Remote power button for Banana Pi M1

[John Felstead]

I want to put a banana Pi M1 plus a 2.5" SATA drive in a plastic box with only the ethernet and USB ports exposed. This means the onboard power button is not accessible to boot the board.

 

Are you able to power on the board using the GPIO pins? If so please could someone advise which pins to connect to?

 

I also aim to put a 5.5 x 2.1mm barrel connection on the box (with a latching press button switch for isolation) for the +5v supply and connect a short micro USB connector from the barrel socket to the board and also attach the SATA power leads directly rather than powering from the board 2 pin connector to take the load off the micro USB input.

[eselarm]

3 hours ago, John Felstead said:

Are you able to power on the board using the GPIO pins? If so please could someone advise which pins to connect to?

If you look at the wiki page you find the typical 26-pin header like for the original RaspberryPi. pins 2 and 4 are tagged 5V and pin 6 is tagged GND. However, in the schematics there is no mentioning of the 26-pin header. There is GND ofcourse and there is ACIN, that is the 'master' 5V you need to apply and is the same as the VBUS of the microUSB power connector.  As there is also the option to connect a LiPo battery (needs soldering), I decided to use the microUSB input for power, I have enough DIY of those connectors (need soldering) as I am not 100% sure if ACIN is exactly the same as pins 2 and 4. I also use a very small DC/DC from 12V to 5V, so I have 12V, 5V, GND for BananaPi and 3.5inch HDD. In never do anything with power button, It is just and old molex connector that I use to connect/disconnect power. You will have the SATA connector sticking out quite a bit, even more then the microUSB for power, so using 26-pin header for power is not getting it much more compact.