None, 1 = IpAddress, 2 = Name return True value[0] = ctypes.c_uint32(int(raw_value)) return True def CallbackGetPropertyBitString(deviceInstance, objectType, objectInstance, propertyIdentifier, value, valueElementCount, maxElementCount, useArrayIndex, propertyArrayIndex): logger.debug("CallbackGetPropertyBitString deviceInstance=%s objectType=%s objectInstance=%s propertyIdentifier=%s useArrayIndex=%s propertyArrayIndex=%s", deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) return False def CallbackGetPropertyBool(deviceInstance, objectType, objectInstance, propertyIdentifier, value, useArrayIndex, propertyArrayIndex): logger.debug("CallbackGetPropertyBool deviceInstance=%s objectType=%s objectInstance=%s propertyIdentifier=%s useArrayIndex=%s propertyArrayIndex=%s", deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) raw_value = BACnetDatabase.Get( deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) if raw_value is None: logger.debug("Value not found in database. PropertyIdentifier: %s (%s)", ValueToKey(bacnet_propertyIdentifier, propertyIdentifier), propertyIdentifier) return False # priorityarray is unique. What we are asking here is if # the value at the offset isNull. if useArrayIndex == True and propertyArrayIndex > 0 and propertyIdentifier == bacnet_propertyIdentifier["priorityarray"]: if raw_value == "None": # This indicates that the priority is not set value[0] = True return True else: # This indicates that the priority is set as it has a value value[0] = False return True value[0] = bool(raw_value) return True def CallbackGetPropertyDate(deviceInstance, objectType, objectInstance, propertyIdentifier, year, month, day, weekday, useArrayIndex, propertyArrayIndex): logger.debug("CallbackGetPropertyDate deviceInstance=%s objectType=%s objectInstance=%s propertyIdentifier=%s useArrayIndex=%s propertyArrayIndex=%s", deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) return False def CallbackGetPropertyDouble(deviceInstance, objectType, objectInstance, propertyIdentifier, value, useArrayIndex, propertyArrayIndex): logger.debug("CallbackGetPropertyDouble deviceInstance=%s objectType=%s objectInstance=%s propertyIdentifier=%s useArrayIndex=%s propertyArrayIndex=%s", deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) raw_value = BACnetDatabase.Get( deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) if raw_value is None: logger.debug("Value not found in database. PropertyIdentifier: %s (%s)", ValueToKey(bacnet_propertyIdentifier, propertyIdentifier), propertyIdentifier) return False value[0] = ctypes.c_double(float(raw_value)) return True def CallbackGetPropertyOctetString(deviceInstance, objectType, objectInstance, propertyIdentifier, value, valueElementCount, maxElementCount, useArrayIndex, propertyArrayIndex): logger.debug("CallbackGetPropertyOctetString deviceInstance=%s objectType=%s objectInstance=%s propertyIdentifier=%s useArrayIndex=%s propertyArrayIndex=%s", deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) SIZE_OF_IP_ADDRESS = 4 if objectType == bacnet_objectType["networkPort"] and objectInstance == NETWORK_PORT_VERMILLION_INSTANCE: if propertyIdentifier == bacnet_propertyIdentifier["ipaddress"]: ip_addr = BACnetDatabase.Get( deviceInstance, objectType, objectInstance, bacnet_propertyIdentifier["ipaddress"]) if ip_addr is not None: valueElementCount[0] = int(SIZE_OF_IP_ADDRESS) octetStringCopy(ip_addr, value, int(SIZE_OF_IP_ADDRESS)) logger.debug("IN GET IP: output = %s.%s.%s.%s", value[0], value[1], value[2], value[3]) return True elif propertyIdentifier == bacnet_propertyIdentifier["ipdefaultgateway"]: ip_default_gateway = BACnetDatabase.Get( deviceInstance, objectType, objectInstance, bacnet_propertyIdentifier["ipdefaultgateway"]) if ip_default_gateway is not None: valueElementCount[0] = int(SIZE_OF_IP_ADDRESS) octetStringCopy(ip_default_gateway, value, int(SIZE_OF_IP_ADDRESS)) return True elif propertyIdentifier == bacnet_propertyIdentifier["ipsubnetmask"]: ip_subnet_mask = BACnetDatabase.Get( deviceInstance, objectType, objectInstance, bacnet_propertyIdentifier["ipsubnetmask"]) if ip_subnet_mask is not None: valueElementCount[0] = int(SIZE_OF_IP_ADDRESS) octetStringCopy(ip_subnet_mask, value, int(SIZE_OF_IP_ADDRESS)) return True elif propertyIdentifier == bacnet_propertyIdentifier["ipdnsserver"]: ip_dns_server = BACnetDatabase.Get( deviceInstance, objectType, objectInstance, bacnet_propertyIdentifier["ipdnsserver"]) logger.debug("IP DNS Server: %s, ip_dns_server_size=%d", ip_dns_server, len(ip_dns_server)) logger.debug("\n\n\n\n") # Example: [[1, 1, 1, 1], [192, 168, 3, 1]] # There are two DNS servers # We need to copy each DNS server's IP address into the value array if ip_dns_server is not None: for i in range(len(ip_dns_server)): logger.debug("Copying DNS server %d: %s", i, ip_dns_server[i]) octetStringCopy(ip_dns_server[i], value, SIZE_OF_IP_ADDRESS, i * SIZE_OF_IP_ADDRESS) return True elif propertyIdentifier == bacnet_propertyIdentifier["fdbbmdaddress"]: fdbbmd_address_host_ip = BACnetDatabase.Get( deviceInstance, objectType, objectInstance, bacnet_propertyIdentifier["fdbbmdaddress"]) if fdbbmd_address_host_ip is not None: valueElementCount[0] = int(SIZE_OF_IP_ADDRESS) octetStringCopy(fdbbmd_address_host_ip, value, int(SIZE_OF_IP_ADDRESS)) return True return False def CallbackGetPropertyInt(deviceInstance, objectType, objectInstance, propertyIdentifier, value, useArrayIndex, propertyArrayIndex): logger.debug("CallbackGetPropertyInt deviceInstance=%s objectType=%s objectInstance=%s propertyIdentifier=%s useArrayIndex=%s propertyArrayIndex=%s", deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) raw_value = BACnetDatabase.Get( deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) if raw_value is None: logger.debug("Value not found in database. PropertyIdentifier: %s (%s)", ValueToKey(bacnet_propertyIdentifier, propertyIdentifier), propertyIdentifier) return False value[0] = ctypes.c_int32(int(raw_value)) return True def CallbackGetPropertyTime(deviceInstance, objectType, objectInstance, propertyIdentifier, hour, minute, second, hundrethSeconds, useArrayIndex, propertyArrayIndex): logger.debug("CallbackGetPropertyTime deviceInstance=%s objectType=%s objectInstance=%s propertyIdentifier=%s useArrayIndex=%s propertyArrayIndex=%s", deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) return False def CallbackGetPropertyUInt(deviceInstance, objectType, objectInstance, propertyIdentifier, value, useArrayIndex, propertyArrayIndex): logger.debug("CallbackGetPropertyUInt deviceInstance=%s objectType=%s objectInstance=%s propertyIdentifier=%s useArrayIndex=%s propertyArrayIndex=%s", deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) raw_value = BACnetDatabase.Get( deviceInstance, objectType, objectInstance, propertyIdentifier, useArrayIndex, propertyArrayIndex) if raw_value is None: logger.debug("Value not found in database. PropertyIdentifier: %s (%s)", ValueToKey(bacnet_propertyIdentifier, propertyIdentifier), propertyIdentifier) return False value[0] = ctypes.c_uint32(int(raw_value)) return True def CallbackSetPropertyUInt(deviceInstance, objectType, objectInstance, propertyIdentifier, value, useArrayIndex, propertyArrayIndex, priority, errorCode): logger.debug("CallbackSetPropertyUInt %s %s %s %s %s %s %s %s %s", deviceInstance, objectType, objectInstance, propertyIdentifier, value, useArrayIndex, propertyArrayIndex, priority, errorCode) return BACnetDatabase.Set(deviceInstance, objectType, deviceInstance, propertyIdentifier, value) def CallbackSetPropertyOctetString(deviceInstance, objectType, objectInstance, propertyIdentifier, value, length, useArrayIndex, propertyArray, priority, errorCode): logger.debug("CallbackSetPropertyOctetString %s %s %s %s %s %s %s %s %s %s", deviceInstance, objectType, objectInstance, propertyIdentifier, value, length, useArrayIndex, propertyArray, priority, errorCode) if deviceInstance == int(BACnetDatabase.Get(deviceInstance, bacnet_objectType["device"], deviceInstance, bacnet_propertyIdentifier["instance"])): if propertyIdentifier == bacnet_propertyIdentifier["fdbbmdaddress"]: if objectType == bacnet_objectType["networkPort"] and objectInstance == NETWORK_PORT_VERMILLION_INSTANCE: BACnetDatabase.Set(deviceInstance, objectType, objectInstance, "FdBbmdAddressHostIp", [ value[0], value[1], value[2], value[3]]) BACnetDatabase.Set(deviceInstance, objectType, objectInstance, "changesPending", False) return True return False def CallbackReinitializeDevice(deviceInstance, reinitializedState, password, passwordLength, errorCode): # Rebuild password from pointer reference derefedPassword = rebuildString(password, passwordLength) logger.debug("CallbackReinitializeDevice %s %s %s %s %s", deviceInstance, reinitializedState, derefedPassword, passwordLength, errorCode[0]) # This callback is called when this BACnet Server device receives a ReinitializeDevice message # In this callback, you will handle the reinitializedState # If reinitializedState = ACTIVATE_CHANGES (7) then you will apply any network port changes and store the values in # non-volatile memory # If reinitializedState = WARM_START(1) then you will apply any network port changes, store the values in # non-volatile memory, and restart the device # Before handling the reinitializedState, first check the password. # If your device does not require a password, then ignore any password passed in. # Otherwise, validate the password. # If password invalid, missing, or incorrect: set errorCode to PasswordInvalid (26) # In this example, a password of 12345 is required # Check password before handling reinitialization if passwordLength == 0 or derefedPassword != "12345": errorCode[0] = bacnet_errorCode["password-failure"] return False # In this example, only the NetworkPort Object FdBbmdAddress and FdSubscriptionLifetime properties are writable and # need to be stored in non-volatile memory. For the purpose of this example, we will not storing these values in # non-volatile memory. # 1. Store values that must be stored in non-volatile memory (i.e. must survive a reboot) # 2. Apply any Network Port values that have been written to # If any validation on the Network Port values fails, set errorCode to INVALID_CONFIGURATION_DATA (46) # 3. Set Network Port ChangesPending property to false # 4. Handle ReinitializedState. If ACTIVATE_CHANGES, no other action, return true # If WARM_START, prepare device for reboot, return true. and reboot # NOTE: Must return True first before rebooting so the stack sends the SimpleAck if reinitializedState == casbacnetstack_reinitializeState["state-activate-changes"]: db["networkPort"]["changesPending"] = False return True elif reinitializedState == casbacnetstack_reinitializeState["state-warm-start"]: # Flag for reboot and handle reboot after stack responds with SimpleAck db["networkPort"]["changesPending"] = False errorCode[0] = 2 return True else: # All other states are not supported in this example errorCode[0] = bacnet_errorCode["optional-functionality-not-supported"] return False def CallbackDeviceCommunicationControl(deviceInstance, enableDisable, password, passwordLength, useTimeDuration, timeDuration, errorCode): # Rebuild password from pointer reference derefedPassword = rebuildString(password, passwordLength) logger.debug("CallbackDeviceCommunicationControl %s %s %s %s %s %s %s", deviceInstance, enableDisable, derefedPassword, passwordLength, useTimeDuration, timeDuration, errorCode[0]) # This callback is called when this BACnet Server device receives a DeviceCommunicationControl message # In this callback, you will handle the password. All other parameters are purely for logging to know # what parameters the DeviceCommunicationControl request had # To handle the password: # If your device does not require a password, then ignore any password passed in # Otherwise, validate the password # If password invalid, missing, or incorrect: set errorCode to PasswordInvalid (26) # In this example, a password of 12345 is required # Check password if passwordLength == 0 or derefedPassword != "12345": errorCode[0] = bacnet_errorCode["password-failure"] return False # Return true to allow DeviceCommunicationControl logic to continue return True def CallbackLogDebugMessage(message, messageLength, messageType): # Rebuild message from pointer reference derefedMessage = rebuildString(message, messageLength) # logger.debug("CallbackLogDebugMessage %s %s %s", derefedMessage, messageLength, messageType) # # if derefedMessage != "" and messageLength != 0: # logger.debug("CAS BACnet Stack DEBUG MESSAGE: %s", derefedMessage) def AddAndConfigureNetworkPort(device_instance): logger.info("Adding networkPort. networkPort.instance=%s", NETWORK_PORT_VERMILLION_INSTANCE) if not CASBACnetStack.BACnetStack_AddNetworkPortObject( device_instance, NETWORK_PORT_VERMILLION_INSTANCE, casbacnetstack_networkType["ipv4"], casbacnetstack_protocolLevel["bacnet-application"], casbacnetstack_network_port_lowest_protocol_level ): logger.error("Failed to add networkPort") exit() # Get the primary ethernet interface (filter out virtual adapters) def get_primary_interface(): interfaces = netifaces.interfaces() logger.debug("Available interfaces: %s", interfaces) for interface in interfaces: # Skip common virtual interfaces interface_lower = interface.lower() if any(skip_name in interface_lower for skip_name in [ 'tailscale', 'loopback', 'vmware', 'virtualbox', 'vbox', 'docker', 'wsl', 'hyper-v', 'bluetooth', 'teredo' ]): logger.debug("Skipping virtual interface: %s", interface) continue # Check if interface has IPv4 address try: addrs = netifaces.ifaddresses(interface) if netifaces.AF_INET not in addrs: continue ipv4_info = addrs[netifaces.AF_INET][0] ip_addr = ipv4_info.get('addr') if not ip_addr: continue # Skip loopback addresses if ip_addr.startswith('127.'): continue # Skip Tailscale IP range (100.64.0.0/10) ip_parts = [int(x) for x in ip_addr.split('.')] if ip_parts[0] == 100 and 64 <= ip_parts[1] <= 127: logger.debug("Skipping Tailscale IP range: %s", ip_addr) continue # Skip other common virtual IP ranges if (ip_parts[0] == 169 and ip_parts[1] == 254): # APIPA logger.debug("Skipping APIPA address: %s", ip_addr) continue logger.info("Selected primary interface: %s with IP: %s", interface, ip_addr) return interface except Exception as e: logger.debug("Error checking interface %s: %s", interface, e) continue # Fallback to first available interface if no suitable one found logger.warning("No suitable primary interface found, using first available") return interfaces[0] if interfaces else None primary_interface = get_primary_interface() if not primary_interface: logger.error("No network interface available") exit() # Load network information from the primary interface try: interface_info = netifaces.ifaddresses(primary_interface) ipv4_info = interface_info[netifaces.AF_INET][0] ip_address = [int(octet) for octet in ipv4_info["addr"].split(".")] subnet_mask = [int(octet) for octet in ipv4_info["netmask"].split(".")] # Get default gateway default_gateway = [int(octet) for octet in netifaces.gateways()[ "default"][netifaces.AF_INET][0].split(".")] logger.info("Using interface: %s", primary_interface) logger.info("IP Address: %s", ".".join(map(str, ip_address))) logger.info("Subnet Mask: %s", ".".join(map(str, subnet_mask))) logger.info("Default Gateway: %s", ".".join(map(str, default_gateway))) except Exception as e: logger.error("Failed to get network information from interface %s: %s", primary_interface, e) exit() dnsServerOctetList = [] for dnsServer in dns.resolver.Resolver().nameservers: dnsServerOctetList.append([int(octet) for octet in dnsServer.split(".")]) logger.info("DNS Servers: %s", dnsServerOctetList) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["ipaddress"], ip_address) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["ipsubnetmask"], subnet_mask) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["ipdefaultgateway"], default_gateway) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["ipdnsserver"], dnsServerOctetList) BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["fdbbmdaddress"], [0,0,0,0]) logger.info("Local IP address: %s", ip_address) def SendIAmBroadcast(): ipAddress = GetBroadcastIPAddress() udpPort = int(BACnetDatabase.Get( DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["bacnetipudpport"])) if ipAddress is None or udpPort is None: logger.error( "Missing IP address or UDP port. Can not send I-AM broadcast") return logger.info("Sending I-AM broadcast ipAddress: %s, udpPort: %s", ipAddress, udpPort) # Convert the IP Address and UDP Port to a byte string that can be used by the CAS BACnet Stack addressString = (ctypes.c_uint8 * 6)() octetStringCopy(ipAddress, addressString, 4) addressString[4] = int(udpPort / 256) addressString[5] = int(udpPort % 256) if not CASBACnetStack.BACnetStack_SendIAm( ctypes.c_uint32(DEVICE_INSTANCE), ctypes.cast(addressString, ctypes.POINTER(ctypes.c_uint8)), ctypes.c_uint8(6), ctypes.c_uint8(casbacnetstack_networkType["ip"]), ctypes.c_bool(True), ctypes.c_uint16(65535), None, ctypes.c_uint8(0)): logger.error("Failed to send I-Am") def AddObjectsFromDatabase(objectList): for obj in objectList: objectType, objectInstance = obj if objectType == bacnet_objectType["device"] or objectType == bacnet_objectType["networkPort"]: # Network port object already added above continue # Add the object to the BACnet stack if not CASBACnetStack.BACnetStack_AddObject(DEVICE_INSTANCE, objectType, objectInstance): logger.error("Failed to add object. Type=%s Instance=%s", objectType, objectInstance) exit() # Print a message to the log # Look up the object type by the id in the bacnet_objectType dictionary if objectType in bacnet_objectType.values(): objectTypeName = [ name for name, value in bacnet_objectType.items() if value == objectType][0] logger.info("Added object. %s (%s)", objectTypeName, objectInstance) def ConnectToSocket(udp_port): logger.info("Connecting UDP Resource to port=%s", udp_port) HOST = "" # Symbolic name meaning all available interfaces udpSocket.bind((HOST, udp_port)) udpSocket.setblocking(False) def updateValues(): presentValue = float(BACnetDatabase.Get( DEVICE_INSTANCE, bacnet_objectType["analogInput"], ANALOG_INPUT_BRONZE_INSTANCE, bacnet_propertyIdentifier["presentvalue"])) presentValue += 0.1 BACnetDatabase.Set(DEVICE_INSTANCE, bacnet_objectType["analogInput"], ANALOG_INPUT_BRONZE_INSTANCE, bacnet_propertyIdentifier["presentvalue"], presentValue) # Notify the stack that this data point was updated so the stack can check for logic # that may need to run on the data. Example: check if COV (change of value) occurred. if CASBACnetStack.BACnetStack_ValueUpdated is not None: CASBACnetStack.BACnetStack_ValueUpdated( DEVICE_INSTANCE, bacnet_objectType["analogValue"], ANALOG_INPUT_BRONZE_INSTANCE, bacnet_propertyIdentifier["presentvalue"]) logger.info("Updating AnalogInput (0) PresentValue: %s", round(presentValue, 1)) # Main application # ----------------------------------------------------------------------------- if __name__ == "__main__": print("FYI: CAS BACnet Stack Python Server Example v0.1.0") print("FYI: https://github.com/chipkin/BACnetServerExamplePython") # 0. Check for required dependencies: Python version, BACnet Stack DLL and required packages # for this example # --------------------------------------------------------------------------------------------- # Check Python version if sys.version_info < (3, 7): logging.error("Python 3.7 or higher is required.") sys.exit(1) # Check for CASBACnetStack_x64_Release.dll dll_path = os.path.join(os.path.dirname(__file__), 'CASBACnetStack_x64_Release.dll') if not os.path.isfile(dll_path): logging.error(f"Missing required DLL: {dll_path}") sys.exit(1) # Check for required packages try: import ctypes import json except ImportError as e: logging.error(f"Missing required package: {e.name}") sys.exit(1) # 1. Load the CAS BACnet stack functions # --------------------------------------------------------------------------------------------- # Load the shared library into ctypes libpath = pathlib.Path().absolute() / libname logger.info("Library path: %s", libpath) CASBACnetStack = ctypes.CDLL(str(libpath), mode=ctypes.RTLD_GLOBAL) if not CASBACnetStack: logger.error("Failed to load CAS BACnet Stack library") sys.exit(1) # Print the version information logger.info("CAS BACnet Stack version: %s.%s.%s.%s", CASBACnetStack.BACnetStack_GetAPIMajorVersion(), CASBACnetStack.BACnetStack_GetAPIMinorVersion(), CASBACnetStack.BACnetStack_GetAPIPatchVersion(), CASBACnetStack.BACnetStack_GetAPIBuildVersion()) logger.info("CAS BACnet Stack python adapter version: %s", casbacnetstack_adapter_version) # 2. Setup the callbacks # --------------------------------------------------------------------------------------------- logger.info("Registering the Callback Functions with the CAS BACnet Stack") # Note: # Make sure you keep references to CFUNCTYPE() objects as long as they are used from C code. # ctypes doesn't, and if you don"t, they may be garbage collected, crashing your program when # a callback is made # # Because of garbage collection, the pyCallback**** functions need to stay in scope. pyCallbackReceiveMessage = fpCallbackReceiveMessage(CallbackReceiveMessage) CASBACnetStack.BACnetStack_RegisterCallbackReceiveMessage( pyCallbackReceiveMessage) pyCallbackSendMessage = fpCallbackSendMessage(CallbackSendMessage) CASBACnetStack.BACnetStack_RegisterCallbackSendMessage( pyCallbackSendMessage) pyCallbackGetSystemTime = fpCallbackGetSystemTime(CallbackGetSystemTime) CASBACnetStack.BACnetStack_RegisterCallbackGetSystemTime( pyCallbackGetSystemTime) pyCallbackGetPropertyBitString = fpCallbackGetPropertyBitString( CallbackGetPropertyBitString) CASBACnetStack.BACnetStack_RegisterCallbackGetPropertyBitString( pyCallbackGetPropertyBitString) pyCallbackGetPropertyBool = fpCallbackGetPropertyBool( CallbackGetPropertyBool) CASBACnetStack.BACnetStack_RegisterCallbackGetPropertyBool( pyCallbackGetPropertyBool) pyCallbackGetPropertyCharString = fpCallbackGetPropertyCharString( CallbackGetPropertyCharString) CASBACnetStack.BACnetStack_RegisterCallbackGetPropertyCharacterString( pyCallbackGetPropertyCharString) pyCallbackGetPropertyDate = fpCallbackGetPropertyDate( CallbackGetPropertyDate) CASBACnetStack.BACnetStack_RegisterCallbackGetPropertyDate( pyCallbackGetPropertyDate) pyCallbackGetPropertyDouble = fpCallbackGetPropertyDouble( CallbackGetPropertyDouble) CASBACnetStack.BACnetStack_RegisterCallbackGetPropertyDouble( pyCallbackGetPropertyDouble) pyCallbackGetPropertyEnum = fpCallbackGetPropertyEnum( CallbackGetPropertyEnumerated) CASBACnetStack.BACnetStack_RegisterCallbackGetPropertyEnumerated( pyCallbackGetPropertyEnum) pyCallbackGetPropertyOctetString = fpCallbackGetPropertyOctetString( CallbackGetPropertyOctetString) CASBACnetStack.BACnetStack_RegisterCallbackGetPropertyOctetString( pyCallbackGetPropertyOctetString) pyCallbackGetPropertyInt = fpCallbackGetPropertyInt(CallbackGetPropertyInt) CASBACnetStack.BACnetStack_RegisterCallbackGetPropertySignedInteger( pyCallbackGetPropertyInt) pyCallbackGetPropertyReal = fpCallbackGetPropertyReal( CallbackGetPropertyReal) CASBACnetStack.BACnetStack_RegisterCallbackGetPropertyReal( pyCallbackGetPropertyReal) pyCallbackGetPropertyTime = fpCallbackGetPropertyTime( CallbackGetPropertyTime) CASBACnetStack.BACnetStack_RegisterCallbackGetPropertyTime( pyCallbackGetPropertyTime) pyCallbackGetPropertyUInt = fpCallbackGetPropertyUInt( CallbackGetPropertyUInt) CASBACnetStack.BACnetStack_RegisterCallbackGetPropertyUnsignedInteger( pyCallbackGetPropertyUInt) pyCallbackSetPropertyUInt = fpCallbackSetPropertyUInt( CallbackSetPropertyUInt) CASBACnetStack.BACnetStack_RegisterCallbackSetPropertyUnsignedInteger( pyCallbackSetPropertyUInt) pyCallbackSetPropertyOctetString = fpCallbackSetPropertyOctetString( CallbackSetPropertyOctetString) CASBACnetStack.BACnetStack_RegisterCallbackSetPropertyOctetString( pyCallbackSetPropertyOctetString) pyCallbackReinitializeDevice = fpCallbackReinitializeDevice( CallbackReinitializeDevice) CASBACnetStack.BACnetStack_RegisterCallbackReinitializeDevice( pyCallbackReinitializeDevice) # pyCallbackDeviceCommunicationControl = fpCallbackDeviceCommunicationControl(CallbackDeviceCommunicationControl) # CASBACnetStack.BACnetStack_RegisterCallbackDeviceCommunicationControl(pyCallbackDeviceCommunicationControl) # pyCallbackLogDebugMessage = fpCallbackLogDebugMessage(CallbackLogDebugMessage) # CASBACnetStack.BACnetStack_RegisterCallbackLogDebugMessage(pyCallbackLogDebugMessage) # 3. Setup the BACnet device # --------------------------------------------------------------------------------------------- logger.info("Setting up server Device. device.instance=%s", DEVICE_INSTANCE) if not CASBACnetStack.BACnetStack_AddDevice(DEVICE_INSTANCE): logger.error("Failed to add Device") exit() # 4. Enable optional BACnet services. # --------------------------------------------------------------------------------------------- for service in ["readPropertyMultiple", "writeProperty", "writePropertyMultiple", "subscribeCov", "subscribeCovProperty", "reinitializeDevice", "deviceCommunicationControl", "iAm", "confirmedTextMessage", "unconfirmedTextMessage"]: logger.info("Enabling service: %s (%s)", service, casbacnetstack_service[service]) CASBACnetStack.BACnetStack_SetServiceEnabled( DEVICE_INSTANCE, casbacnetstack_service[service], True) # 5. Add objects to the device # --------------------------------------------------------------------------------------------- objectList = BACnetDatabase.GetObjectsList(DEVICE_INSTANCE) if objectList is None or len(objectList) == 0: logger.error( "No objects found in database for device instance %s", DEVICE_INSTANCE) exit() AddObjectsFromDatabase(objectList) # 6. Network port is a special object that needs to be added and configured # --------------------------------------------------------------------------------------------- if AddAndConfigureNetworkPort(DEVICE_INSTANCE) is False: logger.error("Failed to add and configure network port") exit() # 7. Connect the UDP resource to the BACnet Port and get network info # --------------------------------------------------------------------------------------------- udp_port = BACnetDatabase.Get( DEVICE_INSTANCE, bacnet_objectType["networkPort"], NETWORK_PORT_VERMILLION_INSTANCE, bacnet_propertyIdentifier["bacnetipudpport"]) if udp_port is None: logger.error("Failed to get UDP port") exit() ConnectToSocket(int(udp_port)) # 8. Send I-Am # To be a good BACnet citizen, we need to send an I-Am broadcast to let other BACnet devices # know we are here # --------------------------------------------------------------------------------------------- SendIAmBroadcast() # 9. Start the main loop # --------------------------------------------------------------------------------------------- logger.info("Entering main loop...") while True: # Call the CAS BACnet Stack tick function which checks for messages and processes them. # This function needs to be called at least once a second. CASBACnetStack.BACnetStack_Tick() # Sleep between loops. Give some time to other application time.sleep(0.1) # Every x seconds increment the AnalogInput presentValue property by 0.1 if lastTimeValueWasUpdated + 3 < time.time(): lastTimeValueWasUpdated = time.time() updateValues() |
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