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Deepsleep error when working with LTE module #616

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VincBont opened this issue Sep 7, 2023 · 3 comments
Open

Deepsleep error when working with LTE module #616

VincBont opened this issue Sep 7, 2023 · 3 comments

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@VincBont
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VincBont commented Sep 7, 2023

  • Working on Gpy with Pyscan dev board

  • Firmware version : (sysname='GPy', nodename='GPy', release='1.20.2.r6', version='v1.11-c5a0a97 on 2021-10-28', machine='GPy with ESP32', pybytes='1.7.1')

I try to run a simple script where I initialize the LTE module, attached it to the network, connect it to the data stream, disconnect it from this data stream, detach the LTE module from the network and finally send the board to a deep sleep. The deep sleep is working well without the LTE code and the LTE code is running correctly. But as soon as I perform LTE action before a deep sleep, the board crash and reboot.

My code:

import machine
from network import LTE

_lte = LTE()

def attach_lte(lte):
    if not lte.isattached():
        print("Attaching to LTE network ", end='')
        lte.attach(apn="sunrise.internet", type=LTE.IPV4V6)
        while(True):
            if lte.isattached():
                print(" OK")
                break
            print('.', end='')
            time.sleep(1)
    if not lte.isconnected():
        print("Connecting on LTE network ", end='')
        lte.connect()
        while(True):
            if lte.isconnected():
                print(" OK")
                break
            print('.', end='')
            time.sleep(1)

try:
    _lte.reset() # reset LTE module
    print("OK")
    time.sleep(1)
    attach_lte(_lte) # attach LTE module to the network and connect to data stream
    print("LTE work")
    _lte.disconnect() # disconnect LTE module from the data stream 
    print("OK")
    time.sleep(1)
    print("Detaching LTE ... ", end='')  
    _lte.dettach() # detach LTE module from network
    print("OK")
    time.sleep(5)
    print("Sleep mode...")
    machine.deepsleep(1000*10) # enter deepsleep mode for 10 sec
finally:
    print("Finished")

Complete output logs:

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:1
load:0x3fff8020,len:8
load:0x3fff8028,len:2128
load:0x4009fa00,len:19760
entry 0x400a05bc
Smart Provisioning started in the background
See https://docs.pycom.io/smart for details 
UART init...
Init...
OK
Attaching to LTE network ........ OK
Connecting on LTE network  OK
LTE work
OK
Detaching LTE ... OK
Sleep mode...
Guru Meditation Error: Core  1 panic'ed (LoadProhibited). Exception was unhandled.
Core 1 register dump:
PC      : 0x400ff376  PS      : 0x00060130  A0      : 0x800e7f53  A1      : 0x3ffd89c0
A2      : 0x00000000  A3      : 0x00000001  A4      : 0x00000000  A5      : 0x00000009
A6      : 0x00008000  A7      : 0x8000ffff  A8      : 0x3f40f410  A9      : 0x3ffd8990
A10     : 0x00000000  A11     : 0x00000000  A12     : 0x3ff56960  A13     : 0x00000000
A14     : 0x3ffde6d4  A15     : 0x00000001  SAR     : 0x0000001e  EXCCAUSE: 0x0000001c
EXCVADDR: 0x00000000  LBEG    : 0x400ece1c  LEND    : 0x400ece5f  LCOUNT  : 0x00000000

ELF file SHA256: 0000000000000000000000000000000000000000000000000000000000000000

Backtrace: 0x400ff376:0x3ffd89c0 0x400e7f50:0x3ffd89e0 0x400e57b8:0x3ffd8a00 0x40101a26:0x3ffd8a30 0x400fddb5:0x3ffd8a60 0x400fde45:0x3ffd8a80 0x40109e13:0x3ffd8aa0 0x40101ac0:0x3ffd8b40 0x400fddb5:0x3ffd8bc0 0x400fdde2:0x3ffd8be0 0x400e1311:0x3ffd8c00 0x400e15b5:0x3ffd8ca0 0x400e0020:0x3ffd8cc0

================= CORE DUMP START =================
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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
TL/9P7C9/T9Ev/0/
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BQAAAEiv/T9Tb2NrZXQgT3BlcmF0aW8AAQAAAES//T8AAAAAIQAGAAUAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAADUZPs/PGX7P6Rl+z8AAAAAAAAAAAEAAAAAAAAA
soZAPwAAAACENwlAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAALrjZQ==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================= CORE DUMP END =================
Rebooting...

I do not understand this behavior, a bit of help will be appreciated.
Thank you!
@jonnerd154
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LTE.dettach() is non-blocking, but takes a significant amount of time. Try adding a polling/wait loop after your call to dettach() and before the sleep call, that checks LTE.isattached(), and breaks out of the loop when it's false.

@jonnerd154
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Follow up: I think you also need to call LTE.deinit() after the detach.

Quick example of the whole thing:

# Detach with state check
if _lte.isattached():
    detachTimeoutN = 0
    _lte.dettach()
    while detachTimeoutN < 10:
        if not _lte.isattached(): 
            break

        utime.sleep_ms(1000)
        detachTimeoutN += 1

# de-initialize the LTE module
_lte.deinit()

@VincBont
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That was a good idea but sadly the error still persists even though I correctly detach and deinit the module.

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@jonnerd154 @VincBont