Home Page Forums Raspberry Pi Shields 3G/LTE Connection Issue

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This topic contains 8 replies, has 5 voices, and was last updated by  bbelot 3 months, 2 weeks ago.

Viewing 9 posts - 1 through 9 (of 9 total)
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    Posts
  • #1940

    pedrodiazsos
    Participant

    I’ve followed the tutorial to the letter but can’t get online, this is the error i’m getting

    Did someone experience this??

    Thanks

    #2187

    percy4209
    Participant

    Did you ever fix this?? I am having the same problem!

    #2189

    saksphosri
    Participant

    Did you ever fix this?? I am having the same problem too!

    [email protected]:~$ sudo pppd call gprs
    pppd options in effect:
    debug # (from /etc/ppp/peers/gprs)
    nodetach # (from /etc/ppp/peers/gprs)
    dump # (from /etc/ppp/peers/gprs)
    noauth # (from /etc/ppp/peers/gprs)
    remotename 3gppp # (from /etc/ppp/peers/gprs)
    /dev/ttyUSB3 # (from /etc/ppp/peers/gprs)
    115200 # (from /etc/ppp/peers/gprs)
    lock # (from /etc/ppp/peers/gprs)
    connect chat -s -v -f /etc/chatscripts/quectel-chat-connect -T internet # (from /etc/ppp/peers/gprs)
    disconnect chat -s -v -f /etc/chatscripts/quectel-chat-disconnect # (from /etc/ppp/peers/gprs)
    nocrtscts # (from /etc/ppp/peers/gprs)
    modem # (from /etc/ppp/peers/gprs)
    asyncmap 0 # (from /etc/ppp/options)
    lcp-echo-failure 4 # (from /etc/ppp/options)
    lcp-echo-interval 30 # (from /etc/ppp/options)
    hide-password # (from /etc/ppp/peers/gprs)
    novj # (from /etc/ppp/peers/gprs)
    novjccomp # (from /etc/ppp/peers/gprs)
    ipcp-accept-local # (from /etc/ppp/peers/gprs)
    ipcp-accept-remote # (from /etc/ppp/peers/gprs)
    ipparam 3gppp # (from /etc/ppp/peers/gprs)
    noipdefault # (from /etc/ppp/peers/gprs)
    ipcp-max-failure 30 # (from /etc/ppp/peers/gprs)
    defaultroute # (from /etc/ppp/peers/gprs)
    usepeerdns # (from /etc/ppp/peers/gprs)
    noccp # (from /etc/ppp/peers/gprs)
    noipx # (from /etc/ppp/options)
    abort on (BUSY)
    abort on (NO CARRIER)
    abort on (NO DIALTONE)
    abort on (ERROR)
    abort on (NO ANSWER)
    timeout set to 30 seconds
    send (AT^M)
    expect (OK)
    ^M
    OK
    — got it

    send (ATE0^M)
    expect (OK)
    ^M
    ^M
    OK
    — got it

    send (ATI;+CSUB;+CSQ;+CPIN?;+COPS?;+CGREG?;&D2^M)
    expect (OK)
    ^M
    ^M
    Quectel^M
    UC20^M
    Revision: UC20GQBR03A14E1G^M
    ^M
    SubEdition: V01^M
    ^M
    +CSQ: 99,99^M
    ^M
    +CPIN: READY^M
    ^M
    +COPS: 0^M
    ^M
    +CGREG: 0,2^M
    ^M
    OK
    — got it

    send (AT+CGDCONT=1,”IP”,”internet”,,0,0^M)
    expect (OK)
    ^M
    ^M
    OK
    — got it

    send (ATD*99#^M)
    expect (CONNECT)
    ^M
    ^M
    CONNECT
    — got it

    Script chat -s -v -f /etc/chatscripts/quectel-chat-connect -T internet finished (pid 1598), status = 0x0
    Serial connection established.
    using channel 2
    Using interface ppp0
    Connect: ppp0 <–> /dev/ttyUSB3
    sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xc7ace46> <pcomp> <accomp>]
    rcvd [LCP ConfReq id=0x3 <asyncmap 0x0> <auth chap MD5> <magic 0x271ce91> <pcomp> <accomp>]
    No auth is possible
    sent [LCP ConfRej id=0x3 <auth chap MD5>]
    rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0xc7ace46> <pcomp> <accomp>]
    rcvd [LCP ConfReq id=0x4 <asyncmap 0x0> <magic 0x271ce91> <pcomp> <accomp>]
    sent [LCP ConfAck id=0x4 <asyncmap 0x0> <magic 0x271ce91> <pcomp> <accomp>]
    sent [LCP EchoReq id=0x0 magic=0xc7ace46]
    sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
    rcvd [LCP DiscReq id=0x5 magic=0x271ce91]
    rcvd [LCP EchoRep id=0x0 magic=0x271ce91 0c 7a ce 46]
    Modem hangup
    Connection terminated.

    #2198

    pedrodiazsos
    Participant

    I’m still trying to sort it out, I bought several sim cards (3 different phone companies) and none of them work… I did notice that

    +CSQ: 99,99^M

    Means you have low signal, I was using no antennas so now I bought them and I’m expecting them to arrive to retry the whole operation..

    I did tried these SIM cards with my phone and they were all working so… my only option now is to try the antennas and see what happens after that

    Please let me know if you solve it in a different ways or send me an email so we can keep contact

    #2199

    pedrodiazsos
    Participant

    Unfortunately I haven’t been able to have a connection using the shield.

    I have bought 3 different sim cards and I haven’t had any success with them.

    The only clue I’m following now is regarding this line…

    +CSQ: 99,99^M

    This actually means the signal is low. I bought antennas and haven’t received them. I’ll give it a try as soon as I get them.

    Let’s stay in touch… @pedrodiazsos on twitter.

    #2528

    bbelot
    Participant

    Hi,

    I have the same issue, and I resolved it by use a bigger antenna ! 😀
    (Like what, size matters… ^^ )

    I hope I helped you 😉
    Bye
    Benjamin

    #2541

    pedrodiazsos
    Participant

    I was finally able to connect when I received the Antennas… Thanks to all

    #2828

    Suryadiputra
    Participant

    i am using two antenna (PC27 Cellular Miniature FR4 PCB Antenna) default from sixfab.
    i got +CSQ: 14,99^M
    what is the meaning of that number?

    which bigger antenna do you use?

    #2981

    bbelot
    Participant

    Hi,

    If you got +CSQ: 14,99.
    ’14’ means that you received a signal with an almost good quality.
    ’99’ means that you have a Bit Error Rate not known or not detectable.

    You can read this post : http://m2msupport.net/m2msupport/signal-quality/

    I don’t know if this error come from the antenna but :
    The antenna I used is this one.

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