This has been asked and answered many times, but my specific question is not in the list of results when I search.
I have a nominal 2.6A supply here, and it remains stable at 5V up to exactly this amp load with no voltage drop. It’s quality. So I would just like to know if I need to do some resistor magic/short-circuit on the TX/RX lines for it to work perfectly with my pi3.
I’ve observed on most quality 5V supplies that RX/TX are shorted, and I am aware of apple’s weird voltage divider circus on their iPhone/iPad PSUs - but this is a Pi - does it even pay attention to RX/TX signal lines?
My expected max load is 1.5-2A, not more. I’ll pull an extra 5V rail from this PSU for something else nearby.
Let me know if I need to clarify.
Note: I’ve used a 2.1A iPad charger up to now, and it does not work well at all. Even when I observe a load of only 1.3A, there are not-enough-power indicators when I attach 50mA USB peripherals. A standard off the shelf charger at 2A has no issues... But I need the extra 5V rail for something else nearby.
TL;DR: I am connecting 5V/GND to a male microUSB breakout board, and need to know if using resistors or shorting the data lines (the aforementioned RX/TX) will in any way affect the Pi’s operation. If so, how?
Update: The PSU wasn’t the issue; I was using too thin, too long a cable. At the Pi I measured 5.10V when it was turned off, but ~4.85V when on and loaded. So I should read 5.25V at the Pi when it’s off:/