PLS62T-W-USB watchdog turning off the module not restarting it? | Telit Cinterion IoT Developer Community
August 18, 2021 - 3:11pm, 1464 views
AUG 18 2021 - 3:05PM
I have a PLS62T-W-USB l am trying to use the watchdog facility for reliability. This module has previously been used by others (as it is a demo unit) but it does not appear to have any non-standard code running.
I have a problem in that when the watchdog is triggered (I have setup the repetitive module reset) the module turns off rather than restarts. If I lower the DTR line on the RS232 interface the module wakes up again, but I cannot do this easily with some of our devices and this is not how the unit should work, as far as I read the documentation.
Is this expected behaviour? Is there some other setting I need to change to get the unit to restart not shutdown?
I did also try setting the Always_ON watchdog setting to force the unit to start up after another watchdog has shut it down but that does not get it back on.
Has anyone seen this or can offer suggestions please?
Hello!
Can you share the commands you are using for configuring the watchdog (as per the below example)?
WD=RST_REP,86400000,18
- command configures the Repetitive Module Reset mode, with a timeout of 86400000 ms (24h)
WD=MIN_START_TIME,18000000,9
- command configures the delay after which watchdog activity starts after module restart, with a timeout of 18000000 ms (30 min))
WD=ON,1,1
-this command enables the watchdog
In the meantime, I'll check if there are any similar known issues in our databases.
Best Regards
Wojciech
Some brand new modems arrived today (now branded Thales) and the watchdog works fine with the same settings. I guess the loaned unit is so old that it has some form of hardware "bug" in respect of the watchdog.
Hello,
Indeed there was some hardware issue in the older versions of the terminals that was causing problems with restarting. I remember some quite recent thread on the forum where this was also discovered. Anyway in the new terminals it should be working fine.
Best regards,
Bartłomiej