nRF9160 lte_ble_gateway sample problem on custom board

RE: nRF9160 lte_ble_gateway sample problem on custom board

bbslhb — Thu, 07 Mar 2019 02:23:48 GMT

The reset pin of nRF52840 and nRF9160 are connected to the same reset button on our custom board.

I tried reset nRF52840 and nRF9160 with latency on nRF9160DK and got two different error logs which are different with mine:

RE: nRF9160 lte_ble_gateway sample problem on custom board

Sigurd — Wed, 06 Mar 2019 14:08:35 GMT

Hi,

If the nRF9160 and the nRF52840 is started at different times, the UART communication between them could get out of sync, and you will get this error. The error can also be seen using the nRF9160-DK under certain conditions. The workaround for the nRF9160-DK is to reset the chips at about the same time:

1) Set the PROG/DEBUG switch to nRF52
2) Push the reset button
3) Set the PROG/DEBUG switch to nRF91
4) Push the reset button

Do you see this issue on the custom board, if you power up the nRF52840 and the nRF9160 at about the same time ?

Note that we are currently working on a software solution for this issue.

RE: nRF9160 lte_ble_gateway sample problem on custom board

bbslhb — Wed, 06 Mar 2019 08:22:26 GMT

I can get the same error log after I esased nRF52840 on normal working nRF9160DK.

So it seemed that there is problem with uart communication between nRF52840 and nRF9160 according to the error code.