Learn electronics, coding, and projects — step by step.
In this tutorial, we will learn to use the UART peripheral of ESP32 in MicroPython. UART is useful for interfacing devices such as DF Player Mini mp3 player module, SIM800L gsm module, HC-06 bluetooth module, and etc which basically needs serial communication as mode of control. ESP32 has 3 hardware uart serial ports available which […]
In this video, we will learn how to use the HC-SR04 ultrasonic sensor in MicroPython. With ultrasonic sensor, it can be use for measuring distance or it can be use for sensing an object. CIRCUIT DIAGRAM INSTRUCTION Connect the HC-SR04 VCC pin to ESP32 VIN pin. The HC-SR04 needs 5V, trust me I already tried […]
In this tutorial, we will learn to use the DHT22 in MicroPython. DHT11 should be compatible with slight modification. CIRCUIT DIAGRAM INSTRUCTION Connect the OLED VCC pin to 3V3 supply pin of ESP32. Connect the OLED GND pin to ESP32 GND pin. Connect the OLED SCL pin to ESP32 GPIO D22 pin (SCL dedicated pin). […]
In this tutorial, we will learn to use the 0.96 inch OLED display with monochrome display. This is useful for displaying something for the end user. Its easy to use, we just need 4 wires. 2 wires for the power and another 2 wires for the i2c comunication protocol for controlling the display. CIRCUIT DIAGRAM […]
In previous tutorials we learned to use the hardware timer interrupt which is very useful when we need to execute a task at specific interval period. We also use hardware timer interrupts for executing timed threaded task which is similar to multitasking. Using the hardware timer in that manner, sooner or later, we will runout […]