How to control the KNX bus via SMS and send notices via SMS?

[admin]

1. Modify the user library send function so it returns the command reply/result:

Code:

-- send command to terminal function AT:send(cmd)   local res, err = self.port:write(cmd .. '\r\n')   local reply   -- write ok, get local echo   if res then     res, err = self:readuntil(cmd)     reply = self:read()   end   return res, err, reply end

2. Add before handler = function(sms) in the resident script:

Code:

readcsq = function()     local res, err, reply = modem:send('AT+CSQ')     local rssi     if reply then       rssi = reply:match('%+CSQ:%s+(%d+),(%d+)')     end     rssi = tonumber(rssi) or 0     if 2 <= rssi and rssi <= 9 then       quality = 'marginal'     elseif 10 <= rssi and rssi <= 14 then       quality = 'ok'     elseif 15 <= rssi and rssi <= 19 then       quality = 'good'     elseif 20 <= rssi and rssi <= 30 then       quality = 'excellent'     else       quality = 'unknown'     end   end   csqtime = os.time()

3. Add before udphandler(server) in the resident script:

Code:

now = os.time()     delta = math.abs(now - csqtime)     if delta >= 15 then       csqtime = now       readcsq()     end

This will read the signal quality every 15 seconds and will set global variable quality that you can use in the SMS reply message.