Remote Control Switches via 433 Mhz transmitter using RPi.GPIO instead of WiringPi

This page shows the way to control your lights and other devices in your house by using a simple 433 Mhz transmitter connected to the Raspberry Pi.

For more than 10 years I used the WiringPi software from www.wiringpi.com (which was standard software to use at that time and now is deprecated).

I created two scripts (one Bash and one Python) which are independent of the Raspberry Pi model used and OS/Debian version!

The scripts will still work after updates/upgrades of your Raspberry Pi hardware/software!

It's using the RPi.GPIO software which is standard installed.

Supported remote switches switches (which will work with this instruction):

- ELRO AB440 S
- Brennenstuhl RCS 1000 N Comfort
(Not tested: BAT RC-3500-A, Intertechno (Silvercrest) PA3-1000, Vivanco FSS 31000W)

NOTE: The ELRO switches are no longer available.. Order (Amazon/Ebay) and use the "Brennenstuhl RCS 1000 N Comfort" which are exactly the same as the ELRO's !

Hardware:

- Raspberry Pi

- RF-DRA887TX or DRA888TX or DRA889TX DORJI 433MHZ 10/17dBm ASK TRANSMITTER , DIP PACKAGE => http://www.dorji.com/products.php?CateId=36

PIN used on Raspberry Pi:
4 => 5V ----> +5V RF-Transmitter
6 => GND ----> 0V/GND RF-Transmitter
8 => GPIO for TX ----> Data out RF-Transmitter ==> This is Pin 14 !! See "TRANSMIT_PIN = 14" (in my case this is 14) in the elro.py script.

Scripts to create elro & elro.py (and 'chmod 755' on them):

-------------------------- name it: elro ------------------------------------------------------------

#!/bin/bash

if [ -z "$3" ]

then

echo "Usage: $0 <SwitchId>"

echo "Example: $0 24 B on"

exit

DT=`date +%d-%m-%Y-%H-%M`

export ARG1=$1

export ARG2=$2

export ARG3=$3

D2B=({0..1}1{0..1}1{0..1}1{0..1}1{0..1}1)

PART1=`echo ${D2B[$ARG1]}|rev`

case $ARG2 in

A|a )

PART2=1110101010

;;

B|b )

PART2=1011101010

;;

C|c )

PART2=1010111010

;;

D|d )

PART2=1010101110

;;

E|e )

PART2=1010101011

;;

esac

case $ARG3 in

ON|On|on )

PART3=11101

;;

OFF|Off|off )

PART3=10111

;;

esac

#echo "${PART1}${PART2}${PART3}"

./elro.py ${PART1}${PART2}${PART3}

exit

-------------------------- end of: elro ------------------------------------------------------------

-------------------------- name it: elro.py ------------------------------------------------------------

#!/usr/bin/python3

import time
import sys
import RPi.GPIO as GPIO

if len(sys.argv) == 1:
print('no arguments passed')
print('usage example: elro.py 1010111111010101011..')
sys.exit()

# Next is for Elro or Brennenstuhl RCS 1000 N Comfort
short_delay = 0.000316
long_delay = 0.00095
extended_delay = 0.0098

NUM_ATTEMPTS = 10
TRANSMIT_PIN = 14

def transmit_code(code):
'''Transmit a chosen code string using the GPIO transmitter'''
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(TRANSMIT_PIN, GPIO.OUT)
for t in range(NUM_ATTEMPTS):
for i in code:
if i == '1':
GPIO.output(TRANSMIT_PIN, 1)
time.sleep(short_delay)
GPIO.output(TRANSMIT_PIN, 0)
time.sleep(long_delay)
elif i == '0':
GPIO.output(TRANSMIT_PIN, 1)
time.sleep(long_delay)
GPIO.output(TRANSMIT_PIN, 0)
time.sleep(short_delay)
else:
continue
GPIO.output(TRANSMIT_PIN, 0)
time.sleep(extended_delay)
GPIO.cleanup()

if __name__ == '__main__':
for argument in list(sys.argv[1:]):
exec('transmit_code(argument)')

exit()

# Additional information for other Brands such as Action , Blokker and Kaku (Klik aan en Klik uit)..you or I should do still a bit work on them;-)

#ActionSwitch:periodusec=190 ,567 ,5832
# Action 18_B_on : 1000101000101110101010111
# Action 18_B_off: 1000101000101110101011101
# Action 7_B_off : 0000001010101110101011101
# Action 7_A_on : 0000001010111010101010111

#BlokkerSwitch:periodusec=228 ,685, 7050
# Blokker 7_A_on : 1100111111111111111111111
# Blokker 2_B_off: 1111000011111111111111111

#KaKuSwitch:periodusec=370 ,1110, 11510
# Kaku M_10_on : 1111101010111110111010101
# Kaku M_10_off : 1111101010111110111010111
# Kaku M_7_off : 1111101011101011111010111
# Kaku G_7_off : 1110101111101011111010111
# Kaku B_7_off : 1011111111101011111010111
# Kaku B_2_on : 1010111110111111111010101
#ActionSwitch(unsigned short pin, unsigned int periodusec=190);
#BlokkerSwitch(unsigned short pin, unsigned int periodusec=230);
#KaKuSwitch(unsigned short pin, unsigned int periodusec=375);
#ElroSwitch(unsigned short pin, unsigned int periodusec=320);

-------------------------- end of: elro.py ------------------------------------------------------------

Now simply execute the elro (will also work for Brennenstuhl) command with the correct code.

Like:

./elro 24 D on

./elro 24 D off

Optional CODE information:

ON=1
OFF=0

Switch names
1 2 3 4 5 A B C D E

Values:
1 2 4 8 16 A B C D E

Examples:

0 0 0 1 1 0 0 0 0 1 => 24 E
0 1 1 1 1 0 1 0 0 0 => 30 B