I’m getting into the QWIIC stuff and have several devices working and now I need to create my own custom board using the qwiic openlog device and am trying to find a correct schematic. I have looked at a pdf retrieved from the sparkfun website and also downloaded a schematic file from github. The issue is there are two signals that are not shown in the schematics but are on the boards. I can meter from the SDA and SCL pins on the qwiic connectors to the ATMEGA328 chip to pins 27 and 28 and have continuity. This indicates the possibility that there could be other connections that are not shown in the schematic. Has anyone else had this problem and if so where can I find a correct schematic to work from.
Hello, thanks for writing in on the forums.
The schematic in the documents section for the qwiic Openlog seem to show that pins 27 and 28 are connected to SDA and SCL pins respectively on the PCB:
https://www.sparkfun.com/products/15164
If you could provide more details of the issue I may be able to assist further.
Looking at the wrong device. With your reply on device 15164 I looked at what I was looking up and I kept getting device 13712. Not paying attention. Thanks.
Hey, no worries. I have certainly done this myself before!
Cheers and happy hacking.