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Controlling Hexabitz Rgb Led Module Using 4x3 Keypad Via Ras

Made by Aula_Jazmati / Games & Gaming / Home Automation / Kids & Family / Lights / Security

About the project

Controlling Hexabitz RGB LED Module Using 4x3 Keypad Via Raspberry Pi

Project info

Difficulty: Moderate

Platforms: Raspberry Pi, STMicroelectronics

Estimated time: 1 hour

License: MIT license (MIT)

Items used in this project

Hardware components

	https://hexabitz.com/product/raspberry-pi-interface-hf1r0x/ Raspberry Pi Interface (HF1R0x)	x 1
	https://hexabitz.com/product/rgb-led-h01r0x/ RGB LED (H01R0x)	x 1
	Membrane 3x4 Matrix Keypad	x 1
	Raspberry Pi 3 - Model B+	x 1

Story

In this tutorial, I will show the connection of such a keypad matrix and how to easily read them with the GPIOs.

Then I use it for Controlling Hexabitz RGB LED Module Via Raspberry Pi Interface module.

A small keypad is a convenient way of providing users of your custom projects with a way to interact with the system.

HF1R0x is Hexabitz Raspberry Pi interface module

HF1R0x module enables you to seamlessly interface your Hexabitz modules to a Raspberry Pi 3B/3B+/4B single-board computer.

Small form-factor with options to connect Hexabitz modules all-around the interface and power the modules from Raspberry Pi on-board 3.3V supply and most of GPIOs is free to use with anything (except txrx GPIO)

Use our C++ Hexabitz Interface library on Raspbian, Ubuntu or other compatible Linux distributions from within your C++ or Python applications.

HF1R0 is an open source project which enables the community to use the projects that are available off-the shelf, make your own projects using the library core or modify the library for your own custom needs and requirements.

https://hexabitz.com/product/rgb-led-h01r0x/

https://hexabitz.com/product/raspberry-pi-interface-hf1r0x/

Note:

It’s easy to connect a simple keypad to a Raspberry Pi and provide Hexabitz users with a convenient way to input data and interact with your custom Raspberry Pi based projects.
The keypad only requires a few digital I/O pins to operate. The Raspberry Pi doesn’t need to supply the keypad with a power source, as the key-matrix solely consists of simple push buttons. The Raspberry Pi sends pulses to each row of the keypad’s internal matrix, and when a user pushes down on a button, the button closes a contact that connects a single row to a single column. The Raspberry Pi listens to changes in the column signals, and when it detects one, the software can decode which button the user pressed. This procedure is easy to implement in any programming language supported by the Raspberry Pi 😃

Schematics, diagrams and documents

Code

import RPi.GPIO as GPIO
import time
import serial

L1 = 25
L2 = 8
L3 = 7
L4 = 1


C1 = 16
C2 = 20
C3 = 21


GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)

GPIO.setup(L1, GPIO.OUT)
GPIO.setup(L2, GPIO.OUT)
GPIO.setup(L3, GPIO.OUT)
GPIO.setup(L4, GPIO.OUT)


GPIO.setup(C1, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
GPIO.setup(C2, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
GPIO.setup(C3, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
ch1= ["1","2","3"]
ch2= ["4","5","6"]
ch3= ["7","8","9"]
ch4= ["*","0","#"]
p=0
ser = serial.Serial(        
               port='/dev/ttyS0',
               baudrate = 921600,
               parity=serial.PARITY_NONE,
               stopbits=serial.STOPBITS_ONE,
               bytesize=serial.EIGHTBITS,
               timeout=1
           )

print(ser.name)
ser.write ('\r'.encode())
time.sleep(4) 
ser.write ('ping'.encode())
ser.write ('\r'.encode())
x=ser.read(3000)
time.sleep(10)
print(x)
def readLine(line, characters):
    global p
    GPIO.output(line, GPIO.HIGH)
    if(GPIO.input(C1) == 1):
        print(characters[0])
        p=characters[0]
        
    if(GPIO.input(C2) == 1):
        print(characters[1])
        p=characters[1]
        
    if(GPIO.input(C3) == 1):
        print(characters[2])
        p=characters[2]
        
    GPIO.output(line, GPIO.LOW)
    return p
    

try:
    while True:
        
        readLine(L1, ch1)
        if(p =="1"):
            print("red")
            ser.write ('Color red 90)'.encode())
            ser.write ('\r'.encode())
        elif(p=="2"):
            print("blue")
            ser.write ('Color blue 90)'.encode())
            ser.write ('\r'.encode())
        elif(p=="3"):
            print("green")
            ser.write ('Color green 90)'.encode())
            ser.write ('\r'.encode())
        readLine(L2, ch2)
        if(p =="4"):
            print("yellow")
            
            ser.write ('Color yellow 90)'.encode())
            ser.write ('\r'.encode())
        elif(p=="5"):
            print("cyan")
            ser.write ('Color cyan 90)'.encode())
            ser.write ('\r'.encode())
        elif(p=="6"):
            print("magenta")
            ser.write ('Color magenta 90)'.encode())
            ser.write ('\r'.encode())
        readLine(L3, ch3)
        if(p =="7"):
            print("white")
            ser.write ('on 90)'.encode())
            ser.write ('\r'.encode())
        elif(p=="8"):
            print("black")
            ser.write ('off'.encode())
            ser.write ('\r'.encode())
        elif(p=="9"):
            print("all")
            ser.write ('Sweep fine 3000 3'.encode())
            ser.write ('\r'.encode())
            
        readLine(L4, ch4)
        time.sleep(0.1)
except KeyboardInterrupt:
    print("\nApplication stopped!")

Credits

Aula_Jazmati

https://www.hackster.io/aula-jazmati

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Controlling Hexabitz Rgb Led Module Using 4x3 Keypad Via Ras

About the project

Project info

Items used in this project

Hardware components

Story

Schematics, diagrams and documents

Code

Credits

Aula_Jazmati

Leave your feedback...

Shop

Project Hub

Video

Blog

Shop home

3D printing

Single Board Computers

Development kits

Sensors

Internet of things

Robotics

Accessories

Product of the Week

Electromaker Educator

The Electromaker Show

The Electromaker Podcast

Controlling Hexabitz Rgb Led Module Using 4x3 Keypad Via Ras

About the project

Project info

Items used in this project

Hardware components

Story

Schematics, diagrams and documents

Code

Credits

Aula_Jazmati

Leave your feedback...

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