DIY Wireless RF 433 remote and relay board with security (rolling code and encryption)

This is a diy project for wireless rf remote and receiver relay board with strong security (encryption and rolling code) on 433Mhz, scalable to any number of remotes and receivers you need and with a long range.

For the remote, i've used ATMEGA328p with the transmitter H34A RF module on 433Mhz and get the current consumption all the way down to 0.20 uAmps.

For the receiver, i've used a standard arduino nano with LR45A RF Receiver module.

In a future version i want to add the option to have multiple rolling codes to be able to use multiple remotes with the same receiver unit, i want to add H34A transmitter RF module to the receiver unit so i can confirm the state of the relays and i want to build a network hub bridge with a transmitter and a reciver rf modules to be able to control all my recivers from one webpage.

The libraries used are:
1. xxtea-iot-crypt.h - xxtea-iot-crypt Library @version API 1.2.1 @author boseji - salearj@hotmail.com | http://github.com/boseji/xxtea-iot-crypt
2. RH_ASK.h - RadioHead Amplitude Shift Keying Library | https://www.airspayce.com/mikem/arduino/RadioHead/index.html
3. SPI.h - Not actually used but needed to compile the RadioHead Amplitude Shift Keying Library
4. EEPROM.h - eeprom library to save the roling code
5. LowPower.h - Lightweight low power library for Arduino by rocketscream | https://github.com/rocketscream/Low-Power | https://www.rocketscream.com/blog/2011/07/04/lightweight-low-power-arduino-library/

RF security video by Samy Kamkar - https://www.youtube.com/watch?v=1RipwqJG50c&list=PLB5B1069193531DB7&index=28&t=0s
Duracell AAA battery test - https://rightbattery.com/283-1-5v-aaa-duracell-alkaline-battery-tests/

The sketches and the basic schematic can be downloaded here: https://drive.google.com/file/d/1GMLnDXNmTSQ2fB_dDFSd6z0ix3_vg-Yh/view

Paypal donations: https://paypal.me/ThinkSmallBuildBig
Patreon donations: https://patreon.com/ThinkSmallBuildBig

Link's Romania
ARDUINO UNO R3 ATmega328p - https://l.profitshare.ro/l/7066416
Arduino Nano v3 - https://l.profitshare.ro/l/7066421
ATTINY85 - https://l.profitshare.ro/l/7066418
Atmega328P-PU - https://l.profitshare.ro/l/7066420
LM2596 DC-DC Step Down Regulator Input 3.2V-40V Output 1.25V-35V Adjustable Buck Converter - https://l.profitshare.ro/l/7066446
MP1584EN DC-DC Step Down 3A Adjustable Buck Converter - https://l.profitshare.ro/l/7066447
5V 1Relay Module Board with Low Level Trigger - https://l.profitshare.ro/l/7066452
Transmitter RF module H34A 433 MHz, 4.2 - 12 V - https://www.optimusdigital.ro/ro/ism-433-mhz/1577-emiator-in-miniatura-h34a-433-mhz-42-12-v.html?search_query=H34A&results=3
Receiver RF module LR45A 433 MHz - https://www.optimusdigital.ro/ro/ism-433-mhz/1580-receptor-de-433-mhz-cu-sensibilitate-mare.html?search_query=LR45A+&results=1

Видео DIY Wireless RF 433 remote and relay board with security (rolling code and encryption) канала Ionut Fedaceag