ATOM-DTU-NB-IoT - modem does not respond anymore
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@felmue there is nothing. I also removed and replaced Q3 with Q5. My idea was, that maybe Atom-RX line became output and killed Q3 but that's not the case.
Removing the Q5 completely changed nothing.
I ordered another two modules to check the signals but I start to think the issue is in the modem.
Maybe I come to a point where I should ask the M5 team for help. This is kinda annoying, I really like the design of the DTU.
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Hello @erazor
ok, I see. Yes, I think getting in touch with M5Stack support is probably best.
Thanks
Felix -
@felmue thanks for your hints and your time!
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Hi, can you offer me that code when the modem stopped responding? To see if my DTU will meets the same issue
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Update for anybody who's reading this.
My previous assumption that the reset-button kills the modem seems incorrect.
I've had another two devices and carefully did not use the reset-button at all but these modules also stopped working.
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@forairaaaaa you can find my code here:
https://github.com/erazor83/nb_dtu_reset_issue/ -
i can not use this code, Error:
In file included from N:.....\nb_dtu_reset_issue-main\src\main\main.ino:21:
c:\Users\fb\Documents\Arduino\libraries\TinyGSM\src/TinyGsmClient.h:118:2: error: #error "Please define GSM modem model"
#error "Please define GSM modem model"
^~~~~
exit status 1Compilation error: exit status 1
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Hello @Felix22
please do not use the
nb_dtu_reset_issue
code - it was meant to debug an issue and can change the baudrate of the SIM7020 modem.Thanks
Felix -
@felmue you solve that? Happened with me today, i think after i send a "AT&F" to factory reset the configurations, so now my module stop reply to at commands
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