In this lesson, we will use the Espro Board to make an object follow project.
Hardware:
Espro Robot Control board
Chassis and motor system same as lesson 1
Two IR object sensors
Pre-Connected GPIO pins between ESP32 and I/O devices
| L293 Pin |
ESP32 GPIO |
Function |
| IN1 |
23 |
Motor A Direction 1 |
| IN2 |
25 |
Motor A Direction 2 |
| IN3 |
26 |
Motor B Direction 1 |
| IN4 |
27 |
Motor B Direction 2 |
| ENA |
16 |
Motor A Speed (PWM) |
| ENB |
17 |
Motor B Speed (PWM) |
Ultrasonic Sensor Slot
| Object Sensor |
VCC |
GND |
Left Out |
Right Out |
| ESP32 GPIO |
3V3 |
GND |
GPIO 15 |
GPIO 14 |
Software Installation Guide:
Step 1)Install ESP32 Arduino Board
Connect the Espro Board to Desktop or Laptop computer with Type-C USB cable.
In Arduino Setting->Preference, please copy and past following link into Board Manager Url field:
https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
After you select OK, then in Tool->Board->board Manager, Search ESP32 and Add ESP32 into Board Manager.
then in Tool->Board, select esp32 ->ESP32 Dev Module
Then Select correct port which matches ESP32 board.
Step 2) Download Correct Sample Code and Upload to Arduino.
Sample Code:
https://github.com/osoyoo/espro_objectfollow/blob/main/objectfollow.ino
| Left Sensor |
Signal |
VCC |
GND |
| Espro GPIO |
15 |
3.3V |
GND |
| Right sensor Pin |
Signal |
VCC |
GND |
| Espro GPIO |
14 |
3.3V |
GND |
