https://github.com/bjoernq/i2c-dummy-device

ESP32-C3 as I2C dummy device
https://github.com/bjoernq/i2c-dummy-device

Last synced: 25 days ago
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ESP32-C3 as I2C dummy device

• Host: GitHub
• URL: https://github.com/bjoernq/i2c-dummy-device
• Owner: bjoernQ
• License: apache-2.0
• Created: 2023-01-31T17:05:34.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2024-07-23T07:33:00.000Z (about 2 years ago)
• Last Synced: 2025-10-07T09:56:17.038Z (10 months ago)
• Language: Rust
• Size: 16.6 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE-APACHE

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README

          
# i2c-dummy-device on ESP32-C3

## What is this?

This simulates an I2C device via bit-banging.

It ACKs on all 7-bit addresses and returns the data `b"012345678901234567890123456789"` for every register.

The code is intentionally not fancy - it's not even using interrupts.

When using it with e.g. an SSD1306 display driver you *need* to disable the console output. (`VERBOSE`) - also always run in release mode.

SDA is on GPIO 1, SCL is on GPIO 2.

Additionally it can simulate clock-stetching by changing `CLOCK_STRETCH_DELAY_US`

If it doesn't work you might need to add external pull-up resistors.

This is really just for testing purposes - it might crash or act weird in many ways.