https://github.com/codesqueak/pi_pico_bme280
A demonstration project on how to talk to a device on the I2C bus. This uses microPython on the Pi Pico with a BME280 Temperature Humidity Pressure Sensor
https://github.com/codesqueak/pi_pico_bme280
Last synced: 7 months ago
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A demonstration project on how to talk to a device on the I2C bus. This uses microPython on the Pi Pico with a BME280 Temperature Humidity Pressure Sensor
- Host: GitHub
- URL: https://github.com/codesqueak/pi_pico_bme280
- Owner: codesqueak
- License: mit
- Created: 2021-01-31T19:25:33.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2021-02-03T20:32:21.000Z (over 4 years ago)
- Last Synced: 2023-08-05T11:13:41.978Z (almost 2 years ago)
- Language: Python
- Homepage:
- Size: 112 KB
- Stars: 7
- Watchers: 2
- Forks: 1
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Raspberry Pi Pico with BME280 Sensor
A small project to demonstrate how to talk to a device on the I2C bus without third party libraries.
This uses microPython on the Pi Pico with a BME280 Sensor.
The BME280 is an environmental sensor capable of measuring temperature, pressure and humidity
## Setup
Attach the sensor to the Pi Pico as shown below
Pi Pico | Pin | BME280
------ | ------- | -------
GP0 | 1 | SDA
GP1 | 2 | SCL
GND | 3 | GND
3V3(OUT) | 4 | 2-6V
## Code
The [code](main.py) is in a style to aid understanding rather than being production ready. For example:
* The calculations are presented as close to the examples in the datasheet as possible
* Constant values are re-read on each run instead of being stored
* No checks for sensor existence or readiness are included
* Lots of output !
## Example Output
```
i2c devices found at
0x76
Sensor data
0x88: 66 6F B8 69 32 00 B0 92
0x90: BA D6 D0 0B F1 19 DC FF
0x98: F9 FF AC 26 0A D8 BD 10
0xa0: 00 4B 79 00 00 00 00 00
0xa8: 00 00 00 00 33 00 00 C0
0xb0: 00 54 00 00 00 00 60 02
0xb8: 00 01 FF FF 1F 4E 08 00
0xc0: 00 40 6F FF 00 00 00 00
0xc8: 03 00 00 00 00 00 00 00
0xd0: 60 00 00 00 00 00 00 00
0xd8: 00 00 00 00 00 00 00 00
0xe0: 00 74 01 00 12 28 03 1E
0xe8: 00 41 FF FF FF FF FF FF
0xf0: FF 00 03 0C 6F 00 00 55
0xf8: EE 40 82 2F 80 6A E1 80
Temperature is 24.43 degrees
Pressure is 980.704 mbar
Humidity is 47.62598 %
```
## Useful Links
The [BME280](https://shop.pimoroni.com/products/bme280-breakout) sensor used
Bosch [datasheet](https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bme280-ds002.pdf) for the sensor
## Coffee
If you find this project useful, you may want to [__Buy me a Coffee!__ :coffee:](https://www.buymeacoffee.com/codesqueak) Thanks :thumbsup: