Modbus SunSpec support

[mlaudren]

If the modbus bus is not proprietary the LM should be able to handle it.

You can try with this.

Code:

require('luamodbus')
mb = luamodbus.rtu()
mb:open('/dev/RS485', 19200, 'E', 8, 1, 'H') -- change with correct MB settings : speed, parity, stop bit, ...
mb:connect()

if mb ~= nil then
    value = mb:readregisters(40188) -- read AC current register
 log(value)

    mb:close()
end