https://github.com/rhubarbdog/microbit-dht11

a DHT11 class for microbit
https://github.com/rhubarbdog/microbit-dht11

assembler dht11 microbit micropython sensor temperature

Last synced: 24 days ago
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a DHT11 class for microbit

• Host: GitHub
• URL: https://github.com/rhubarbdog/microbit-dht11
• Owner: rhubarbdog
• License: mit
• Created: 2018-11-29T00:16:58.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2022-10-03T12:39:40.000Z (almost 2 years ago)
• Last Synced: 2023-03-06T22:49:07.184Z (over 1 year ago)
• Topics: assembler, dht11, microbit, micropython, sensor, temperature
• Language: Python
• Homepage:
• Size: 23.4 KB
• Stars: 5
• Watchers: 1
• Forks: 4
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Lists

• awesome-microbit - DHT11 - Library for for the DHT11 temperature and humidity sensor over 1 wire. (👩‍💻 Programming / 🐍 Python)

README

        
DHT11 - temperature and humidity measurement


This is the code for version 1 microbits and version 2 microbits, version 1 microbits work on pins 0 to 16 inclusive excluding pins 5 and 11 and the is the same for version 2 microbits except they don't also work on pin 16.

on a version 2 microbit for some reason there are a lot of exceptions on reading the sensor, both invald checksum and too few bits, i don't know why this is.

This sensor uses 1 wire for communication, the receipt of bits is written in assembler, it's the only way i could manage to receive all of the data.



There is one user method `.read` this will either return a tuple of valid temperature and humidity data or raise an exception. The only exception to be trapped with a `try:` `except:` block is `DataError`.  The sensor may also raise a `ValueError` for using an unsuitable pin or a general `Exception` if the are issues with the assembler routines.



There is some example code at the end of files `version_1.py` and `version_2.py` ,you need to run a REPL session to see the data output.



The sensor is wired as following :

Pin

13 volts (Vcc)

2Data IO, this needs a 5k

pull up resistor

3Not connected

4Ground