GPy

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  This topic is deleted!
  • htwg  

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  Gpy bricked after adding Pybytes firmware
  • nakovi  

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  @nakovi Fixed this by using the erase all feature from: https://docs.pycom.io/advance/cli/ A little heavy handed but the board seems to be back to normal. I'm pretty afraid to touch pybytes again though. Time to look into alternative for uploading data.
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  GPy LTE Modem does not respond
  • nakovi  

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  @kjm Yep, LTE antenna. I finally got a connection to go through. Only thing I changed is to remove my lines specifying bands (4, 12, 13) so it may have been happier with another band. To anybody that finds this post down the road, this is what I added to the LTE example documentation code to get it to work: lte = LTE() lte.send_at_cmd('AT^RESET') lte.send_at_cmd('AT+CFUN=0') lte.send_at_cmd('AT+CEREG=2') lte.send_at_cmd('AT!="clearscanconfig"') lte.send_at_cmd('AT+CGDCONT=1,"IP","hologram"') lte.send_at_cmd('AT+CFUN=1') lte.attach()
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  Mqtt subscribe stops receiving
  • gt1  

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  Sockets with LTE and W-LAN
  • htwg  

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  pulses_get holding buffer values?
  • pycom9  

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  @pycom9 pycom.pulses_get() has no means of managing what it is doing. It uses the RMT device. So you could try to use the RMT module API, allowing to deinit and init the channel again. That may reset the internal ringbuffer of the RMT peripheral.
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  GPy refuses to LTE attach after running for months
  • curtis.hendrix  

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  @curtis-hendrix Gee that's a bit scary, I'm running 41065 on my GPY modems too. Modem updating seems to be a bit of a stumbling block for pycom. When I asked them why I can't get a copy of the 43818 modem firmware in my latest GPY purchase for my other GPYs they said it was because they're still testing the upgrade packages. One thing I've learned about the monarch modems is they have a lot of sensitivity to the 3v3 rail. I've lost 2 modems from when I was powering the GPY via USB. It took a while for me to realise that the frequent resets we were experiencing were from dips in the 3v3 rail when the sqns tried to transmit. Since we've been running our GPYs from a LiPo we haven't had any more power related resets & haven't had any more modem failures.
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  GC auto or not?
  • kjm  

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  Dear @kjm, @kjm said in GC auto or not?: We continue to play whack-a-mole with GPY lte connection stability. As we eliminate problems we are left with more obscure errors (eg OSError: [Errno -29312] MBEDTLS_ERR_SSL_CONN_EOF). These resources might give you some clues: https://github.com/espressif/esp-idf/issues/1009 https://github.com/espressif/esp-idf/issues/3624 https://github.com/espressif/esp-idf/issues/4127 I am really encouraging you to give the Dragonfly firmware [1] a try as it already fixes some of the problems outlined within those issues, especially the PSRAM bug. With kind regards, Andreas. [1] https://community.hiveeyes.org/t/dragonfly-firmware-for-pycom-esp32/2746
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  Gpy without Pymakr
  • Don-iot  

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  @Don-iot As said, that seems only to be a problem when using one of the various pycom expansion boards. I'm using Fipy and Lopy boards on a homebrew expansion board without a pull-up resistor at P8. The issue seems to be caused by the PIC on Pycom's expansion board, which pulls P2 low when the device is powered by battery and the PIC is not powered. If then P8 stays low since it has an internal weak pull-down, the device does not boot.
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  Dumb Atom question
  • kjm  

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  tnx fellas shift-ctrl-C does the trick in Atom under Windows10
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  Pycom firmwares question
  • kjm  

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  Has anyone got a contact inside pycom? I really want to know why the sqns 43818 firmware in my latest gpy isn't available for download somewhere?
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  Identify GPY FS?
  • kjm  

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  @robert-hh said in Identify GPY FS?: pycom.bootmgr()[1] tnx Rob, bootmgr tells me the 1.20.0.r4 firmware was done with LittleFS. The updater.py looks intimidating. Isn't there something I could type on the cmd line in Atom that would erase just the userland flash now that we know it's LittleFS?
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  python glitch
  • kjm  

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  @robert-hh Interesting. The GPY modem gets itself into a state where it says it's connected but can't run data. Trying to disconnect it to reset it gives an OSError so I do a machine.reset(). Can you suggest any tricks to maybe restore the modem without a machine.reset()?
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  OSError 23
  • kjm  

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  This topic is deleted!
  • Skipper90  

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  GPy + Pytrack startup connection issues
  • jchernandez  

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  @jchernandez Hi, I came across the same problem just now and managed to solve it: For me, the problem first occurred after I accidentally disconnected a GPy and PyTrack from USB. The GPy would work with the PWR_EN removed, like yours. Other board and shield combinations would work, too. What resolved the problem was re-flashing the pytrack firmware from the dfu file. Now everything works again without pin modifications!
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  • pycom9  

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  GPY sequans catch 22
  • kjm  

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  Finding it hard to track down, happens one in fifty lte.connect() for me. I got a hunch maybe the telco tower was cutting the lte connection due weak signal or something & this was maybe putting the lte modem into zombie mode(can't be disconnected/reset). Tried a dummy load on the lte antenna socket in lieu of an antenna so see if this would increase the occurrence rate. What do you know -121dBm & got a server responses no problem. Sigh. Look on the bright side I guess. At least the lockup clears with a machine.reset() & we don't need a power cycle to fix it.
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  Persistent flash problems with littleFS in 1.20.1.r1
  • kjm  

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  @jcaron I misunderstood the 'syntax error in Json' message. I thought it was referring to a syntax error in the json library we import but I now realise it was referring to the json packets from the server that library decodes. I think my problems are down to the lte getting into a state where it reports connected but can't run data. It seems my only option to fix this is a machine.reset() since trying to reset the modem fails with an OSError (because it thinks its in a data state) and I can't disconnect it (with a view to resetting it) because that gives an OSError too.
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  GPY full flash erase
  • kjm  

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  I don't think pycom would refuse to promote pybytes as there entry into service business.