eil/i2cdev
uploaded 5 months ago

ESP-IDF I2C master thread-safe utilities

readme of i2c_scanner example

                                        
                                        # I2C bus scanner

## What it does

This example scans the i2c bus in a loop and prints out a table with the addresses of the found i2c devices.

## Wiring

Connect `SCL` and `SDA` pins to the following pins with appropriate pull-up
resistors.

| Name | Description | Defaults |
|------|-------------|----------|
| `CONFIG_EXAMPLE_I2C_MASTER_SCL` | GPIO number for `SCL` | "5" for `esp8266`, "6" for `esp32c3`, "19" for `esp32`, `esp32s2`, and `esp32s3` |
| `CONFIG_EXAMPLE_I2C_MASTER_SDA` | GPIO number for `SDA` | "4" for `esp8266`, "5" for `esp32c3`, "18" for `esp32`, `esp32s2`, and `esp32s3` |

## Example output

Three devices found on a bus: 0x38, 0x60 and 0x77

```
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- 38 -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- 77
```

                                    

Supports all targets

Maintainer

  • Ruslan V. Uss <unclerus@gmail.com>

License: MIT

To add this component to your project, run:

idf.py add-dependency "eil/i2cdev^1.5.1"

or download archive

Dependencies

  • eil/esp_idf_lib_helpers >=1.2.1
  • ESP-IDF >=4.3
  • Examples:

    i2c_scanner

    more details

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    eil/i2cdev version: 1.5.1 |