I’ve just order my opensprinkler pi and I would like to use it with a temperature-humidity sensor AM2302 I already have.
My question is how may I perform the connection?
For the serial data I plan to use GPIO 8 which is not used by the OSPi. But where can I connect the VCC (3,3V-5V) and the GND? The 3V3 pin and the GND pin at the raspberry pi are already used by the OSPi.
I noticed that the opensprinkler pi v1.2 has some VCC and GND pinouts. May I use then?
Sure, you can use any pair of Vcc / Gnd pins on the OSPi board. Those are designed for connection to external components. You should use Vcc (3.3V) and *not* VIN (5V), because Raspberry Pi’s GPIO pins in theory can only accept 3.3V input.