MicroPython

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  Digital Signatures / ECC
  • mki64  

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  Import of variables from boot.py
  boot.py • • alidaf  

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  @PeterB I'm not using the pymakr plug-in, but form the discussion i recall, that there is an option to run safe boot before upload. Safe boot bypasses boot.py and main.py. In that case the objects defined in boot.py to not exist.
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  Sending sensor data to server using LoRa
  fipy lora pysense • • Archana Kadam  

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  @Lonefish Do you actually have a valid IP connection between the FiPy and the server? The topic of the subject talks about LoRa, but you can't perform HTTP requests over LoRa, you need to go through a gateway for that.
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  How to use "libpcre" on the Pycom MicroPython runtime?
  • andreas  

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  Hi again, we resolved this issue and it is easy to tackle if you know what has been happening to make things go south. So, let me explain. When installing micropython-urllib.parse with upip, this obviously pulls in all package dependencies. One dependency, the package micropython-re-pcre brings in the re.py module along with ffilib.py as a utility module to be able to talk to libpcre. However, all of this is not available on the Pycom platform, but Pycom itself ships a built-in re package, which would have worked right away when not being masked by the vanilla re.py shipped through micropython-re-pcre. So, we manually remove re.py and ffilib.py from the dist-packages folder before uploading the firmware using rshell. Then, urllib will use the built-in re.py module and everything works like a charm. Sorry for the noise and happy hacking, Andreas. P.S.: If you are interested in what we are building here, you are welcome to have a look at the Hiveeyes MPY data logger firmware. We'd love to hear about any feedback and suggestions you might have.
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  I2C Clock Stretching
  • brotherdust  

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  @abilio Do you have an update on clock stretching issue. There is also a new sensor SCD30 (from Sensiron) that face the same clock stretching issue. We can not see device address 0x61 on the BUS bus(0) on (P22, SCL=P23) nor bus(1) on (P9, SCL=P8). Sensor works fine ESP32 (arduino dev) Any workaround for this on pycom?
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  while True and serial/telnet connectivity
  • cmisztur  

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  @robert-hh Thank You. mqtt_client_lock = _thread.allocate_lock() def mqtt_check_msg_thread(client,lock): while True: try: #utime.sleep(1) with lock: client.check_msg() except OSError: print('MQTT failed to check_msg') with lock: if client.connect() != 0: utime.sleep(1) except: print('MQTT check_msg thread failure') def mqtt_setup(): global mqtt_client global l99_serial is_mqtt_connected = False with mqtt_client_lock: mqtt_client = MQTTClient(l99_serial, '192.168.2.107', 1883) mqtt_client.set_last_will('L99/{}/io/state/offline'.format(l99_serial), '', qos=1) mqtt_client.set_callback(mqtt_output_command_callback) is_mqtt_connected = mqtt_client.connect() == 0 if is_mqtt_connected: #Timer.Alarm(handler=mqtt_check_msg, ms=1000, arg=None, periodic=True) on_mqtt_connected(True) else: on_mqtt_connected(False) if is_mqtt_connected: _thread.start_new_thread(mqtt_check_msg_thread, (mqtt_client, mqtt_client_lock))
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  Communicate with Thingsboard using UMQTT
  iot send data umqtt • • brossingo  

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  @brossingo what was the output if the program when you ran it? Checking the return value of client.connect() might yield useful information.
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  lora.stats(), ACK packet
  • justin  

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  @jcaron Many thanks for the detailed explanation. Very helpful.
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  socket timeout
  gpy lte socket hologram • • brett  

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  Exceptions in micro python
  micropython exceptions • • kjm  

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  Thnx again Robert, for anyone else with a similar requirement I ended up with.... except Exception as e: import sys; from uio import StringIO s=StringIO(); sys.print_exception(e, s) s=s.getvalue(); s=s.split('\n') line=s[1].split(','); line=line[1]; error=s[2]; err=error+line; print(err) with open ('error.log', 'a') as f: f.write(err)
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  OSError: -29312
  oserror urequests • • kjm  

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  Where did you get the urequests library from? You'll need to check the source code and search for that error code.
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  How to display last traceback
  error exception traceback • • alexpul  

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  @crumble Not a bad work around! Thanks for your help.
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  External SD Card
  sd card • • Manju2391  

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  @edward-dimmack That should work. I'm using this wiring on my homebrew interface boards.
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  data consumption
  fipy gpy lte data consuption • • mp  

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  weird behaviour with function
  python • • misterlisty  

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  @misterlisty The second error is from another call somewhere inside your function (line 852 of main.py).
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  Pycom + Azure IoT Hub SDK
  micropython pycom library azure • • fedonman  

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  [QUESTION][BOTTLE][FLASK][DJANGO] About web frameworks and SD
  sd card webserver flask django bottle • • nervencid  

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  You can try something like this: https://github.com/jczic/MicroWebSrv looks like the author explicitly supports pycom modules. (Please note this isnt an official pycom recommendation. I've never used it. we dont support the library. I just found it in my travels and thought it might be usefull) @jczic if you happen to stumble across this. Good work. Look's like a neat project!
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  wlan.isconnected() always False in AP mode.
  fipy bug ap mode • • akshayjames  

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  @dan, how did you fix this problem? Would you please post the code on both devices that you used? I am running in to the same issue. Thanks
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  WDT Reset, RTC also reset
  gpy micropython pycom rtc watchdog • • serafimsaudade  

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  This topic is deleted!
  • cirobr  

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