ESP32 Flash and Ram
ESP32’s Flash memory is an external SPI-based storage that serves multiple purposes: This external SPI-based storage IC is embedded within the ESP32 module and enclosed by a metal…
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Ultrasonic Sensor HC-SR04
Overview An ultrasonic sensor is an electronic device used to measure distance or detect objects by emitting ultrasonic sound waves and analyzing the echoes that return. These sensors…
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Project – Distance Measurer
In this project, we will build a distance measurer that can measure distances up to 4 meters using the HC-SR04 Ultrasonic Sensor and ESP32. Wiring Diagram Arduino Code…
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Bluetooth Classic Serial Server
Here’s a simple ESP32 Bluetooth Classic example that demonstrates how to set up an ESP32 as a Bluetooth Classic Serial Server. This example uses the Bluetooth Serial library…
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ESP32 Preferences
The ESP32 Preferences library provides a simple and efficient way to store key-value pairs in the ESP32’s non-volatile storage (NVS), making it ideal for saving small amounts of…
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Read Value
The following example creates a BLE server with a single service and characteristic. The characteristic can be read by a connected BLE client. Steps: Code: Explanation: How to…
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Using Preferences
The API for Preferences is simple and easy to use. Here’s a breakdown of the typical operations: 1. Include the Preferences Library: 2. Create a Preferences Object: 3….
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Write Value
This example will set up the ESP32 as a BLE server with a writable characteristic. The value written to the characteristic will be printed in the serial monitor….
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LittleFS
LittleFS (Little File System) is a lightweight file system designed for microcontrollers and embedded systems. It is an alternative to SPIFFS (SPI Flash File System) and is often…