longwires

Software bitbang I2C and 1-Wire library for long-distance wiring

Features

• Pure software bitbang – No hardware I2C/1-Wire peripheral needed
• Wide I2C frequency range – 1 Hz to 1 MHz+
• Long distance wiring (I've tested 100 meters twisted pair)
• Clock stretching support – Handles slow slave devices with configurable timeout
• Non-blocking DS18B20 – State machine based, doesn't block your main loop
• Fixed-point data – No floating point overhead (optional float support for SHT3X)
• Platform abstraction – Clean separation between core logic and hardware

Supported MCU:

- ESP32 (Xtensa and RISC-V based) 
- STM32F1 

Supported frameworks:

- ESP-IDF
- Platformio

Included drivers:

I2C devices:
    SHT3X
    DS3231
1-Wire:
    DS18B20

how to install

ESP-IDF
idf_component.yml:

dependencies:
  longwires:
    git: https://github.com/ostymate/longwires.git
    version: "main"

Platformio
platformio.ini:

lib_deps = 
    https://github.com/ostymate/longwires.git