problem with 4g modem

[admin]

Post what you have in System config > Status > System log.

[andrepneves@gmail.com]

Hi,

Thank for the quick reply.
Here it goes.

[admin]

What LM hardware model are you using?

[andrepneves@gmail.com]

LM5p2-RIO3LTE

LM5M3CV15xA23010267

[admin]

Do you have 3G/4G connection enabled? If it's disabled then the on-board modem won't be initialized.

[andrepneves@gmail.com]

It was disabled. When we try to enable it the LM stops responding.

[admin]

This most likely caused by LM using mobile connection gateway instead of Ethernet.
Follow this guide if you only need SMS without 3G/4G: https://forum.logicmachine.net/showthrea...7#pid33127

[andrepneves@gmail.com]

It worked. Thanks!

I still have a strange situation. In the alert I still get "SMS handler lost connection" but the SMS are getting through. I only happens with a card from one provider. Using a card from a different provider it doesn't happen.

[admin]

Modify AT:run() function in the user library as follows and post what you get in LM Logs tab.

Code:

function AT:run()
  local res, err, cmd, pos, sms

  res, err = self:read()
  if err then
    if err ~= 'timeout' then
      log('run error', err)
    end

    return err == 'timeout'
  end

  -- check for incoming command
  if res:sub(1, 1) ~= '+' then
    return true
  end

  pos = res:find(':', 1, true)

  if not pos then
    return true
  end

  -- get command type
  cmd = res:sub(2, pos - 1)

  -- check only for incoming sms
  if cmd ~= 'CMTI' then
    log('run cmd', cmd)

    return
  end

  -- read from sim
  sms = self:incsms(res)

  -- sms seems to be valid, pass to handler if specified
  if sms and self.smshandler then
    self.smshandler(sms)
  end

  return true
end

[andrepneves@gmail.com]

Here goes the log.

[admin]

Change the same function as follows and see if it helps.

Code:

function AT:run()
  local res, err, cmd, pos, sms

  res, err = self:read()
  if err then
    return err == 'timeout'
  end

  -- check for incoming command
  if res:sub(1, 1) ~= '+' then
    return true
  end

  pos = res:find(':', 1, true)

  if not pos then
    return true
  end

  -- get command type
  cmd = res:sub(2, pos - 1)

  -- check only for incoming sms
  if cmd == 'CMTI' then
    -- read from sim
    sms = self:incsms(res)

    -- sms seems to be valid, pass to handler if specified
    if sms and self.smshandler then
      self.smshandler(sms)
    end
  end

  return true
end

[EjvindHald]

I have the LM with the built-in LTE modem. It has been configured, so it is only used for SMS, while the RJ45 port is used for all IP traffice.

I have created the standard scripts according to the guide, and I can send SMS without any problems. This works very stable. However, when I try to send a SMS to the LTE modem, then nothing happens. An example of SMS is "W 1//1/9 false" without the quotes to turn off something. I get no response on read. My sender phone number is allowed in the script, and I have tried both with and without country code.

I hope you can provide some temporary changes to the script, so I can find what I have missed.

Thanks.

[admin]

Do you have anything in LM Alerts tab? Messages from all numbers are logged there.

[EjvindHald]

Yes, there are messages. See screen shot with todays messages, where I tried off instead of false, but with same result.

[admin]

Make sure that the number is specified in the script the same way as in the alert between [].

Modify the handler function in the resident script as follows and post what you get in Logs tab:

Code:

handler = function(sms)
  -- sms from known number, call parser
  if table.contains(numbers, sms.sender) then
    log('incoming sms', sms.sender, sms.data)
    parser(sms.data, sms.sender)
  else
    log('unknown number', sms.sender)
  end
end

For on/off use 0/1 or true/false.

[EjvindHald]

I saw that the + sign in front of the country code was missing in the alert log, so I tried to remove the + sign and still country code number. That worked, and I have now for the first time received a response on a read SMS.

If I reboot the LM, and I send one SMS everything works fine. Both read and write. However, the next SMS send does not appear in the Alerts. Only if I reboot LM, it works correct for one single message. After a reboot it actually picks up the previous waiting message and responds.

I am using LM reboot functionality - no power recycle.

[admin]

Is the resident script configured correctly with 0 sleep time?

[EjvindHald]

Yes, see screen shot. The Generel Timer also shown is actually your staircase example with my own add ons.

---

This is my normal CPU and memory stats:

[admin]

In the user library add logging to the AT:run() function:

Code:

function AT:run()
  local res, err, cmd, pos, sms

  res, err = self:read()
  log(res, err)

Then check what you get in LM Logs tab.

[EjvindHald]

I opened the user library and added the single line "log(res, err)" saved and tried again. Then everything worked smooth. Then I commented out that line and it still works fine with  immediate reply.

Sorry for all this - I do not know why it did not work before. But it is working fine now. And I am glad that I now know where to add a log statement to gain more info in case of future problems.

Thanks and enjoy your weekend.

Update: after a LM reboot the same faulty behavior came back with only processing one message and then it stops. I will try to get some log info.

---

I have now tried editing log on and off + reboot, and I cannot find a pattern in the behavior. Only thing is that it generally seems to work better when the log writing is enabled, which makes no sense to me. I cannot go with this, because the log will be flooded with messages, as it issues a timeout message every second. 

I never see any error messages in the log. Only many timeouts and now and then processing of a message. See screen shot.