Tag archive for: ESP32

How to write a C# program to communicate with an ESP32 development board via Bluetooth Serial

Coupled with Bluetooth Serial and GPIO pins, ESP32 can augment a Windows machine with the ability to read from sensors.

So with an ESP32 development board, you can turn your old Windows machine into an IOT gateway that can sense its operating environment.

Given these points, let us look at how we can write a C# program to communicate with an ESP32 development board via Bluetooth Serial.

How to connect to an ESP32 development board via Bluetooth on your Mac

When you are trying to build a ESP32 project that uses Bluetooth to receive from or send data to another device on Mac, you may want to use your Mac to connect to your ESP32 board to test Bluetooth connectivity.

In this case, you will need to first connect your Mac with the ESP32 development board via Bluetooth.

So how can you do that?

In case you need it, this is how to connect to an ESP32 development board via Bluetooth on your Mac.

How to use C# to read sensor data from Arduino or ESPx via serial connection

When you have an old Windows machine, you can convert it into an IOT gateway.

So how can we read sensor data with our windows machine? Since our windows machine probably do not have GPIO pins, we can read sensor data via an intermediary device.

For example, we can first attach an Arduino Uno or ESP32 development board as the intermediary device to our windows machine via USB. Given that connection, the intermediary device will read the sensor data and send those values via serial. On our Windows machine, we can then run a program to read those values from serial.

So how can we read sensor data from Arduino or ESPx via serial connection on our Windows machine? Since C# is a programming language for creating windows application, we can use C# to read those data from serial.

Enabling ESP32 Development on Arduino IDE

When you want to implement a low cost IOT solution with bluetooth interface, you can consider using a ESP32 development board. In addition to the bluetooth interface, the ESP32 development board also includes a WiFi interface.

In order to run a program on the ESP32 Development Board, we will need to write our program into the flash memory of the development board. Since it is easy to write code and flash programs with Arduino IDE, it is a good tool to use with the ESP32 Development Board.

In case you need it, this post shows how to enable ESP32 development on Arduino IDE.