I am using Raspberry Pi 3 Model B for my project purpose. The Pi 3 works fine when it is powered through a 5V/2A charger and I am able to use the inbuilt Bluetooth and Wifi using it, but when I try to use the GPIO pins, I am not getting proper output voltage. For eg. when I use a multi meter to check the output voltage at 5V pin or 3.3v pin, the meter shows reading around 0.1V to 0.3 V. Is it due to the 5v/2a charger,which is not providing the required power? Or, is the problem with the Raspberry Pi board? Should I buy a 5V/2.5A charger as per the Pi3 specifications?
- You have a faulty meter (needs a fresh battery perhaps)
- You are not measuring the voltage across the correct pins
I power my Pi3B from a phone charger providing about an amp (the Pi probably uses about half an amp). I don't have any power hungry devices plugged in to the USB sockets.