F&F LE-03MQ Modbus energy counter

[Erwin van der Zwart]

Hi,

Try this: ( i think your second port is RS485-2 but please check this )

Code:

require('luamodbus')
mb = luamodbus.rtu()
mb:open('/dev/RS485-2', 9600, 'N', 8, 1, 'H')
mb:connect()
mb:setslave(1)

-- L1 - N
r1, r2 = mb:readinputregisters(0, 2) 
if r1 then 
  value = lmcore.inttohex(r1, 2) .. lmcore.inttohex(r2, 2) 
  value = knxdatatype.decode(value, dt.float32)  
 currentvalue = grp.getvalue('32/1/1') 
  if currentvalue ~= value then
    grp.update('32/1/1', value)
  end
end

-- L2 - N
r1, r2 = mb:readinputregisters(2, 2) 
if r1 then 
  value = lmcore.inttohex(r1, 2) .. lmcore.inttohex(r2, 2) 
  value = knxdatatype.decode(value, dt.float32)  
  currentvalue = grp.getvalue('32/1/2') 
  if currentvalue ~= value then
    grp.update('32/1/2', value)
  end
end

-- L3 - N
r1, r2 = mb:readinputregisters(4, 2) 
if r1 then 
  value = lmcore.inttohex(r1, 2) .. lmcore.inttohex(r2, 2) 
  value = knxdatatype.decode(value, dt.float32)  
  currentvalue = grp.getvalue('32/1/3') 
  if currentvalue ~= value then
    grp.update('32/1/3', value)
  end
end

mb:close()

BR,

Erwin