Need Help: ESP32 C3 MINI-1 I2C Setup

Concode
Posts: 1
Joined: Fri Jul 11, 2025 9:29 am

Need Help: ESP32 C3 MINI-1 I2C Setup

Postby Concode » Fri Jul 11, 2025 9:42 am

Hello, I use the ESP32-C3 Mini-1 module to implement the BMI270 sensor and I²C communication.

Environment
Board: ESP32-C3 Mini-1 (N4) Module
Firmware Framework: ESP-IDF V5.4.2
Sensor: BOSCH BMI270 (I²C address 0x68)
+ SCL/SDA Pull-up Resistor 10k

when i initialize the i2c, unexpected nack detected..
Can I use GPIO8 and GPIO10 with I2C SDA/SCL?

I refer to the following for schematic
https://github.com/esp-rs/esp-rust-board

in that schematic, they use gpio10 and gpio8 for scl/sda

yuan3041
Posts: 1
Joined: Sat Jul 19, 2025 12:00 pm

Re: Need Help: ESP32 C3 MINI-1 I2C Setup

Postby yuan3041 » Sat Jul 19, 2025 12:27 pm

I used GPIO8 and GPIO9 with I2C SDA/SCL. it was working well.

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