Switch a lamp on and off via bluetooth with computer and ESP32

Objective of this project:

In this project we will create a system allowing to turn on and off a lamp (by bluetooth) using ESP32 and a computer.

This is why we are going to create two programs: one for the computer and the other for ESP32.

Components required

ESP32
computer
lamp
relay
plaque d’essai
des fils d’essai

Assembly:

Communication between computer, HC-06 and ESP32:

Micropython Program

Here is the program which allows you to connect the ESP32 to the HC-06 bluetooth module and to receive a message containing the order to turn the lamp on or off.

from machine import UART
from machine import Pin
import time
import utime

lampe=Pin(23,Pin.OUT)# R猫gle la broche D23 de la carte ESP32 en mode sortie
uart = UART(2, 9600)
uart.init(9600, bits=8, parity=None, stop=1)
print(uart)

while True:
    if uart.any():
        while uart.any():
            buf = uart.read()
            if str(buf,'utf-8')=='allumer' :
              lampe.value(1) # Allumer la lampe
            else:
              lampe.value(0) # Allumer la lampe
            print('received:',buf)
            utime.sleep_ms(15)

        utime.sleep_ms(10)
        try:
            uart.write("OK")
            print('sent response')
        except OSError:
            pass

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from machine import UART

from machine import Pin

import time

import utime

lampe=Pin(23,Pin.OUT)# R猫gle la broche D23 de la carte ESP32 en mode sortie

uart = UART(2, 9600)

uart.init(9600, bits=8, parity=None, stop=1)

print(uart)

while True:

if uart.any():

while uart.any():

buf = uart.read()

if str(buf,'utf-8')=='allumer' :

lampe.value(1) # Allumer la lampe

else:

lampe.value(0) # Allumer la lampe

print('received:',buf)

utime.sleep_ms(15)

utime.sleep_ms(10)

try:

uart.write("OK")

print('sent response')

except OSError:

pass

Python program executed in the computer:

Here is the program which allows the computer to connect and send data to the HC-06 bluetooth module.

import serial
import time
from pynput import keyboard

evenement=""
print("Start")
port="COM20" #This will be different for various devices and on windows it will probably be a COM port.
bluetooth=serial.Serial(port, 9600)#Start communications with the bluetooth unit
print("Connected")
bluetooth.flushInput() #This gives the bluetooth a little kick
result = str(0)+'\n'

def on_key_pressed(key):
    global result       
    print('pressed %s' % key)
    result1 ='%s' % key
    if result1=='<97>' : # if you press 1 on the keyboard
      result = 'allumer'+'\n'
      print(result)
    if result1=='<96>' : # if you press 0 on the keyboard
      result = 'eteindre'+'\n'
      print(result)       
    result_bytes = result.encode('utf_8')
    bluetooth.write(result_bytes) 

with keyboard.Listener(on_press=on_key_pressed) as listener:
    listener.join()

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import serial

import time

from pynput import keyboard

evenement=""

print("Start")

port="COM20" #This will be different for various devices and on windows it will probably be a COM port.

bluetooth=serial.Serial(port, 9600)#Start communications with the bluetooth unit

print("Connected")

bluetooth.flushInput() #This gives the bluetooth a little kick

result = str(0)+'\n'

def on_key_pressed(key):

global result

print('pressed %s' % key)

result1 ='%s' % key

if result1=='<97>' : # if you press 1 on the keyboard

result = 'allumer'+'\n'

print(result)

if result1=='<96>' : # if you press 0 on the keyboard

result = 'eteindre'+'\n'

print(result)

result_bytes = result.encode('utf_8')

bluetooth.write(result_bytes)

with keyboard.Listener(on_press=on_key_pressed) as listener:

listener.join()

Switch a lamp on and off via bluetooth with computer and ESP32

Objective of this project:

Components required

Assembly:

Communication between computer, HC-06 and ESP32:

Micropython Program

Python program executed in the computer:

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