SODAQ SARA SFF R412 not responding

Hello,
We placed an order for two SODAQ SARA SFF R412.

One of them doesn’t work correctly, I load the Passthrough program but when I send the AT command, I don’t get a response. What is the problem?

Best regards

Hi,

Almost same problem here: yesterday the module was responding correctly to commands but today it started to send me back the commands I sent to it. I tried to turn echo off (ATE0) and do a factory reset (AT&F and AT&F0) but none solves my problem.

Any help appreciated on this too!

@carlos In the meantime, you could try to listen to the UART of the R412 module (PIN 22 on ATSAMD21) with a sharp connector to see what’s coming from the module (115200 bauds) as a response from your command.

Hi @carlos and @jeff,

Did you connect a battery to your board?

In the latest software psm is enabled, did you disable psm? When enabled the module will go to sleep and then it wont react anymore with the passthrough sketch.

Best regards,
Jan

Hi @Jan,

Yes I connect a battery to the board, I don’t power by USB. I was thinking the battery was flat then I fully charged it but the problem persists.

When the module was responding in the first days, I sent it these commands:

AT+CPSMS=0
AT+CEDRXS=0
AT+UPSV=0

Then I sent other commands like AT+CFUN=15.

I was able to program the board and use it for almost 5 days, then it started to echo back the commands I sent to it and seem to not respond anymore like before.

When it was working, I could get an output like AT+CGMR\r\r\nM0.10.00 [Mar 28 2019 17:13:41]\r\n\r\nOK\r\n.

Now I only get this AT+CGMR\r.

Do you think that the module, in PSM, would simply echo back the command or give no output at all?

Hi @jeff,

Can you see if your device runs with the universal tracker software?

Also in this sketch the PSM will be disabled for you.

Best regards,
Jan

Hi @jan,

I have connected the battery and the modem still does not respond to the AT command.

I have tried to run the universal tracker software, but the modem does not respond, the timeout always jumps.

I think the modem is broken.

Best regards

Hi @carlos,

Please contact the webshop to replace your board.
shop at sodaq dot com

Best regards,
Jan

Hi @Jan,

I could upload the Universal Tracker sketch but when issuing commands to show the IMEI or version but every command fails:

Enter command: SI
Initializing modem...
Modem initialized.
IMEI: 
Please note that the modem is now initialized.
*** If you need to change the type of network please reboot first.
...

rest of console message, then it reboots infinitely:

** SODAQ - Universal Tracker - 1.0.3 **

 -> CPU reset by Watchdog [32]

*** GPS not found!
** SODAQ - Universal Tracker - 1.0.3 **

 -> CPU reset by Watchdog [32]

*** GPS not found!
** SODAQ - Universal Tracker - 1.0.3 **

 -> CPU reset by Watchdog [32]

*** GPS not found!
** SODAQ - Universal Tracker - 1.0.3 **

 -> CPU reset by Watchdog [32]

*** GPS not found!
** SODAQ - Universal Tracker - 1.0.3 **

 -> CPU reset by Watchdog [32]

*** GPS not found!
** SODAQ - Universal Tracker - 1.0.3 **

 -> CPU reset by Watchdog [32]

*** GPS not found!

I’m not able to receive anything from the modem.

Looks like I have the same problem as Carlos.

Hi @jeff,

It seems like you compiled and uploaded the sketch for the wrong board.
Did you select the “SODAQ SFF”? It seems like you selected “SODAQ SARA” as your board.

Best regards,
Jan

Hi @Jan,

Indeed I selected the wrong board :-/

Now with “Sodaq SFF” I get this output:

Enter command: SI
Initializing modem...
Modem initialized.
IMEI: 
Please note that the modem is now initialized.
*** If you need to change the type of network please reboot first.

Commands:
  Show IMEI                                  (SI): 
  Show CCID                                  (SC): 
  Show Module version                        (SV): 
  Commit Settings                            (CS): 

After entering the command to get the IMEI (SI), it freezes for approx. 20 seconds then displays the menu to enter commands again, and not the IMEI.

Looks like something’s wrong again.

Hi @jeff,

Did you do the test with a battery attached?
If yes, please contact the webshop to swap your board for a working board.

Best regards,
Jan

Yes, the battery attached was LiPo 2500 mAh almost fully charged.

I’ll contact the webshop for a swap.

Thank you @Jan

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