11-18-2016, 10:30 AM
Have you noticed any power leakage with this setup? I did something similar - I had a USB-UART adapter that I can't use, because it's not compatible with any of my SBC's (the chip runs @ 1.8V). I realized the other day that even though I can't use the chip, I could still use the wire. So I cut off the wire and connected some header connectors.
On one pine, I connected to UART0 on the EXP connector: black to pin 6 for ground, green to pin 8 for RX, white to pin 7 for TX.
On the other pine, I connected the other end of the cable to UART2 on the Pi2: black to pin 6 for ground, green to pin 8 for TX, white to pine 10 for RX.
I've been using this setup for 2 days now and it works great - I can see all the bootup messages and can log in over the serial console, no problem. But this morning, I happened to shut down the 2nd pine, and couldn't get the red power LED to go off. I disconnected the AC power, unplugged the battery, and the light was still on. It finally went out when I uplugged the serial cable.
Did I wire something up wrong or is this a flaw in the board? Would the power going in through the UART pins have damaged anything?
On one pine, I connected to UART0 on the EXP connector: black to pin 6 for ground, green to pin 8 for RX, white to pin 7 for TX.
On the other pine, I connected the other end of the cable to UART2 on the Pi2: black to pin 6 for ground, green to pin 8 for TX, white to pine 10 for RX.
I've been using this setup for 2 days now and it works great - I can see all the bootup messages and can log in over the serial console, no problem. But this morning, I happened to shut down the 2nd pine, and couldn't get the red power LED to go off. I disconnected the AC power, unplugged the battery, and the light was still on. It finally went out when I uplugged the serial cable.
Did I wire something up wrong or is this a flaw in the board? Would the power going in through the UART pins have damaged anything?