Freematics connecting to incompatible network on roaming card

[Tenou]

Hey everyone,

I recently received my first ever Freematics One+ with the SIM7070G module.
I purchased a SIM card from simbase.

Simbase supports multiple operators in my country, Germany, like O2, E-Plus and Vodafone.
Nine times out of ten, I'm being connected to the Vodafone network, however according to simbase, only O2 supports LTE-M in my country.
Therefore, any attempt to transmit data over the Vodafone network results in a timeout.

I only have a very limited understanding of programming, and an even more limited understanding of how this SIM7070G works.

I tried limiting the bands as well as manually configuring O2 as the prefered operator in the library, however with no success.

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sendCommand("AT+CBANDCFG=CAT-M,8,20\r");
sendCommand("AT+COPS=1,2,\"26203\",7\r");

I have already ordered SIM cards from other providers in the area to test out, but ultimately, I'd love for this one to work due to the great price/performance ratio of their service.

[Tenou]

I have received two more SIM cards, one from DTAG, one from Vodafone.

Behaviour for both cards is a loop of the following (obv. with differing APNs):

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[CELL] Activating...
CELL:SIM7070G
IMEI:Redacted
[CELL] Searching...
APN:lpwa.vodafone.com
[Redacted BUF & GPS messages]

+CGREG: 0,0

OK


+CGREG: 0,0

OK

Both cards are supporting the LTE Cat-M1 & NB-IoT networks.

[Tenou]

I have disabled the OBD connection (#define ENABLE_OBD 0) for as long as I'm testing in my office. Since, I assume, the device doesn't go into standby after three OBD comm failures, it allows to better test the cell connection.

Disregarding the buffer-messages, the current behaviour consists of a single

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[CELL] Activating...

message, followed by a

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[CELL] No supported module

message roughly 70 seconds later, then repeat.

This behaviour is consistent across all four SIMs I have available to me, three of which are exclusively LTE-M/NBIoT, whilst the fourth one supports a multitude of standards, including LTE-M.


Full output:

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0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:1344
load:0x40078000,len:13936
load:0x40080400,len:3600
entry 0x400805f0
CPU:160MHz FLASH:16MB
IRAM:343KB
DEVICE ID:REDACTED
MEMS:ICM-42627
ACC BIAS:-0.02/-0.01/1.01
GNSS:NO
SD:15176 MB total, 1 MB used
File: /DATA/157.CSV
[CELL] Activating...
[BUF] 2 samples | 24 bytes | 1/32
[BUF] 8 samples | 96 bytes | 4/32
[BUF] 14 samples | 168 bytes | 7/32
[BUF] 20 samples | 240 bytes | 10/32
[BUF] 24 samples | 288 bytes | 12/32
[BUF] 28 samples | 336 bytes | 14/32
[BUF] 32 samples | 384 bytes | 16/32
[BUF] 36 samples | 432 bytes | 18/32
[BUF] 40 samples | 480 bytes | 20/32
[BUF] 44 samples | 528 bytes | 22/32
[BUF] 48 samples | 576 bytes | 24/32
[BUF] 52 samples | 624 bytes | 26/32
[BUF] 56 samples | 672 bytes | 28/32
[BUF] 60 samples | 720 bytes | 30/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[CELL] No supported module
[BUF] 64 samples | 768 bytes | 32/32
[CELL] Activating...
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[CELL] No supported module
[BUF] 64 samples | 768 bytes | 32/32
[CELL] Activating...
[BUF] 64 samples | 768 bytes | 32/32
[FILE] 1KB
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
[BUF] 64 samples | 768 bytes | 32/32
Stationary for 180 secs
STANDBY

[stanley]

Disabling OBD and cellular module not being recognized was caused by a bug and is now fixed in the latest code.

[terassda]

ou can use FreematicsOBD function

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CODE: SELECT ALL
readPID(byte pid, ind& result)

It will take PID as argument. Alternatively you can look into the source code (FreematocsOBD.cpp) of this function and tweak it to send your message and wait for the answer.