at commands socket connection (socket dial[NO CARRIER])

[AlganEren]

def socket_connect(ip, port, timeout_secs):
    # returns: True if connection successful
    print("connecting to ip - {0}, port - {1}".format(ip, port))

    # make sure socket is closed
    socket_close()

    # socket configuration
    # connID = 1 --> socket connection identifier
    # cid = 1 --> PDP context identifier
    # pktSz = 1500 --> packet size
    # maxTo = 10 --> exchange timeout in secs
    # connTo = 600 --> connection timeout in msecs
    # txTo = 3 --> data sending timeout in hundreds of msecs
    # a = at('AT+SQNSCFG=1,1,1500,10,600,3', 'OK')
    a = at('AT+SQNSCFG=1,1,1500,{0},600,3'.format(timeout_secs))
    if len(a) == 0:
        print("error connecting")
        return False
    
    # socket extended configuration
    # connID = 1 --> socket connection identifier
    # srMode = 1 --> SQNSRING URC data amount mode
    # recvDataMode = 1 --> data in hex
    # keepalive = 0 --> unused
    # listenAutoRsp = 0 --> deactivated
    # sendDataMode = 1 --> data in hex
    a = at('AT+SQNSCFGEXT=1,1,1,0,0,1')
    if len(a) == 0:
        print("error connecting")
        return False

    #a = at('AT+SQNSL=1,1,{0}'.format(port))

    # socket dial
    # connID = 1 --> socket connection identifier
    # txProt = 0 --> TCP protocol
    # rPort = <port> --> remote host port to contact
    # IPaddr = <ip> --> address of remote host
    # closureType = 0 --> local host closes immediately when remote host has closed
    # lPort = 0 --> UDP port (not used)
    # connMode = 1 --> command mode connection
    # acceptAnyRemote = 0 --> disabled 
    a = at('AT+SQNSD=1,0,{0},"{1}",0,0,1,0'.format(port,ip))
    if len(a) == 0:
        print("error connecting")
        return False
    print("** connection successful **")
    return True

I set the socket config and extend config parameters as follows and the modem's response is 'OK'. It's okay, but I get an error saying '[NO CARRIER]' on socket dial.

modem command: AT+SQNSD=1,0,42000,"10.164.0.93.255.255.255.255",0,0,1,0
modem response: ['NO CARRIER']

What could be the reason for this? Can anyone with an idea help me?

Thank you for your return and advices.

[Gijs]

The NO CARRIER error is related to the Modem not being connected to a network, hence the No carrier. Also, it seems your IP address is not correct as "10.164.0.93.255.255.255.255", I believe it should be "10.164.0.93"