# Exporter for the MightyOhm Geiger Counter [![status-badge](https://ci.onders.org/api/badges/finga/mightyohm-gc-exporter/status.svg)](https://ci.onders.org/finga/mightyohm-gc-exporter)
A Prometheus exporter for the [MightyOhm Geiger Counter](https://mightyohm.com/blog/products/geiger-counter/).

## Build
Cargo, the Rust package manager, is used to build this project.

### Same architecture as system
Compile it for the same architecture as the build system:
```sh
cargo build --release
```

### Cross-compile for amd64 (recent RaspberryPi)
Cross-compile it for the amd64 architecture:
```sh
PKG_CONFIG_SYSROOT_DIR=/usr/aarch64-linux-gnu cargo build --target aarch64-unknown-linux-gnu --release
```

## Debian
To build a package for Debian, Raspbian, and so on,
[`cargo-deb`](https://crates.io/crates/cargo-deb) can be used.

The package comes with an automatically started and enabled systemd
service unit which can be configured via
`/etc/default/mightyohm-gc-exporter`.

### Same architecture as system
Build a `deb` package for the same architecture as the build system:
```sh
cargo deb
```

### Cross-compile for amd64 (recent RaspberryPi)
Build a `deb` package for the amd64 architecture:
```sh
PKG_CONFIG_SYSROOT_DIR=/usr/aarch64-linux-gnu cargo deb --target aarch64-unknown-linux-gnu
```

## Usage
```
USAGE:
    mightyohm-gc-exporter [OPTIONS]

OPTIONS:
    -a, --address <ADDRESS>            The IPv4 or IPv6 address where the metrics are served
                                       [default: 127.0.0.1]
    -b, --baud-rate <BAUD_RATE>        The baudrate of the serial connection [default: 9600]
    -h, --help                         Print help information
    -p, --port <PORT>                  The port where the metrics are served [default: 9111]
    -s, --serial-port <SERIAL_PORT>    The port of the serial device, usually in '/dev/...'
                                       [default: /dev/serial0]
    -t, --timeout <TIMEOUT>            Timeout of the serial connection in ms [default: 1000]
    -V, --version                      Print version information
```