I am planning to use Witty to power up a PI in my caravan. If the Caravan is not in use the power up will be only once per week or so. In order to send data I also have a 4g device which needs usb 5v 2A. Can I power that with the witty?
Cheers Ray
This depends on your power supply, and the actual current needed by your 4G device.
Different Witty Pi models have different output current rating, however they can not deliver more current than your power supply can offer. In the majority of cases, your power supply is the key factor that actually maters.
The accurate answer for this question should come from experiments.
@admin Thanks for the quick reply. The power supply is a 12v 150A Lipo so that’s no issue. Since it’s 5v 2A, both the pi4 and pi5 cannot power it. My question was perhaps not clear. I want to power the 5v 2A directly from the Witty. Is that possible?
@raymond-van-der-holst If your 4g device is a USB device, it needs to be connected to Raspberry Pi's USB port. In case it needs more current than Raspberry Pi USB port can provide, you need to connect it with a powered USB hub (for example, MEGA4), given your power supply can deliver the current needed by Raspberry Pi and the 4g device together.
This will not work out of box, experiments are necessary.