Raspberry Pi Stack Exchange is a question and answer site for users and developers of hardware and software for Raspberry Pi. It only takes a minute to sign up.
Sign up to join this community
I am building a home console stereo and I am going to use an RPi3 with a hifiberry dac+. And I am wondering if I can use a waveshare power relay to be able to control the power to the system from my phone. Is it possible to have two modules connected to one RPi or would I need to use 2 Pi's?
Here us a link to the power relay http://www.waveshare.com/rpi-relay-board.htm
Assuming that the two boards do not use the same pins (they can share the I2C and SPI bus pins - if using SPI each board will need a unique slave select pin.). You could use the Black Hat Hack3r Board. To access the GPIO pins while still using a HAT.
Note: if both boards fully conform to the hat standard (use an eprom to identify and configure the HAT's hardware) they will not work together, even with this board.
If you can not connect both boards to a single Pi, using a second Pi is a good option. But a Pi2 is overkill if all you want to do is switch the power on/off via a relay (a Pi Zero W is more than capable of this and much cheaper).
