I purchased this to have a cleaner solution for my CarPi system. I had my own 12v to 5v converter, but it was a bit clumsy. And, I wanted to incorporate a safe shutdown mechanism, to keep from corrupting my SD-Card on the Pi. After wiring up a test system to a 12v battery the delayed power worked out of the box. The only issue I was having was making sure the Pi was powering off properly. I realized that it wasn't because I had glossed over the directions. In short, I didn't realize that the GPIO21 on this device HAD to be connected to the GPIO21 (pin 40) on the Pi for the Python script to trigger the shutdown. My bad! In short, I connected the USB-A on this device to my Pi's USB-C connection AND connected GPI021 to GPIO21 between this device and the Pi. Then everything worked as expected. I'm still learning about the Pi GPIO connections. I added a simple message in the Python script to log a shutdown just before the "poweroff" call.
This is a very clean solution. Shipping took about 13 days to the States.
My communication with PicoTouch was awesome. This was really my first RaspberryPi build so naturally I had a lot of questions. PicoTouch was very patient and communicative throughout the whole process providing help where he could and offering direction where he didn't have all of the answers.
The product itself is perfect for my application. I am using one of the USB ports to power my pi while the second one is being used for an HDMI-to-RCA converter. The only challenge for me was getting the unit to work properly with a Pi running LineageOS (which doesn't support Linux) but Pico helped me discover a forum where I was able to get proper code to get the unit working. The only modification I had to do beyond getting new code, was connecting the unit to a different GPIO pin (GPIO21 is reserved for other activities with LineageOS).
I would highly recommend this product to anyone who is considering it!
Response from PicoTouchStore | Jan. 16, 2021
Thank you very much sir! I am glad that the case with LineageOS has been successfully resolved! Greeting!
Product works perfectly, arrived in ok time considering I've ordered it in the middle of the pandemic, the product was slightly damaged when arrived but I've managed to repair it with great help from the vendor, great communication and documentation too, I've tested it and it works wonderful. Going to integrate it in a build on my car and post a video about it. I strongly recommend.