by robertvg » Mon May 08, 2017 11:43 am
Does anybody have experience with powering the RPI by using the display USB port ?
We have displays with 1x upstream USB, and 4x downstream USB port (Fujitsu BT23-W)
I found that the downstream ports only provide power when there is a signal or power detected on the upstream port.
And once there is power on the downstream port I can remove the cable from the upstream port and the RPI will still get power from the display.
But when everything is switched off (for example in case off a general power failure), then afterwards the RPI will not get any power as the display does not detect anything on the upstream port. So the RPI will never start in that situation.
Does anybody have experience with powering the RPI by using the display USB port ?
We have displays with 1x upstream USB, and 4x downstream USB port (Fujitsu BT23-W)
I found that the downstream ports only provide power when there is a signal or power detected on the upstream port.
And once there is power on the downstream port I can remove the cable from the upstream port and the RPI will still get power from the display.
But when everything is switched off (for example in case off a general power failure), then afterwards the RPI will not get any power as the display does not detect anything on the upstream port. So the RPI will never start in that situation.