https://github.com/cptpiepmatz/rg-15-flipper

🐬 FAP for the rain gauge RG-15.
https://github.com/cptpiepmatz/rg-15-flipper

fap flipper-zero flipper-zero-app rain-gauge rg-15

Last synced: 2 months ago
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🐬 FAP for the rain gauge RG-15.

• Host: GitHub
• URL: https://github.com/cptpiepmatz/rg-15-flipper
• Owner: cptpiepmatz
• License: mit
• Created: 2024-10-11T11:31:20.000Z (7 months ago)
• Default Branch: main
• Last Pushed: 2024-12-08T18:05:31.000Z (5 months ago)
• Last Synced: 2025-03-08T20:57:03.085Z (2 months ago)
• Topics: fap, flipper-zero, flipper-zero-app, rain-gauge, rg-15
• Language: Rust
• Homepage:
• Size: 3.72 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
rg-15-flipper



  

    Flipper Zero app (FAP)

    for the

    RG-15 rain gauge.

  








  [![Version](https://img.shields.io/badge/dynamic/toml?url=https%3A%2F%2Fraw.githubusercontent.com%2Fcptpiepmatz%2Frg-15-flipper%2Frefs%2Fheads%2Fmain%2FCargo.toml&query=package.version&style=for-the-badge&label=Version&color=orange)](https://github.com/cptpiepmatz/rg-15-flipper)

  [![API Version](https://img.shields.io/badge/api_version-sdk_73-blue?style=for-the-badge)](https://github.com/flipperdevices/flipperzero-firmware/tree/1.0.1)

  [![License](https://img.shields.io/github/license/cptpiepmatz/rg-15-flipper?style=for-the-badge)](https://github.com/cptpiepmatz/rg-15-flipper/blob/main/LICENSE)



## About

`rg-15-flipper` is a custom

[FAP](https://developer.flipper.net/flipperzero/doxygen/apps_on_sd_card.html)

for interacting with the

[RG-15 rain gauge](https://store.hydreon.com/RG-15.html) by

[Hydreon](https://store.hydreon.com).

Built in [Rust](https://www.rust-lang.org), it uses the 

[flipperzero-rs/flipperzero](https://github.com/flipperzero-rs/flipperzero)

Rust bindings.

Many thanks for that 🦀❤️🐬.

The app reads sensor data via TTL serial (though the manual refers to it as 

RS-232 at 3.3V) and sends commands to control the sensor's behavior.



  





  



For further instructions, check the 

[manual](./docs/2022.07.18-rev-1.000-rg-15_instructions.pdf) in the `docs`

directory.

## Installation

1. Install the [Rust toolchain](https://www.rust-lang.org/tools/install).

2. Add the `thumbv7em-none-eabihf` target:

    ```sh

    rustup target add thumbv7em-none-eabihf

    ```

3. Build the FAP:

    ```sh

    cargo build --release

    ```

The built binary will be located at

`./target/thumbv7em-none-eabihf/release/rg-15-flipper.fap`.

Use the [qFlipper](https://flipperzero.one/update) app to copy it to your 

Flipper's SD card.

Connect the sensor to the Flipper, ensuring GND is connected first.

![wiring](./docs/wiring.png)

## The RG-15

![rg-15](./media/sensor.webp)

For FAQs, refer to 

[Hydreon's FAQ page](https://rainsensors.com/support/rg-9-rg-15-faq/).

An interesting feature of the RG-15 is it's non-volatile memory, which stores

settings like:

- Baud rate

- Precision

- Continous vs polling mode

- Metric vs imperial units

- Total rain accumulation

These settings persist after reboot.

The J2 port has a memory clear (MCLR) pin, though I don't know whether you need 

to pull it high or low to clear the memory.

## License

Licensed under the MIT License. 

See [LICENSE](./LICENSE) for details.

## Forking

This FAP was primarily developed to test the sensor and as a learning exercise. 

I don’t plan to continue development, so feel free to fork the repo and make 

changes as needed.