This is a simple Python script for the use with a 433 MHz RF transmitter (tested with FS1000A), a Rasbperry Pi and EMW100R series remote controlled switches.
The EMW100R remote controlled switches are made by EverFlourish for Clas Ohlson AB.
The only documentation I could find on the web turned out not to work with my switches.
Probably the protocol varies between revisions of the switches. This
protocol is tested with my switches labelled with: Ref: 26.1183 &
200909 28239.
After sniffing the protocol I learned that the message format is
[INTRO],[ID],[COMMAND] and the transmission frequency is around 1.75
KHz.
Intro sequence is:
10101010101001001010100100101010010010101001001010010100101001010100100101001010
(80 bits)
Hexdecimal: 0XAAA4A92A4A9294A5494AL
The ID is 27 bits long
| ID | Binary | Hexadecimal |
|---|---|---|
| 1 | 100101001010010100100101001 | 0X4A52929 |
| 2 | 100100101001010010101001010 | 0X494A54A |
| 3 | 010101001001010100101001001 | 0X2A4A949 |
| 4 | 010100101010010100101001010 | 0X295294A |
The command is 22 bits long
Switch On: 0100101001010010100101 (0X1294A5)
Switch Off: 0101001010010100101001 (0X14A529)
The Python script is fairly minimal as my only desire was to integrate it with Home Assistant.
Usage: ./EMW100.py [ID] [STATE]
Examples:
- Turn on switch 1:
./EMW100.py 1 1 - Turn off switch 4:
./EMW100.py 4 0
Change TX_PIN to whatever GPIO pin you connect the DATA line to from
the RF Transmitter.