![]() In these cases, the ESP32 is the master chip and the external devices are the slaves. We use this protocol many times with the ESP32 to communicate with external devices like sensors and displays. multiple masters controlling the same slave: for example, two ESP32 boards writing data to the same I2C OLED display.multiple slaves to one master: for example, your ESP32 reads from a BME280 sensor using I2C and writes the sensor readings in an I2C OLED display.I☬ means Inter Integrated Circuit (it’s pronounced I-squared-C), and it is a synchronous, multi-master, multi-slave communication protocol. ![]() Introducing ESP32 I2C Communication Protocol ![]()
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