Modbus TCP client and server library written in Gengo.
A real-world use of Gengo's module system, module-qualified types, bitwise
operators, structural interfaces, and the cap:net TCP capability.
- Gengo v0.5.0-pre6 or later
cap:netcapability (--cap netfor client,--cap net=listen --net-listen-allow <addr>for server)
# terminal 1 — start the server gengo --cap net=listen --net-listen-allow 127.0.0.1:5020 --modules ./modbus server_demo.gengo # terminal 2 — run the client demo gengo --cap net --modules ./modbus demo.gengo
modbus/
constants.gengo Function codes and exception codes
frame.gengo MBAP frame build + parse
client.gengo Client struct, Connection interface, read/write functions
server.gengo Server with data stores, range callbacks, listen
codec.gengo IEEE 754 float / integer register codec
demo.gengo Client demo (temperature controller)
server_demo.gengo Server demo (temperature controller)