# An incomplete driver for the HZ Grow R502 fingerprint reader module
Uses `embedded-hal` and `arrayvec`. It's not intended to be a complete implementation of the
R502 command set but rather enough for a simple fingerprint verification device.
## Progress
- [x] **VerifyPassword** Performs a handshake with the device
- [x] **ReadSysPara** Reads system status information
- [x] **GenImg** Captures a fingerprint image
- [x] **Img2Tz** Converts an image into an internal fingerprint representation
- [x] **Search** Searches for fingerprints in the library
For more, see the [projects](https://github.com/FLamparski/hzgrow-r502/projects).
## Examples
Some examples are meant to be run on a full PC rather than an embedded device. Use
a serial to USB converter at 3.3V power and logic levels. I recommend the ESP-PROG.
## Contributing guidelines
If you want to send a PR, please make sure that your changes work on a real R502 (if your changes
modify anything in the driver itself). For issues, do a cursory check to see if a similar issue
has already been filed.
Please follow Rust's [code of conduct](https://www.rust-lang.org/policies/code-of-conduct).