WEEK 4: Embedded Programming
Assignment
1. About ESP32 Microcontrollers and data sheet.
2. Simulate using TinkerCAD and test on the development board Arduino UNO.
About ESP32
ESP32 is a single 2.4 GHz Wi-Fi-and-Bluetooth combo chip designed with the TSMC low-power 40 nm technology. It is designed to achieve the best power and RF performance, showing robustness, versatility and reliability in a wide variety of applications and power scenarios.
The functional block diagram of the SOC
Features
The ESP32 Dev Kit is a development board based on the ESP32 microcontroller, providing easy access to its
features and functionalities. Key specifications include:
1. Microcontroller: ESP32-WROOM-32
2. Operating Voltage: 3.3V
3. Input Voltage: 5V via USB
4. Flash Memory: 4MB
5. GPIO Pins: 38 (varies by model)
6. Communication Interfaces: UART, SPI, I2C
7. PWM Channels: Available on multiple GPIOs
8. ADC Channels: Up to 18 (12-bit resolution)
9. DAC Channels: 2 (8-bit resolution)
10. Wi-Fi Standards: 802.11 b/g/n
11. Bluetooth: BLE 4.2 + Classic
12. USB-to-Serial Converter: CP2102 or CH340G
PinOut
ESP32 DEVKIT
Assignment Program
Objective
To measure the distance of an object using an ultrasonic sensor with an ESP32 microcontroller. The implementation includes programming in both Arduino IDE and Python, with simulation conducted in Wokwi and Thonny.
WOKWI
Wokwi is an online simulator for embedded systems, allowing users to prototype and test microcontroller-based projects without physical hardware. It supports various microcontrollers like ESP32, Arduino, and Raspberry Pi Pico, along with components like sensors, displays, and motors. Wokwi provides a virtual environment where users can write and debug code, simulate circuits, and visualize data in real-time, making it ideal for learning, testing, and rapid prototyping.
Simulation in WOKWI
1. Open Wokwi.(https://wokwi.com/)
2. Select ESP32 as the microcontroller.
3. Connect the ultrasonic sensor and assign the respective GPIO pins.
4. Upload the Arduino IDE code and monitor the serial output.
Python Program to find the distance of the object using ultrasonic sensor(HC-SR04)
CIrcuit Diagram
Simulated Output using Pyhton and Arduino IDE code
Roll Count Detection System Using Ultrasonic Sensor and ESP32
This project uses an ultrasonic sensor with an ESP32 to count the number of paper rolls stored in a cupboard. The sensor measures the distance to detect the presence of rolls, and based on the readings, the total count is determined. The detected roll count is then displayed on a 16x2 LCD screen for easy monitoring. The ESP32 processes the sensor data and updates the count in real-time, ensuring accurate inventory tracking.Wokwi is an online simulator for embedded systems, allowing users to prototype and test microcontroller-based projects without physical hardware. It supports various microcontrollers like ESP32, Arduino, and Raspberry Pi Pico, along with components like sensors, displays, and motors. Wokwi provides a virtual environment where users can write and debug code, simulate circuits, and visualize data in real-time, making it ideal for learning, testing, and rapid prototyping.
Video
Download Code Files
Click on the links below to download the program files:
Python