Crate hzgrow_r502

hzgrow-r502 is an embedded-hal driver for the HZ Grow R502 (and likely similar) fingerprint module.

This is a work in progress and does not strive to meet all use cases of the device. However, it should cover the basics, and may possibly become a basis for other drivers for HZ Grow and similar modules, provided that the suppliers of those use a rougly similar API.

Example

To authenticate with the R502:

let (mut tx, mut rx) = serial.split();
let mut r502 = R502::new(tx, rx, 0xffffffff);
 
match r502.send_command(Command::VfyPwd { password: 0x00000000 }) {
    Ok(reply) => println!("Reply: {:#?}", reply),
    Err(err) => panic!("Error: {:#?}", err),
}

Structs

GenImgResult	Result struct for the GenImg call
Img2TzResult	Result struct for the Img2Tz struct
R502	Represents a R502 device connected to a U(S)ART.
ReadSysParaResult	Result struct for the ReadSysPara call
SearchResult	Result struct for the Search call
SystemParameters	System status and configuration.
VfyPwdResult	Result struct for the VfyPwd call

Enums

Command	Commands that one can send to the R502. Command naming and some field names are taken from the R502 datasheet.
GenImgStatus	Enum for the GenImg status code
Img2TzStatus	Enum for the Img2Tz status code
PasswordVerificationState	Enum for the password handshake result
Reply	Responses to commands returned by the R502. Names are the same as commands.
SearchStatus	Enum for the Search status code