Freematics Forum

Hi,

I'm having trouble when connecting Freematics ONE to GSM/GPRS network. I have tried few different SIM's all with no PIN lock and working in smartphones. With code provided by Freematics loggins says GSM - OK, GRPS - OK but still no connection. With my own code I get following logging,which seems to tell that device is not able to connect to operator:


ALL POSSIBLE BANDS OF DEVICE
CBAND=?
(EGSM_MODE,DCS_MODE,GSM850_MODE,PCS_MODE,EGSM_DCS_MODE,GSM850_PCS_MODE,EGSM_PCS_MODE,ALL_B
AND)

CBAND = "ALL_BAND"
OK


+CBAND?
EGSM_MODE,ALL_BAND


PFUN=1
OK

COPS?
+COPS: 0
OK

GET SIGNAL
+CSQ: 0,0

CREG?
+CREG: 1,2

After that device stays in mode where it tries to find network but is unable to find/register, so when I query CREG? again reply is always CREG:1,2.

Any ideas what could be wrong?

In most cases this is caused by poor signal reception.

Thanks for replying,

Is there any commands I could try to get device working?
Same SIM in mobile device at same location gets "full" signal so its weird that Freematics has poor signal.

I have the same issue..
Verify that the frequencies and the cellular protocol of the sim matches the modem.

Can you please tell how you send commands to the modem sim800L using the freematics ONE board ?

On the freematics lib it looks like it uses SPI but as far as I know it should be RS232 so i'm confused..

Tnx

I have a similar issue,
I get the message
+cpsi: no service,online arduino

If "no service", either APN incorrect, APN password required, or network band not matching.