BLE hci_lpuart hangs and crashes app on nrf sdk 2+ (works with 1.9.1)

RE: BLE hci_lpuart hangs and crashes app on nrf sdk 2+ (works with 1.9.1)

CRD — Tue, 29 Nov 2022 15:40:58 GMT

SUCCESS!!

Okay so after writing the last update I wanted to double check that hci_lpuart actually did work when built with both 1.9.1 and 2.1.2.

I rebuilt hci_lpuart with sdk v1.9.1 and flashed it to the nrf52840 and now BLE works, also I can still build my main app with the 2.1.2 sdk and it works fine.

Solution for now: Build hci_lpuart app for the nrf52840 chip with SDK v1.9.1. The main app flashed to the nrf9160 can be built with newer sdk versions.

RE: BLE hci_lpuart hangs and crashes app on nrf sdk 2+ (works with 1.9.1)

CRD — Tue, 29 Nov 2022 14:36:22 GMT

Thanks for taking a look. I updated the previous post just now. I flashed a few times on my board that was working and all of a sudden it has the same issue, and I can't seem to revert it even if I flash the app firmware that was working before.

If there is a patch or something that can be tested to hot fix this, please let me know and I can test it. We were pushing to release prototypes soon so now my only other consideration is to reformat our entire project to build with sdk 1.9.1.

For some extra info:
- I have built hci_lpuart for the nrf52840 with 1.9.1 and with 2.1.2 and it has worked with both of those builds.

- Reproduced on multiple boards and with multiple apps including the default lte_ble_gateway app

- Seems to occasionally work, then after flashing (no idea what changed in configs or app) stops working and will not work anymore even after re-flashing with different firmware.

RE: BLE hci_lpuart hangs and crashes app on nrf sdk 2+ (works with 1.9.1)

Øivind — Tue, 29 Nov 2022 13:10:34 GMT

Hi, we are aware of some issues with the lpuart in newer SDK releases, I will look into whether this is the same issue and get back to you.

It is interesting that you are only seeing issues on one of your boards, thank you for that update.

RE: BLE hci_lpuart hangs and crashes app on nrf sdk 2+ (works with 1.9.1)

CRD — Mon, 28 Nov 2022 17:56:45 GMT

UPDATE:

I have two nrf9160dks and only one of them has this issue, the other board boots and starts BLE with no issue using the same firmware on both boards.

Board 1 (works as expected):

PCA10090

1.0.1

2021.37

Board 2 (Ble does not work):

PCA10090

1.0.0

2021.15

Now it seems I will need to figure out what is different between these two boards. Hopefully this is just a quick solder update?

Update to the update: After flashing the board that was working a few times it no works with BLE either (same k_sem_take error at hci_core.c:327). Even if I load the firmware that was working for bit. So now I'm feeling like this is a software issue and not a hardware issue.