Press the menu key at the top right to enter manual recording as in the image below
Move the upper slider to 4 seconds
Press the P1 key, the CH1 LED turns on
Press the "Send opening signal" button in the app
The CH1 LED flashes 2 times to confirm signal copying.
Press the P1 key twice to exit programming mode.
**depending on the channel used, it may be necessary to activate channel 2 (CH2) to activate the copy, just press the P1 key twice and the CH2 LED will light up