Talk to the IMU: I2C and your first sensor data

TheoryfreeTheory lesson: the video explains the idea. No code in this lesson.

TheoryfreeTheory lesson: the video explains the idea. No code in this lesson.

STM32freeWe continue the project from chapter 1 (printf over USART2 already works), enable I2C1 and read the identity register of the IMU.

ESP32freeThe same as 2.3, now on the Arduino Nano ESP32 with the Wire library. No CubeMX: Wire.begin() sets up I2C on the default pins.

TheoryfreeTheory lesson: the video explains why the library is built this way; this page shows each part.

STM32freeWe move the IMU code out of main.c into a driver for our chip. The driver only uses three board functions (read, write, delay), given through function pointers. main.c provides them with HAL (lesson 2.6). Using another IMU? Take its two files from the steps below instead of ism330dhcx.h / .c: the rest is the same.

STM32freeCopy each step into main.c, at the place shown above the code. Keep everything between the USER CODE comments.

ESP32freeThe driver files from 2.5 work on the ESP32 without a single change. We only write the three board functions with Wire, then start the sensor and read it at 50 Hz with the loop from 1.5.