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# 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:

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

GluTbl

Node MCU pinmap

D0- GPIO16
D1- GPIO5
D2- GPIO4
D3- GPIO0
D4- GPIO2
D5- GPIO14
D6- GPIO12
D7- GPIO13

GluTbl

import time
from time import sleep

from pynput.mouse import Listener,Button, Controller

mouse = Controller()
def on_move(x, y):
    global p1
    p1=mouse.position
    return False

GluTbl

import com.pi4j.system.SystemInfo
import java.io.BufferedReader
import java.io.IOException
import java.io.InputStreamReader
import java.net.InetAddress
import java.net.ServerSocket
import java.net.Socket
import java.text.ParseException

GluTbl

/* 
* i2c_port_address_scanner
* Scans ports D0 to D7 on an ESP8266 and searches for I2C device. based on the original code
* available on Arduino.cc and later improved by user Krodal and Nick Gammon (www.gammon.com.au/forum/?id=10896)
* D8 throws exceptions thus it has been left out
*
*/

#include <Wire.h>

GluTbl

class player():
    def __init__(self):
        self.is_initiated = False
        self.SEEK_TIME = 20
        self.MAX_VOL = 512
        self.MIN_VOL = 0
        self.DEFAULT_VOL = 256
        self.VOL_STEP = 13
        self.current_vol = self.DEFAULT_VOL

GluTbl

#!/bin/bash


if [ $# -ne 1  ]
then
   echo "Invalid arguments"
   exit
fi

re='^[0-9]+$'

GluTbl

import pyaudio
import socket
from threading import Thread

frames = []

def udpStream():
    udp = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)    

    while True:

GluTbl

#!/bin/bash

POSITIONAL=()
while [[ $# -gt 0 ]]
do
key="$1"

case $key in
    -t|--time)
    TIME="$2"

GluTbl

#!/bin/bash

#Detect the name of the display in use
display=":$(ls /tmp/.X11-unix/* | sed 's#/tmp/.X11-unix/X##' | head -n 1)"
#Detect the user using such display
user=$(who | grep '('$display')' | awk '{print $1}' | head -n 1)
#Detect the id of the user
uid=$(id -u $user)