(19.04.2024, 07:55)admin Wrote: 1. Check that the modem is detected when the system starts in System config > Status > System log.

2. Run this script and post what you get in Logs:

Code:

tty1 = '/dev/ttyACM3'
tty2 = '/dev/ttyUSB2'

if io.exists(tty1) then
  tty = tty1
elseif io.exists(tty2) then
  tty = tty2
else
  log('port not found')
  return
end

port = require('serial').open(tty)
if not port then
  log('cannot open port')
  return
end

function readstatus()
  local data, res, simok, network

  port:flush()
  port:write('AT+CSQ\r\n')

  data = port:read(1000, 1)

  if data then
    res = data:match('+CSQ: (%d+)')
    res = tonumber(res)

    if res then
      log('Signal: ' .. tostring(res))
    else
      log('Signal: no response')
    end
  else
    log('Signal: no data from port')
  end

  port:flush()
  port:write('AT+CPIN?\r\n')

  data = port:read(1000, 1) or ''

  if data:find('CME ERROR') then
    log('SIM: not found')
  elseif data:find('+CPIN: READY') then
    log('SIM: OK')
    simok = true
  else
    log('SIM: unknown')
  end

  port:flush()
  port:write('AT+COPS?\r\n')

  data = port:read(1000, 1)

  if data then
    res = data:match('+COPS: %d+,%d+,"(.*)",%d+')

    if res then
      log('Network: ' .. tostring(res))
      network = res
    else
      log('Network: no info')
    end
  else
    log('Network: no data from port')
  end

  return simok and network
end

for i = 1, 20 do
  if readstatus() then
    break
  end
end

(19.04.2024, 08:17)admin Wrote: Maybe it's a hardware fault. Is it a new device or an older one that worked before?