Discussion

• J

  Sending data files to cloud storage drive (Google drive/ Amazon S3 etc)
  • JSmith  

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  Sounds promising. Does anyone advise or know of any particular cloud service with a Micropython API for file upload?
• S

  Help with multi client socket threading
  • Sebastian San Martin  

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  @jcaron Thank you very much for your advice, after much thinking and trying out different approaches I decided to not use threads at all, the select/poll library is all what I needed. I'm using this for a wireless sensor network and since there's no Wake on Lan on WiPy 3.0 I figured out a solution in which some devices need to go into deepsleep mode after receiving and forwarding all of the expected data. That's why I needed to wait for all of the connections to have been received so I can continue with the main program. Thank u again :)
• D

  Is WiPy 1.3 compatible with PyGate?
  • Duane Kaufman  

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  @Duane-Kaufman No, it's not. WiPy 1.3 has a different CPU and does not fit mechanically and electronically.
• J

  Xml to json lopy4
  • jose mercader  

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  @jose-mercader it would probably help a lot if you provided the XML you are trying to parse, the error you get, and the code you use. Please don’t forget to format them as code using the </> icon in the toolbar.
• A

  Disabling and Enabling GPS Receiver
  • AM  

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• C

  load cell temperature drift
  • crankshaft  

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  @kjm As far as I understood, they were mostly interested in changes during the day, and could therefore cope with long term drifts; they had to, because the hive itself my change it's weight over time, not only to the changing amount of bees & honey, but also due to humidity etc. Still, an error of <1% is doable. For any long time measurement you will need way more precise devices. But at ~1 USD, you get what you pay for.
• V

  deactivate specific interrupt
  • Valter Roldao  

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  @Valter-Roldao said in deactivate specific interrupt: @robert-hh Thanks! So, that's the routine I'm using already. the question is, can I stop/pause callbacks for one pin, while keeping others active? I did not find how in the documentation (either pycom or micropython's ) thanks my issue has been fixed.
• E

  What is the maximum size (capacity) supported for the SD card?
  sdcard • • Eric24  

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  @livius said in What is the maximum size (capacity) supported for the SD card?: @Eric24 said in What is the maximum size (capacity) supported for the SD card?: It is 32GB - but as described somwhere on the forum it will be increased in the future firmware releases thanks my issue has been fixed.
• A

  Pytrack gps
  • AM  

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  @robert-hh I tested with the gps_standby function it turned off the board and stop the program. Is there any other function that will stop the gps receiver without shutting down the board.
• M

  Noob to Pycom
  • Matthew Felgate  

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  @Matthew-Felgate said in Noob to Pycom: Many question. I try to give a few answers as a user. Which board do you suggest I get to start with? That's linked to your last question about communication. I would recommend LoPy4, which allows dealing with LoRa networks (TTN, Sigfox), BLE. Why don't Pycom boards have USB? That's partially history. The ESP32 chips has no built-in USB support. External FTDI board consume quite a bit of current, which is bad for battery operated devices. So Pycom decided to split that. The new expansion boards have a USB/UART bridge by Pycom, which can be powered down. The could have integrated that in newer development modules, but these would not be pin compatible any more. New ESP32 chips will have integrated USB. Then the picture may change. Pytrack, Pysense, Expansion board which one should I get to connect my board? Depends on your project. Could I use an FTDI board to connect and save money on an expansion board? Yes. You need one with 5V power output, while TX and RX are at 3.3V level. Pycom boards seem expensive, why is that? Quality. Is there a standalone IDE or command line too for Pycom boards? There is pymakr by Pycom, many other IDE and command line tools. Also basic tools like a VT100 terminal emulator and a ftp client like FileZilla will do. Can you update code over-the-air to Pycom boards? I see this in the documentation. There is the PyBytes management environment by Pycom, which allow to configure and update your devices remotely. As with all super perfect IDE and Environment, as long as it runs they are fine. If there is a problem, they may get obstacles. Is telnet/FTP/Wifi enabled by default? or will I need an extension board to set up the board first time? Can't remember. It could be that PyBytes is enabled by default. Someone else (@gijs) might tell, how uses recently off-the-shelf devices. I guess MicroPython is Python for microcontroller boards. Does that mean python libraries I find on the internet will work in MicroPython? Due to the limited resources of the boards, most libraries for CPython will not work. But there are many libs available for MicroPython through github and upip. Do you have to worry about library sizes? Yes. It seems Pycom boards are good for network communications. As a noob which is easiest to try first: LoRa, SigFox BLE or LTE? If you look at the forum, people seem to have more trouble with LTE than with LoRa. Both option depend on the service being available at your place. Pycom offers a SIM for LTE. That may help with LTE. For LoRa, TTN is usable without any access barrier.
• A

  This topic is deleted!
  • AM  

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• 

  Pycom firmware types
  • PB123  

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  @jcaron that's probably cleaner than directly messing in the config :) thanks!
• T

  Can RX be used on read only pin?
  • troy salt  

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  @troy-salt Yes.
• E

  Disconnect power lines
  • ecabanas  

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  @ecabanas You cannot use P0, because that one is the RX pin of the UART0. Use another pin.
• P

  What do I misunderstand about rgbled()?
  • Paul Holthuizen  

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  @robert-hh And precise enough to create the timing signals for a WS2812! I remember writing a piece of C-code for a PIC microcontroller controlling a whole string of these leds and wrestling with that for a bit. Thanks for your support. I was getting a little bit frustrated with the lopy on my bench but am starting to realize now that the difficult bit here is not in the networking but in the way a high-level language like Python interfaces with low level hardware. Just more stuff to learn :-)
• A

  Pytrack 2.0 - antenna selection
  • Andrew Long  

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  development.pycom.io is outdated for now and we are looking into new ways of keeping both up to date. For now, all relevant information will be on docs.pycom.io
• E

  Having problems to connect to LTE
  • ecabanas  

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• K

  raw lora packets multiple of 5 bytes?
  • kjm  

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  @robert-hh Unreal Rob! I'm used to artefacts (mainly missing events) on a DSO due aliasing but I haven't had a lot of experience with spectrum analysers. This experience of seeing frequencies that aren't really there is bothersome. But then any instrument beyond a ruler is probably measuring not what you are interested in but some other metric supposedly indicative of what you are interested in, so anomalies are only to be expected I guess. Really interesting that the artefacts vanish at zero IF. I might get myself a HackRF1 as a Christmas present & see what it has to say about side lobes as a function of bytes sent from the SX1272/1276. Regardless of lobes/no lobes lora is pretty impressive. I ran a swept frequency source over the top of a raw lora link here on the bench & the link ploughed on regardless. I'm sure if I fiddled the timing I could break the link but I don't much see the point. Thnx to you & jcaron for your contributions these last few years, always constructive & enlightening.
• V

  This topic is deleted!
  • Valter Roldao  

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• S

  Reset Board using the RST Pin in case it gets stuck
  • SciWax  

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  Thank you for the advise. I wish I would be an engineer sometimes. Okay, a direct connection between a Digital Pin of a 5V Arduino and the RST Pin of a Pycom board is alright, when you set that Digital Pin of the Arduino as an Input. It's also okay, when you set this Digital Pin of the Arduino as an Output for a short amount of time to make the RST Pin Low, but never set that Digital Pin of the Arduino HIGH or otherwise you get in trouble (the RST Pin wont like that). An example code snippet from Arduino Code for pulling the RST Pin LOW, if anybody has the same goal: if ((millis() - WDstartMillis >= WDperiod) && barkRec == true) { Serial.println(F("Bite! Watchdog reset!")); pinMode(RSTGPyPin, OUTPUT); // sets Pin LOW automatically delay(1); digitalWrite(RSTGPyPin, LOW); // supposedly not needed delay(1); pinMode(RSTGPyPin, INPUT); // GPy gains control back barkRec = false; }