farmitry_hvac/modbus.rb

22 lines
405 B
Ruby

require "rmodbus"
require "ccutrer-serialport"
mode = ARGV[0].strip
controller_id = ARGV[1].to_i
value = ARGV[2].to_i
ModBus::RTUClient.new("/dev/ttyUSB0", 9600) do |cl|
cl.with_slave(controller_id) do |slave|
regs = slave.holding_registers
case mode
when "temp"
regs[2] = value
when "power"
regs[22] = value
else
# type code here
end
sleep 0.1
end
end