hueblo wrote:Is the micro USB hooked up so you can use it as data in if you wanted to? its not necessary for this graceful shutdown right? How is the All in one getting power? Why is the SD card reader hooked up to USB hub? I noticed in Helders thread someone indicated that its hooked up to the USB hub if you follow wermys tutorial but I looked at it and was not able to find anything indicating that the SD card reader is hooked up to USB.
Yup, the micro USB is hooked up only so I can get data in through that port. I figure if I'm going to have a USB connection, I might as well make the exterior one active for data.
The All-In-One gets power (I think) through the "USB to Pi Zero" red wire, that is then connected to the Pololu switch. It should get power when that switch is activated, right along side the Pi and screen. I've edited the diagram picture to make this a bit more clear. @Helder, can you correct me if I'm wrong on that?
With the SD card, I misinterpreted @Wermy's tutorial, @jermzz made a great post
that helped me out.
jermzz wrote:I struggled with this based on kb's diagram. I wasn't familiar with Sd and USB and couldn't make any sense of what his diagram was saying vs what the pi zero pads were as they were completely different.
Wermy's USB hub is connected to the USB pads on the pi (22 and 23 I believe) and I got the KB SD cartridge working using the following, which is how wermy has it.
1 VDD/VCC - PP8 (3.3v)
2 DAT2 - PP18
3 CS - PP19
4 DATA_IN - PP15
5 SCLK - PP14
6 DATA_OUT - PP16
7 DAT1 - PP17
8 VSS/GND - PP6
I've edited my diagram to reflect the change (also using a better labeled SD card reader)