RPU is unresponsive

RE: RPU is unresponsive

erichotterbeefcurry — Mon, 24 Jul 2023 16:09:34 GMT

Hi jrt, thank you for getting back! I did what you suggested and made some software changes too, it started to work for me. We are now getting a SPI line error but that's unrelated to RPU fault. Thank you so much!

-Eric

RE: RPU is unresponsive

jrt — Sat, 22 Jul 2023 09:29:38 GMT

Hi Eric,

The first tests I made, I used only 22µF capacitor on the output of the battery charger. Then I had the error because of the current peak needed by the 7002 is too high for the capacitor. So to be sure to deliver at least 300ma to the 7002 without a voltage drop I plug a 500mah battery.

RE: RPU is unresponsive

erichotterbeefcurry — Fri, 21 Jul 2023 19:38:04 GMT

Hi jrt, I'm getting the same error. Could you elaborate on how you stabilised the VBAT supply to accept higher current? We are working on a custom board too. Looking forward to your kind reply!
Update: For context, our custom board has a lot of other components... if I just use the wifi (7002), it seems to work as normal, but once I put my code to the bigger project code with many new device tree nodes and other prj.confs, it gives me the error of "RPU is not ready for more than 1 sec".
-Eric

RE: RPU is unresponsive

jrt — Wed, 31 May 2023 18:33:08 GMT

I reply to my own question.

I am not sure of the meaning of the error messages but I searched an answer about the supply of the nrf7002. I stabilised the VBAT supply to accept higher current, now it works.

So I solved the problem.