Hello,
I am working on a project that I built using the nRF52DK and then created a custom PCB. The software I wrote works on the DK with a breakout board for the RTC and the custom PCB should have the same connectivity. I am getting a negative acknowledgement error from the RTC over RTT (8201) whenever trying to send or receive data from the RTC. I am not sure how to work on troubleshooting this.
Is there anything that may be different from purchased 52832 SoC vs the ones that come on the nRF52DK? I found some info on port protection, but that seems to only limit the debugger, and I've been able to access flash memory of the custom SoC and use RTT so I don't think this could be limiting anything.
Myself and multiple others have checked all the connections and components to be correct. I used a voltmeter to check the SDA and SCL lines to be properly pulled up on the correct 52832 pins. I get the same error on multiple boards, which makes me think it is a systematic error but am not sure how to further investigate this. Are there any other checks I could do? Potentially using an oscilloscope or some other method of checking hardware?
This is my first attempt at translating from a DK to a custom PCB so any general advice would also be appreciated. I can also post the PCB schematic/software if that would help, but right now I'm mostly looking for general advice on what to try.
Thanks!
