Control a Somfy 5-channel remote (e.g. Somfy Situo 5 io Pure) from a Raspberry Pi using GPIOs.
- Raspberry Pi (should work with any revision)
- Somfy 5-channel remote
- Python 2.7 with RPi.GPIO, install with
apt-get install python-rpi.gpio
It is quite simple to modify and connect a Somfy Situo 5 io Pure remote control as it kindly already provides soldering pads for all LEDs and buttons. Although this remote is originally powered by a CR2430 3V battery it can be supplied by the 3.3V of the Raspberry Pi.
Solder some resistors into the cables to limit the current in case something goes wrong.
LED connection schematic:
3V3 (RPi)
|
LED
|
R=560
|
o <--- R=10k --- RPi GPI
|
Somfy µC GPO
Button connection schematic:
3V3 (RPi)
|
R=22k
|
Somfy µC GPI --- R=100 --- o <--- R=330 --- RPi GPO
|
\ (Button)
|
GND (RPi)
In both schematics the <--- indicates the position where the connection to the Raspberry Pi must be soldered to. The rest belongs to the original circuit of the remote control.
somfy-control can be configured by modifying the Python dictionaries LEDS and BUTTONS at the top of the file. Either wire the remote control to the Raspberry Pi as shown or change the dictionary values to the GPIO header pin numbers (not Broadcom channel numbers) the related wires are connected to. Do not change the dicionary keys (LED1, UP, ...).
Example: Change 'LED1': 32, to 'LED1': 29, to use pin number 29 instead of 32 for LED1.
Execute somfy-control.py --help to see a quick overview over all available command line parameters. The following parameters are available:
-h, --help Print the help message and exit.
-c {1,2,3,4,5}, --channel {1,2,3,4,5} Remote control channel number.
-b {UP,MY,DOWN}, --button {UP,MY,DOWN} Remote control button to press.
-o, --override-warnings Override all warnings.
-v, --verbose Enable verbose output.
Both parameters --channel and --button are mandatory. Please not that somfy-control.py must be run as root to control the GPIOs of the Raspberry Pi.
Example: # somfy-control.py -c 3 -b DOWN