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ELS61 bootloop | Thales IoT Developer Community

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llogar's picture
llogar

September 13, 2022 - 12:57pm, 537 views

Hi,

I've "successfully" installed and run an app that immediately crashes. It crashes even before the AT commands can be entered. And since I've smartly enabled auto-run and auto-restart, I am stuck with a never-ending ^SYSLOADING boot loop.

Can an autostart somehow be disabled without entering the AT commands (the module is rebooting so quickly that even the USB interface just momentarily appears and then disappears again).

Kind regards

Luka

 

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Bartłomiej Gemalto Moderator's picture
Bartłomiej Gema...
Sep 13 2022 - 1:19pm

Hello,

I'm afraid that entering an AT command is the only way that you have. You should prepare it earlier and just paste at the right moment. And RS232 interface is better that USB as USB needs some time to enumerate while ASC0 is available sooner. Usually this solution works (after some trials).
To avoid it in the future you can also set some autostart delay.

Best regards,
Bartłomiej

cido_felix's picture
cido_felix
Sep 30 2022 - 9:57am

Hi,

I ran into the same issue a while back. I did, what BARTŁOMIEJ suggested, but automated it. I wrote a very short python script that pretty much spams the ASC0 interface with the AT command to disable autostart. After a few reboots, the script fired in the exact moment when the module was able to receive AT commands, but the faulty application wasn't running, yet.

import serial
import time

ser = serial.Serial('/dev/ttyUSB0', 460800)
while True:
    ser.write(b'at^scfg=\"Userware/Autostart\",\"\",\"0\"\r')
    print(str(ser.read(10)))
    time.sleep(0.01)

Just adjust the device identifier and the baudrate to your needs.

I hope this helps.

Kind regards

Felix

Bartłomiej Gemalto Moderator's picture
Bartłomiej Gema...
Sep 30 2022 - 3:46pm

Hi Felix,

Thank you for your input! Script is a good idea, especially when the manual way fails.

BR,

Bartłomiej

aaronramsdale's picture
aaronramsdale
Jun 2 2023 - 9:43am

Hello Luca,

You may need to think about other approaches if your module is stuck in an endless boot loop and you are unable to stop the autostart feature using the standard AT commands because of the frequent restarting. fnf