MicroPython

• Z

  urequests and timeout?
  • zmaier  

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  Andreas is right Martin. I had to resort to a wdt to get around urequest hangs. I tried adding a timeout to urequests, putting urequests in a different thread & setting interrupt timers, nothing worked. Try import urequests; response=urequests.post(your_url, data=payload)
• T

  sending hex via uart
  micropython uart hex • • tttadam  

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  I will write down my issue a little bit more specific. I would like to communicate with an rs485 device over an wsh-4777 converter. With an usb-rs485 and usb uart converter we manage to debug that the issue probarly that the pycom is unable to pull high enough the rse pin on the wsh-4777 converter. If i hook the sensor to a pc via rs485-usb converter then it's work fine. If i hook the pycom board to the pc via an usb-uart converter, then I see the correct hex array If I listen in between the wsh-4777 and sensor, when it hooked to the pycom, then the sensor gets the value, send the answer back, but the pycom didn't received it. (The rs485 device btw is an RT-ZS-BZ-485 noise sensor) this is the code what I am using: p = Pin('P6', mode=Pin.OUT, pull=Pin.PULL_UP) uart = UART(1, baudrate=9600, pins=('P20','P21'),parity=None, stop=1,bits=8) def f(): p(1) utime.sleep_us(50) uart.write(b'\x01\x03\x00\x00\x00\x01\x84\x0A') utime.sleep_us(50) p(0) utime.sleep_us(50) r = uart.read() print("result is: " + str(r))
• P

  Pycom board emulator
  • PG  

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• A

  mqtt with ssl
  • Asb  

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  @Asb I put the full path to the certfile in my config ('certfile':'/flash/cert/ca/pem'}, maybe this helps. André
• V

  I2C output binary to integer
  • Vin883  

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  @Eric73 Thanks a lot!! Yes, goal is to compute int values instead of bytes.
• T

  neopixel and threading
  micropython thread neopixel ws2812b • • tttadam  

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• J

  How to Find Port Number to connect to WiFi Network using socket.connect(). OSError: [Errno 104] ECONNRESET
  pycom wipy3.0 socket wlan oserror • • jc_serg  

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  @jc_serg If you are looking for a ping.py script: there is one here: https://gist.github.com/91cc8979e33e82af6d99ec34c38195fb.git
• B

  variables starting with underscore
  • brauliob  

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  MIcropython works a little different than python. In python you use the underscrore in front of variable to mark the variable as private. Nut it is still visible. In micropython these are real local variables an will not be exported. So a class will have a memory footprint which is slightly lower. The micropython page had this info once under the optimization part. I cannot find it right now. Maybe you have to play around with the version settings in the documentation.
• J

  This topic is deleted!
  • JosephTaylor  

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• T

  best practice for wifi connection
  wifi micropython debug best practices • • tttadam  

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• E

  ESP register access
  • Elizar  

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  @Elizar P20 can be used for the XTAL, but you have to attach it. Otherwise you can use it as normal GPIO pin. You can access the GPIO registers via machine.mem32. hex(machine.mem32[0x3FF44004]) will give you the hex value of the GPIO output register. Writing to it will change the output bits. machine.mem32[0x3FF44008] = 0x10 will set GPIO4 (P3) to high, without affecting the other GPIO pins, if it was configure for output. See the esp32 reference manual for the set of GPIO registers and it's options. Edit: Inline-Assembler or Viper code in not supported by the Pycom dialect of MicroPython
• Q

  cbor orunpack ?
  • quentho  

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  @quentho cbor is not implemented in Micropython. If it is straight python, it may be possible to use it. But if you do not have any compatibility constraints, you can use ustruct.pack() and ustruct.unpack(). You can also use the ujson.dumps() and ujson.loads() methods. But that is an ASCII format, which takes more space than a binary format. P.S.: I just looked into a cbor package from PyPi. It should be possible to port it to MicroPython, but it is quite a bunch of code.
• S

  Getting Static IP From Arduino - Using MicroPython WLAN
  • Sn3akyP3t3  

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  @oligauc Oddly, I'm not getting the option on Android to assign a static IP address. Is there something about this connection's configuration that leads Android to believe that it cannot assign itself a static IP address? I've seen that option before on other networks, but I'm not sure how that option comes and goes.
• Y

  EZO i2c board - Help with converting Python to uPy
  • Yendor  

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  What do you want to do? Which sensors you need? Commercial or private project?
• T

  using c++ libs with micropython
  • tttadam  

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  @tttadam Very good.
• 

  I2C OLED Screen Error
  micropython i2c ssd1306 oled display • • shanefowler25  

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  @kjm All versions have a usable I2C. The case here is a different one, I assume. @shanefowler25 : Can you publish the full error message you got. It should be more than one line. The framebuffer module is included now. It sneaked in when Pycom moved to MicroPython core V1.11.
• T

  noise level meter
  • tttadam  

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  I come up with two solution. use this sensor, and the ADC in the pycom board. and compare the voltage values with a validated noise meter so I can specify which voltage values means which decibel values. simply use this uart sensor Right now option two is more favorable for me.
• P

  BLE - decoding service UUID
  • poesel  

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  Thanks @poesel. We picked that up and wrapped it [1] into two corresponding routines for your convenience: >>> from terkin.network.ble.util import BluetoothUuid >>> BluetoothUuid.from_bytes_le(BluetoothUuid.to_bytes_le('04500100-39fd-49ec-b565-b5d6dc31b6ae')) '04500100-39fd-49ec-b565-b5d6dc31b6ae' You will also find some background information about why that happens within the comments. Thanks also to @jmarcelino for uuid2bytes from [2]. [1] https://github.com/hiveeyes/hiveeyes-micropython-firmware/blob/a8249fd8e9895623de8047ca2d6478dba1351aa8/terkin/network/ble/util.py [2] https://forum.pycom.io/topic/530/working-with-uuid/2
• M

  Any MicroPython fans? Pros? Cons?
  • MazukFarnas  

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  Yes I'm a MicroPython fun, it is a good chose for many use cases. But better to ask it at the MicroPython Forum, it is a pycom board. https://forum.micropython.org/
• C

  Handling WLAN and MQTT disconnects
  • cmisztur  

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  @cmisztur To check if you are connected to wifi you can use the isconnected() as show below from network import WLAN import time class WifiMonitor: def __init__(self): self.conn_timeout = 20 self.wlan = WLAN(mode=WLAN.STA) def _connect(self, ssid, pswd): if not self.wlan.isconnected(): print("Connecting to Wifi SSID: {} PASS: {}".format(ssid, pswd)) self.wlan.connect(ssid, auth=(WLAN.WPA2, pswd)) count_10ms = 0 while count_10ms <= self.conn_timeout * 100 and not self.wlan.isconnected(): count_10ms += 1 time.sleep(0.01) if self.wlan.isconnected(): print("WiFi connected: {}".format(self.wlan.ifconfig())) def connect_loop(self, ssid, pswd): while True: try: self._connect(ssid, pswd) except Exception as e: print("WIFI connection error: {}".format(e)) pass time.sleep(10) WIFI_SSID = 'my ssid' WIFI_PASS = 'my pass' wifi = WifiMonitor() wifi.connect_loop(WIFI_SSID, WIFI_PASS) For MQTT you can send a ping to the MQTT server