Cellular radio firmware release (SQN3330) for both Cat-M1 and NB-IoT

[vigmeister]

@daniel FWIW I seem to have run into exactly the same symptoms as @nathanh If and when a resolution is found, I would appreciate if you post it here. I would also not mind getting in on the debugging action if that would help.

[vigmeister]

@daniel @nathanh Additional hint from my observation. I looked at the TX buffer of the serial interface by inserting s.wait_tx_done(5000) after the s.write("ATE0\r\n") line in sqnsupgrade.py and I get "False" as the response. Will try moving downstream in the sqnsupgrade.py code later in the day and share my findings.

[vigmeister]

I tinkered a bit further and by setting the default timeout to 2000 instead of 20000 in sqnsupgrade.read_rsp , I was able to get my FiPy to get further along, but ran into @bali ‘s issue of AT+SMSWBOOT=3, 0 failed!

Looks like the issues are roughly the same, but that @nathanh and I have unstable REPL on top :/

[kevin]

Same issue here, failing with "AT+SMSWBOOT=3,0 failed!" (full log is below). If/when this issue is resolved, please post the details here.

[IOAg]

@nathanh Hi, were you able to recover FiPy at the end?

[nathanh]

@ioag said in Cellular radio firmware release (SQN3330) for both Cat-M1 and NB-IoT:

@nathanh Hi, were you able to recover FiPy at the end?

Nope, @daniel asked me to send my unit back.

I tried to reload the actual Pycom firmware back onto it hoping that might reset the entire device and only made it worse, I can't event load the device now, REPL just shows un-ending loops of flash errors when I turn it on.

[kevin]

Update on my issue: I found that AT^RESET was required after flashing the board with new FW, and before attempting the sqnsupgrade procedure. After that, the upgrade seems to have completed successfully.

[vigmeister]

@kevin Thanks for sharing progress! I tried the same on the FiPy. I was able to keep the REPL alive until the AT^RESET command was sent (using uart.write() ), but no dice. Still stuck with the same symptoms.

[kevin]

@vigmeister Sorry it did not resolve your upgrade issue as well. Just fyi, I used the lte library to send the AT command from REPL:

>>> from network import LTE
>>> lte = LTE()
>>> lte.send_at_cmd('AT^RESET')

Probably doesn't make any difference though.

[cssmacs01]

@daniel I need some help here to see if my devices are bricked. I attempted to update the cellular radio firmware and it was taking a realllllyyyyyy long time to reset so I CTRL+C and now all my AT+cmds are Errors. How do I get back online?

[cssmacs01]

@cssmacs01 .....addtional information. I've gone through the code line by line and manually sent the AT CMDS through UART and it all works up until AT+SMUPGRADE and then it errors. Feels like the two devices I got from Digi-key are bad or I'm missing something.

[nathanh]

@cssmacs01 Just looking at your output there (and maybe I am reading it incorrectly), but are you sure you have the right firmware file because a) you were able to save it onto the flash and load it from there (and I thought it was too big hence needing the SD card) and it is only reporting the size of around ~780k vs the ~5.4mb that it should be.

[cssmacs01]

@nathanh Yes sir! For so much of my night I wasn't able to mount the SD, so that's why I went that route. I just finally mounted and it's transferring 5.5megs. Cross fingers!

[cssmacs01]

@nathanh You think I'm good?

[nathanh]

@cssmacs01 Still looks like you got something odd happening there but interesting that it states your version to be the latest... Guess this is one for the @administrators to comment on.

[micksta]

@nathanh

2 cents worth, used fileZilla and had a similar problem trying to transfer the upgrade ~5.4mb file. Would only transfer 786432 bytes (20 seconds ish) before timing out and closing the connection. So wrote part file only! - Fix for me was to mount card-folder (/sd) using script via serial REPL console, then use fileZilla (via wifi connection) to write entire 5.4mb file (to /sd path).

---- Script I used ----

from machine import SD
import os
import time
import gc

sd = SD()
os.mount(sd, '/sd')

#check the content
os.listdir('/sd')

#found this helps with NOT SHUTTING down Link after 20-30 Seconds, used filezilla while this was running to upload file

xx = 1
while xx < 40:
print('Going to sleep')
time.sleep(5) # in seconds
print('waking up')
print(str(xx))
xx += 1

os.unmount('/sd')
gc.collect()

[tealbrains]

@kevin Thanks, that fixed it.

[flo242]

@daniel

I seem to have run into an unrecoverable problem while trying to upgrade the modem with the latest CAT-M1 firmware (it had the stock firmware, no previous upgrade yet). I wanted to try NB-IoT, so I followed the instructions to first upgrade to the latest CAT-M1 firmware before flashing the NB-IoT firmware. I was using Pysense (firmware pysense_0.0.8.dfu) and FiPy (firmware 1.17.3.b1), connected via serial. No SIM card was inserted, because in my first try it caused the modem to not accept the initial AT+SMSWBOOT=3,0 command to enter the recovery mode.

>>> import sqnsupgrade
>>> sqnsupgrade.run('/sd/FIPY_GPY_CATM1_33988.dup', 921600)
<<< Welcome to the SQN3330 firmware updater >>>
Entering recovery mode
Resetting..
..
Starting STP (DO NOT DISCONNECT POWER!!!)
STP started
Session opened: version 1, max transfer 8192 bytes
Sending 5665583 bytes: [########################################] 100%
Code download done, returning to user mode
Resetting (DO NOT DISCONNECT POWER!!!).
......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/flash/lib/sqnsupgrade.py", line 129, in run
  File "/flash/lib/sqnsupgrade.py", line 59, in wait_for_modem
KeyboardInterrupt:
>>>
>>> from network import LTE
>>> lte = LTE()
>>> lte.send_at_cmd('AT')
''

After waiting almost 5 minutes there was no hope that it would ever finish, and after CTRL-C the modem didn't reply anymore. After a hard-reset I also can no longer create an LTE object, it just sits there forever. Obviously I am unable to retry the firmware upgrade since the modem doesn't respond anymore, what other options are left?

Thanks in advance!

[tealbrains]

@flo242 Have you tried a "safe boot"?

[flo242]

@tealbrains Since I ran out of other options I even tried Safe-Boot but as expected it didn't revive the bricked modem (the FiPy itself works without any problem).