The protocol that the EV1527 chip is one of the kind that has a (almost) unique ID as part of the sending sequence to avoid accepts conflicts with other implementations.
The receivers must "learn" these IDs usually by using a specific button on the devices.
From the datasheet you can see that the a start code and 24 data codes are sent.
From the manual you can find 3 different codes in use:
| Code | timing ratio |
|---|---|
| 's' | 1 : 32 |
| '0' | 1 : 3 |
| '1' | 3 : 1 |
A fully frame will consist in a
- 's' preample
- 10 digits that make a unique sender ID
- 4 digits that vary by the input signal (button) used.
These ratios need to be multiplied by a base timing that varies.
The EV1527 protocol can be added to the signal parser by calling sig.load(&RFCodes::ev1527);
The baseTiming of 320 µ seconds is a good starting point but may be adjusted in the protocol defintion.
[ev1527 s100100110110001001000001]
[ev1527 s100100110110001001000010]
- EV1527 datasheet https://www.sunrom.com/download/EV1527.pdf