GPy

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  New GPY - LED Faulty
  • tlanier  

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  @Gijs Here's a couple of things that have come up while reading the docs. Shouldn't the function signature be: pycom.pybytes_on_boot([boolean]) This function call does not exist in OS version 1.20.2.r4.
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  i have a problem with deepsleep in my gpy,the code below DUMP
  • Eugenio Bubba  

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  @Eugenio-Bubba Do you mean core dump? And also show software version: print(os.uname()) add also print('deepsleep') statement before machine.deepsleep() to see if core dump is after going to sleep
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  pycom-fwtool: unusable language/font
  • Elizar  

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  No one has replied

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  GPy 1.0 extremely low RSRP of -21474836.00, no LTE connectivity
  • Laurin Schmidt  

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  Please could you add the modem firmware you're using and which network (NB-IoT or CAT-M1) you want to attach to. Moreover, the Simcard provider / network and band would be interesting to add as well. Did you try moving locations or testing outside, and check the coverage map by the provider? There is troubleshooting guide available here: https://docs.pycom.io/tutorials/networks/lte/#lte-troubleshooting-guide Let me know
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  How to handle a LTE Connectivity loss
  • SciWax  

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  Hi, Yes, a non-polarized cap would be best. You want to remove any (high-frequency) switching noise using the capacitor. It should also work without one, though you might have issues with debouncing in extreme cases.
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  new board
  • Calvin Foo  

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  ok got it working. use the pycom firmware update, install 1 version before the latest one... tried with VS code, then connection ok. then use pycom firmware update, and install the latest version. tried with VS code, working ok too. problem resolved.
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  LTE + WLAN... and MicroWebSrv2 = hang?
  • techykermit  

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  Does it always stop working at that line? Did you try without WLAN, or changing the order to see if it works? Could you try lte = LTE(debug=True) to see additional debug information? And lastly, you could check the free memory using this function: def memory(): machine.info() print("GC free=", gc.mem_free(), "alloc=", gc.mem_alloc(), "total=", gc.mem_alloc() + gc.mem_free()) # micropython.mem_info() print("mp stack", micropython.stack_use()) print("heap internal", pycom.get_free_heap()[0]) print("heap external", pycom.get_free_heap()[1]) With the appropriate imports Let me know!
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  LTE support for Telia and Telenor (Norway)
  lte nb-iot telia cat-m telenor • • Jardar  

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  Hi, Yes I will work on your request tomorrow, sorry for the long delay, you caught me in between tasks Gijs
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  EMC/RF testing - spurious noise around 6.4GHz
  • E W  

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  @livius Haha :) The noise is only present when the GPy is in the testing room. We tested just the GPy attached to the expansion board in the room to make sure it could have only been the GPy.
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  EMC/RF testing of the GPy LTE Cat M1 modem
  • E W  

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  Result: The testing facility had equipment to simulate a base station inside the testing room and provided us with a special SIM which connected to it (on LTE band 20 - 800MHz). We could then use our normal MicroPython code to send a ping lte.send_at_cmd('AT!="IP::ping 8.8.8.8"') or send data over a socket connection.
• G

  Reliable LTE Reconnection
  • grpatt  

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  (2)That is odd a deep sleep for is needed to fix the modem uart. Hopefully we can find a more clean way to reconnect the modem. In the past, I have had to reflashed the firmware on the modem to solve the problem. I'll try to implement the deep sleep to solve my problem but it seems like there is a better solution.
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  LTE-M packet size
  • Thomas Thomas  

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  The MQTT library should work fine over LTE (we use it in Pybytes as well), though it seems the address resolver cannot find your mqtt server. the EAI_FAIL (Error Address Information) is caused by the DNS lookup failing, unrelated to the MQTT protocol.
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  Wakeup pins missing from wakeup reason
  • techykermit  

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  @techykermit how you wire looks like? If you simply use this pin not connected then you got this behavior If you connect it to GND by wire you will see pin in wake_reason(). If you have e.g. button wired to this pin you must look at debounce. Add e.g. 100nF ceramic capacitor should fix problem.
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  LTE NB - IOT (Telenet - Belgium)
  • carl declercq  

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  @carl-declercq Best of luck, let me know if you need any further help!
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  Telia LTE-M Sweden
  lte lte-m lte m1 telia sweden • • hammerfet  

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  @hammerfet have you had success at this lately? Just getting started with lte and will try telenor and telia.
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  sequans verbose/diagnostic
  • kjm  

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  @kjm Just ran into the SQNINS=0 issue myself; I get the same output whether 0 or 1 is specified for full or fast scanning. Can anyone provide insight into this?
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  GPy IP Address
  • pauldeng  

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  @kjm Thanks a lot. print(lte.send_at_cmd('AT+CGCONTRDP')) works! It gives +CGCONTRDP: 1,5,"telstra.internet.xxx.yyy.gprs","10.247.zz.gg.255.255.255.255","","10.4.hh.ii","10.5.jjj.kk","","" 10.247.zz.gg is the local ip address. Sad it is not public ip. Cheers, Paul
• M

  Error starting modem connection
  • Massimo Rebellato  

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  Hi, Could you let me know of the output with lte =LTE(debug=True), that way, we can verify the AT commands. Also be sure to verify the power supply capabilities, as the LTE modem might consume more current than expected Could you also let me know of the following output: import sqnsupgrade sqnsupgrade.info(debug=True) This will return a coredump at the end, please do not copy that over, but only the text at the top. Let me know, Gijs
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  WiFi AP
  • nadvorvo  

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  @Gijs said in WiFi AP: I looked at this for a long time, but then figured it out Hi @Gijs I really appreciate the support you’ve given me. I have testes, everything all right. Regards, Vojtech
• S

  Use accelerometer to put module to sleep.
  • Steven Owen  

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  What happens after you call py.go_to_sleep(), is the Pytrack coprocessor cuts off the supply power to the microcontroller. This is the lowest power sleep state available. On the accelerometer wake, the coprocossor switches the power back on, meaning the Gpy will boot up as if it was just plugged in (starting with boot.py and continuing in main.py). If you have a pytrack 1, you do not have to use the workaround provided in the link I posted. The suggestion to wait 10 minutes is because sometimes you have to wait for traffic lights and such, where you do not want to turn off the tracker. I would take the inactivity interrupt (which follows the activity interrupt, when the movement is on the falling edge) from the accelerometer, and note down the time. Then, in the main loop check that time against the current time and see if the 10 minutes have passed. If so, go to sleep and make it wake on accelerometer. You'll have to set the sensitivity just correct that it does not wake up on small movements of entering and exiting the caravan, but that it does trigger on driving it on the road I presume.