A driver crate for the AHT20 Temperature and Humidity modules/sensors.
The library is written in rust using TDD and making heavy use of the
embedded-hal-mock crate to mock away the dependency on i2c hardware.
This crate is made by referencing the C code and multiple versions of the data sheets, as there is a v1.0 and v1.1 data sheet available along with various other data sheets with varying formatting and info.
There seems to be some translation mistakes in the data sheets from what I can tell so I've made some assumptions where needed.
CRC stuff One version of the datasheet seems to describe a 8bit CRC check being used for the readings that come from the sensor.
The polynomial described is 0x31 and an initial value of 0xFF. This sounds
like the CRC-8-MAXIM. So that is what this driver uses.
This assumes you are not in the midst of using this repo as a git-submodule.
If you are then you may need to specify the target for your development
machine using the rustup target list command to find the correct target.
cargo test- Upgrade to newest embedded-hal/mock
- Setup CRC8 for i2c
- Build out the methods to read sensor data.
- Update to poll for finished CRC calculations from sensor.
- Add documentation for recomendations of i2c reliability.
- Impliment generic standard for sensor info/formatting.
- Reduce the size of the lib.rs file.
- Look into making the driver non-blocking.