Wiring diagram - yuriizubkov/petwant-device GitHub Wiki

Onboard connector pinout

1-2. Speaker. We are not going to use those pins, you can just remove wires from the connector for convinience. Later you can solder the output of the audio amplifier to the "CON5" connector on the board.

3. Button. Signal lead from the "Set" button on the front panel. +3.3V is always present in normal state. Grounded in pressed state. Already has resistor, connected in serial with the button. The second independent part of the button is connected to the microcontroller and causes a single feed portion to be fed with a short press. If you hold the button down for more than 3 seconds, then nothing happens. Therefore we have the ability to respond to short and long press on the button from our code on Raspberry Pi.

4. Link LED. Minus contact of the Link LED, already has resistor in serial. If you want to lit that LED, you need to write logic 0 (3.3V TTL) to the corresponding pin on the connected Rpi board.

5. Power LED. Same as Link LED.

6. TX. TX pin of the ZEN3309A MCU (3.3V TTL! :fire: Be careful, you can burn the controller by connecting an FTDI adapter with 5V TTL to it.)

7. RX. RX pin of the ZEN3309A MCU (3.3V TTL! :fire: Be careful, you can burn the controller by connecting an FTDI adapter with 5V TTL to it.)

8-9. Ground.

10-11. +5V. We will use Ground and + 5V to power the Raspberry Pi board.