DarioB92/sunbell_rf

RF library for SunBell Curtrains

I have 4 Sunbell curtains, that work on 433Mhz and I want to integrate them in my domotic system.

The logic samples show this kind of encoding, which I suppose to be Manchester.

Probably the message is composed by:

Preamble	Transmitter address or sync	Target Id	Command	Checksum

After some decoding attemps, i decided to simply retransmit the sampled signal.
The sampled signal I used for each of the 4 channels is:
automatic up: will open the curtrain
automatic down: will close the curtrain
fine up: while sent will slowly open the curtrain, or regulate inclination
fine down: while sent will slowly close the curtrain, or regulate inclination
stop: will stop automatic up or automatic down.

To use the library it's needed to
define RF_TX pin	#define RX_TX 2
define the channel needed	#define CHANNELx
(optional)to compile only automatic up/down	#define RF_MINIMAL

rfsend(n)

n	MEANING
1	channel 1 automatic-up
2	channel 1 automatic-down
3	channel 1 fine-up
4	channel 1 fine-down
5	channel 1 stop
6	channel 2 automatic-up
7	channel 2 automatic-down
8	channel 2 fine-up
9	channel 2 fine-down
10	channel 2 stop
11	channel 3 automatic-up
12	channel 3 automatic-down
13	channel 3 fine-up
14	channel 3 fine-down
15	channel 3 stop
16	channel 4 automatic-up
17	channel 4 automatic-down
18	channel 4 fine-up
19	channel 4 fine-down
20	channel 4 stop

Example

//define rf transmitter pin
#define RF_TX 2

//define needed channels
#define RF_CHANNEL1
#define RF_CHANNEL2
#define RF_CHANNEL3
#define RF_CHANNEL4

//define if you need only automatic up/down
#define RF_MINIMAL

//include the library
#include "custom_rf_complete.h"

#define RESEND 20

void setup() {
  //set rf transmitter pin as output
  pinMode(RF_TX, OUTPUT);
  //led go brrrr
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  //will send the code RESEND times (original 5)
  for(int i=0; i<RESEND;i++){
    rfsend(2); //channel 1 automatic-down!!!
  }
  digitalWrite(LED_BUILTIN, HIGH);
  delay(3000);
  digitalWrite(LED_BUILTIN, LOW);
}

FAQ

1. Can I use for... Sure
2. Will it work on my curtrains? Yes, push both buttons on the reciever and send a command for the choosen channel. N.B. this will exclude your remote
3. But I want to use my remote!!! Ok, you can, sample your remote. You can convert .csv file to arduino code importing it in excelmodule.xlsx

Possible improvements

1. Decode
2. Using the same lenght delay instead of sampled signal (ex. 450us instead of 438us and 440us and...)

To Radaelli, I'm really impressed, the quality of the PCB it's astonishing!