tarnak

ESP32 as Bluetooth Keyboard

With its built-in Bluetooth capabilities, the ESP32 can act as a Bluetooth keyboard. The below code is a minimal example of how to achieve it. It will generate the key strokes for a message whenever a button attached to the ESP32 is pressed.

For the example setup, a momentary button should be connected to pin 2 and to ground. Pin 2 will be configured as an input with pull-up.

In order to receive the message, add the ESP32 as a Bluetooth keyboard of your computer or mobile phone:

Go to your computers/phones settings
Ensure Bluetooth is turned on

Comparison table for ESP8266/ESP32/ESP32-S2/ESP32-S3/ESP32-C3/ESP32-C6

A minimal table to compare the Espressif's MCU families.

	ESP8266	ESP32	ESP32-S2	ESP32-S3	ESP32-C3	ESP32-C6
Announcement Date	2014, August	2016, September	2019, September	2020, December

	#include <SPIFFS.h>

	/*
	*
	* Copyright (C) 2017 CS.NOL https://github.com/csnol/1CHIP-Programmers
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 3 of the License,
	* and You have to keep below webserver code

	@echo on
	REM checked for Windows 10
	REM fork from https://gist.github.com/theultramage/cbdfdbb733d4a5b7d2669a6255b4b94b
	REM you may want full list https://gist.github.com/raspi/203aef3694e34fefebf772c78c37ec2c

	REM SET attrib=+ATTRIB_HIDE
	SET attrib=-ATTRIB_HIDE

	REM Hard disk burst ignore time
	powercfg -attributes 0012ee47-9041-4b5d-9b77-535fba8b1442 80e3c60e-bb94-4ad8-bbe0-0d3195efc663 %attrib%

	// Espressif ESP32 promiscuous mode and packet injection experiments
	// by brainstorm at nopcode org

	#include "freertos/FreeRTOS.h"
	#include "esp_wifi.h"
	#include "esp_wifi_internal.h"
	#include "lwip/err.h"
	#include "esp_system.h"
	#include "esp_event.h"
	#include "esp_event_loop.h"

	#include <IRremote.h>

	#define NO_IR 0
	#define NO_BTN -1
	#define IR_REPEAT 0xFFFFFFFF
	#define IR_SEND_MODE 1
	#define IR_STORE_MODE 2
	#define BUFSIZE 128

	typedef struct {