Thanks @MicroController! This did the trick. :D For reference, this is what it looks like now: reg_and_data[0] = reg_addr; std::memcpy(&(reg_and_data[1]), reg_data, length); esp_err_t error = i2c_master_transmit(_instance->_device_handle, reg_and_data, length + 1, -1); As an old Java dude this C byt...

I am currently trying to communicate with a BME680 sensor over I2C using the newest Bosch API and ESP IDF 5.3. I found some very old code which seems to work but uses the API provided by driver/i2c.h. Since it is recommended to use the newer API driver/i2c_master.h I try to rewrite the code but havi...

I am using an ESP32-C3-DevLit-M1 and try to speak to a sensor via I2C. In order to do that I create a new I2C master bus using esp_err_t i2c_new_master_bus(const i2c_master_bus_config_t *bus_config, i2c_master_bus_handle_t *ret_bus_handle); imported from i2c_master.h. When I call this function the l...

I am fairly new to the IDF framework and encountered problems with everything newer than 5.0. Currently I am working with an ESP32C3 dev module and trying some display stuff over SPI. Under IDF v5.0 I got the simple spi_lcd_touch example working like a charm. I had to plug in my GPIOs, build and fla...