nrf52840-i2c-scanner/README.md

nRF52840 DK I²C Scanner

Quick and simple program to scan for used I²C addresses on an (nRF52840 DK)[https://www.nordicsemi.com/Products/Development-hardware/nRF52840-DK].

Setup

Connect I²C as follows:

GND -> GND
VCC -> VDD
SDA -> P0.03
SCL -> P0.04

Software

Either use nix and enter the dev shell with nix develop or ensure that at least the following is installed:

• rust
• probe-rs

Attach the dev-kit with USB, turn it on and run probe-rs list to verify the connection. It should show something akin to the following:

The following debug probes were found:
[0]: J-Link (J-Link) (VID: 1366, PID: 1051, Serial: 001050288663, JLink)

Run cargo run to compile the software and flash it. The resulting output will tell you at which addresses I²C devices were found.

Example output with a device at 0x27

0.014221 INFO  i2c device at 0x27