MicroPython

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  Convert namedtuple to json for mqtt - thingsboard
  • dbrosy  

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  TEROS 12 and SDI-12
  sdi-12 teros12 • • tttadam  

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  @tttadam I think it because there may be values in the read buffer, which are discarded when you init the device. You could try to call tou.read() to flush the buffer instead of re-initing the UART. if that does not work, it's no big harm. Reestablising the UART does not harm.
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  [SOLVED] UART and MH-Z16 CO2 sensor
  micropython uart mh-z16 • • tttadam  

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  @robert-hh Yep, Thank You! :)
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  MCP3428 I2C Data Errors
  • jmpratt  

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  Great! Thanks for the explanation. It all makes sense now!
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  dfrobot 1602 rgb lcd micropython library
  micropython rgb lcd displays 1602 • • tttadam  

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  ADC and ML-020S-O Lux Sensor
  adc analog read luxsensor • • tttadam  

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  @tttadam If I understand the data sheet right, the orange should go to GND an the white to an Analog input, like P13 to P18. The uncovered one is shielding. You can put that to GND. The output range is small, 0-30mV, which means, that you will get no reasonable reading, because there is no reading at all below ~70mV. The value you read should mostly be 0. So you need to insert an amplifier. Edit: The ESP32 has an built-in amplifier. But that is not supported by the Pycom firmware and not by espressif itself.
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  Camera image over MQTT
  low power • • robmarkcole  

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  @robmarkcole Hi wondering, if you have completed the project. We are also trying to connect camera(with low resolution) to Lopy4 and obtain the still image, convert into ASCII, break down into chunks and send it through LoRa. Would appreciate your guidance on how you did. Thankyou Regards Sonam
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  Modifying boot.py
  • smithclarkson01  

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  Capturing console messages to a log
  console • • BetterAuto  

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  @fsergeys same problem here :-(
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  Math Module log10 cannot be used
  • Terry666  

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  @Terry666 You can derive that from math.log() math.log10(x) = math.log(x)/math.log(10) math.log2(x) = math.log(x)/math.log(2) Since math.log(10) and math.log(2) are constant, you can pre-calculate them. P.S.: Looking at the code, they are not included in the PyCom build. You can do so by building you own firmware and setting #define MICROPY_PY_MATH_SPECIAL_FUNCTIONS (1) in mpconfigport.h.
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  logging for investigating
  • tttadam  

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  @tttadam If you have trouble with fragmentation, you have to redesign your program. Running the garbage collector will not help in all situations and small changes can get you into trouble again. You can reduce fragmentation by using precompiled scripts and allocating huge buffers at early stages. Reinitialize your buffers instead of allocating them each time.
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  Disabling WiFi on LoPy
  • Bettina  

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  There is also pycom.wifi_on_boot method which can be set to False. more info in the Docs
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  json over mqtt and json in general
  • tttadam  

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  @robert-hh what I see in the docs is ujson, and I think it is very basic. But I will search for some sample code, and write what I come up with. (last year when I checked this topic, there was no support for json in micropython. Or I was lazy when did my research)
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  Communication with other lora device doesn't work
  bugs lora lopy4 feather m0 • • melkoutch  

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  @robert-hh Thanks for clearing this out !
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  I2C Clock Stretching
  • brotherdust  

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  @Colateral I had the same issue with the SCD30. The SCD30 also supports modbus as well as I2C, which is how I got the SCD30 to work with the lopy
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  config file on sd card
  sdcard source-code configuration • • tttadam  

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  Json on the sd is come up to my mind also for config, I will give a try with that. :) I hoped, that there is an easier solution for source code protection, but it seems there isn't. Still thanks for your suggestion.
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  MLX 90614 Sleep mode
  • testuser  

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  1602 LCD and I2C backpack with pycom
  i2c lcd displays 1602 • • tttadam  

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  @Lucas_Vieira I'm missing the print statements form the script. So your test script is not executed at all.
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  urequests and timeout?
  • zmaier  

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  [solved] MQTT and tls
  mqtt ssl tls • • tttadam  

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  I found the issue. I got wrong login name and pass from the client....