GPy

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  getaddrinfo in a thread
  thread gettaddrinfo • • kjm  

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  Is this guy for real?!
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  Read the Sensor data through AWS cloud using GPY
  • LindaJackson  

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  GPy Hardware Version
  • tlanier  

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  @tlanier There's at least a difference in band support: https://forum.pycom.io/topic/4869/band-support-for-gpy-and-fipy Not sure if it's really related to an actual hardware change, or just a different version of some non-field-upgradable modem firmware. Not sure whether there are any other changes either.
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  Terminating a thread after 5s
  thread timeout • • kjm  

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  LTE_WAKE and waking from network activity like SMS
  gpy gpio lte m1 sms wake • • psychogenic  

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  @dan Any updates on this issue? Seems like their hasn't been much change in the documentation.
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  Improved Initialize LTE
  • tlanier  

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  GPy+LTE+MQTT+io.adafruit.com
  • shutterspark  

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  Gpy wont attach to LTE but Fipy does
  • newmicropython  

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  @jcaron I am so sorry about that. It is my first time to use the forum. I will create a new thread. Thank you for reminding me.
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  GPY rogue safe mode reboots
  • kjm  

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  @robert-hh Not seeing evidence of a corrupted file system Robert, all nvs.sets and error.log files are OK. Just boot.py & main.py have been rebuilt to the 'put-your-code here defaults'. Might actually skip the imports & simply have 2 independent copies of the user code at boot.py & main.py Just checked the code, we don't actually close files, we use 'with open' which does not require file closure. Is that OK? What if I'm wrong & boot.py & main.py have been rebuilt due file system corruption. Is there a way of dealing with this?
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  Servo Motor Issues
  • shanefowler25  

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  I solved my own problem, I realized the frequency was too high and that the duty cycle should be between 5 and 10 percent. I used Sparkfun's PWM page to help me get this information and solve my issue. The link is here: https://learn.sparkfun.com/tutorials/pulse-width-modulation/all Also my code is here for anyone who may run into the same issue with a servo motor: from machine import PWM from time import sleep pwm = PWM(0,frequency=50) # use PWM timer 0, with a frequency of 50Hz pwm_c = pwm.channel(0,pin='P8', duty_cycle=1) while True: pwm_c.duty_cycle(0.097) sleep(1) pwm_c.duty_cycle(0.043) sleep(1) pwm_c.duty_cycle(0.097)
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  Can't get my GPy to work
  • Alonso21  

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  @Alonso21 This is a little bit vague. Please tell us the firmware version you are using. You get that, when you push Ctrl-B in the REPL prompt (= terminal window) of the device. Also please tell us the LTE modem firmware version. You will get that by typing (or pasting) these three commands at the REPL prompt: from network import LTE lte=LTE() print(lte.send_at_cmd('AT!="showVersion"')) And please tell us, which software you try to use. Did you have a look at the examples in the pycom documentation? https://docs.pycom.io/tutorials/lte/
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  Warning To All Visual Studio Code / Pymakr Extension Users
  • tlanier  

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  Another issue with Pymakr was discovered yesterday. If you install Visual Studio Code on a newly installed Windows 10 and add the Pymakr extension, it will not communicate with the GPy until Node is also installed on the computer.
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  Calling machine.reset from timer interrupt routine
  • tlanier  

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  I think we have discovered the problem with our code! I was initializing a global variable by calling the constructor but the constructor would throw an exception (very rarely). lte = LTE() Since there was no try/except around the global code and since the watchdog had not been initialized yet, the exception would break the startup code from running and freeze the system. The lesson learned is NEVER put any code in the global variable declarations that might throw an exception! lte = None ##################################################################### # Reset Modem ##################################################################### def reset_modem(): global lte g.modem_state = g.MS_RESET_MODEM log("reset modem...") if lte == None: try: lte = LTE() except Exception as ex: sys.print_exception(ex) util.reset(27, "LTE exception") sleep_ms(0) lte.reset() sleep_ms(0)
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  GPY pin voltage tolerance
  • shanefowler25  

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  @robert-hh Thank you for the response! I'm going to buy a level shifter from sparkfun and use that for my project. Hopefully that works out for what I'm trying to do and doesn't damage the board.
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  valid values for lte = LTE(carrier="xxx")?
  • poesel  

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  Thanks all! Question answered.
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  Is it possible to program the GPy without the expansion board?
  • Dinali_S  

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  @Dinali_S Here is GPy Pinout Diagram
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  CAT-M1 cannot Attached
  • Terry666  

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  @Terry666 Can you try to set the timeout to a much larger value? For the first time, that may be needed.
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  LTE-M stability
  • lewis  

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  lte OSError
  gpy oserror • • kjm  

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  Cell TAC
  tac • • kjm  

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