Remote power on/off pins

my first post here, does somebody know hot to use the PWR/GND/LED+/LED- pins near the Arduino pins?
Can I use them to power on/off the Odyssey?


Hi @girogiri

To remote turn it on/off there are few methods:

  1. if you have a WiFi Smart Plug lying around, you can use the plug and set X86 to auto turn on when it’s powered.

  2. Or using the WAKE ON LAN methods, there is a setting on BIOS but it should be on by default. If you are on a windows, go to Network settings, configure WAKE ON LAN settings. Can refer to this

From another device in the same network, you can turn X86 using sth like this:

not to my knowledge, you can set the bios to auto power on, as for powering off, you can use the raspberry pi trick of monitoring a GPIO pin and when it goes from high to low then issue the shutdown command. that’s what I do

1 Like

Yes, it is possible, you can configure BIOS that board does not start booting when you plug in the power, then you can start powering the board by shortening PWR and GND. This way you can also power the board off.

LED+ and LED- give you possibility to connect LED and have visual signal if board is running or not. There is 3.3V there so you can use these pins to connect to GPIO on some other board for monitoring. However, I don’t know what is current limitation on these pins.

All the best,

Giorgio, if you never got an answer, I figured the answer to your question out by DMM and experimentation. as seeed support apparently found it challenging to answer such a simple and straightforward question. Among other ways of resisting answering me, they told me this was “part of my hardware design” (despite also that their case must use this header and the header is in their manual, tho unexplained).

Anyway, yes, (they are weirdly named for this application but) short the two pins “pwr” and “gnd” briefly to turn on or off your unit (or sleep it maybe), and use “led+” and “led-” to power your remote led.
Works great; I have a nice button from adafruit which has an led in it and momentary switch, and the switch works just as the normal power on switch does, and my led reflects the state of the normal power switch led, blinking during sleep slowly, etc. I can’t remember if you need a series resistor to prevent excessive current with your led, try it with an cheap led you don’t mind burning out to begin with would be one approach. My pushbutton from adafruit didn’t need a resistor, but either it already has one, or else the odyssey does.

When I initially asked the question, I didn’t have the board yet, was why I didn’t have the answer quickly through experiment; once I got the board it was simple from there.

Thanks for your reply, after messing around with the board I realized those two pins were the route To go.

@girogiri intrigued by your post. Can you confirm that the Odyssey can be powered down by using these pins?

Hi Fridge,
sure you turn it on ( if it’s off) or you put it in stand-by if windows is on like the switch on a regular computer