GATT CONN TIMEOUT

RE: GATT CONN TIMEOUT

Simonr — Fri, 09 Aug 2019 05:33:24 GMT

Hey Mike

Please open a separate post on this if you want additional support, as we try to keep one thread per subject. You can try updating the SoftDevice of your nRF52 devices, but seeing as you struggle discovering the BLE device this very well can be another problem.

Best regards,

Simon

RE: GATT CONN TIMEOUT

MikeT — Thu, 08 Aug 2019 12:24:55 GMT

We are seeing this on Huawei p10 lite as well
we previously used:
nrf51822 (softdevice: S110, v7.1.0)

and now we use:
nrf52832 (softdevice: S132, v3.0.0)
nrf52840 (softdevice: S140, v6.0.0)

The behavior is worse with the newer nrf52 chipset.

The android NRF tool hardly finds the BLE device and if it finally (after restarting ble, wifi, etc) discovers it, it returns 133 during connection.

Is there any configuration or something similar we have to do and we might have missed?

I know Huawei is horrible, but nevertheless we have lots of users using that phones, and we want to provide them the best experience possible.

Cheers,
Mike

RE: GATT CONN TIMEOUT

mijiale — Tue, 29 Jan 2019 12:18:13 GMT

Huawei mate9,honor 9,Huawei P20 pro and so on. All Huawei phones used to test for me have this issue.

RE: GATT CONN TIMEOUT

Simonr — Tue, 29 Jan 2019 09:39:47 GMT

This is probably the same compatability error that caused the previous error. As I said we are working on patching this issue on all Android phones. Could you please specify which Huawei model you are using? Also do you know if the data write still happens even though you don't get the confirmation?

Best regards,

Simon

RE: GATT CONN TIMEOUT

mijiale — Tue, 29 Jan 2019 03:09:02 GMT

Other type of cell phone has “Data written to descr",but there don't have this message from Huawei.

RE: GATT CONN TIMEOUT

mijiale — Tue, 29 Jan 2019 02:44:58 GMT

Hi,Simonr

Thank you very much for your reply.when I set the NRF_SDH_BLE_GATT_MAX_MTU_SIZE to 23,the connection will remain.If the value of NRF_SDH_BLE_GATT_MAX_MTU_SIZE is set larger than 23,the connection will break off.

RE: GATT CONN TIMEOUT

Simonr — Mon, 28 Jan 2019 13:04:07 GMT

Error 133 is a known compatability error for a lot of Android phones, although we have mostly patched this problem, there still are some phones who gets this error. What Huawei model is it that you're using? I suggest you just use a phone that doesn't have this issue as there is no guaranteed fix. You could try adding some delays (buffers) after connection, to try and prevent this timeout, but this is not guaranteed to work.

Best regards,

Simon