NRF52810 and NRF52832 HID bluetooth have a different polling rate.

RE: NRF52810 and NRF52832 HID bluetooth have a different polling rate.

Hung Bui — Tue, 26 Aug 2025 13:42:38 GMT

Hi Alex,
Which connection interval was used in the connection ? If it's 7.5ms I don't see a problem for the sniffer to capture that.
Or lower interval with LLPM used ?

One simple test could be to use peripheral_lbs sample and send a lot of notification as quick as possible and see if you have any limit with the nRF52810, but I don't see it could be a problem.
The nRF52810 has only 24kB RAM, you may want to check if there is any configuration that limit the BLE buffer.

If you can reproduce the issue with a nRF5 DK, you can send us and we can test here with our sniffers.

RE: NRF52810 and NRF52832 HID bluetooth have a different polling rate.

Pivic_123 — Mon, 25 Aug 2025 21:42:28 GMT

I have done more testing.
On the NRF52810, I have only one pin available for toggling, and I observe that the bt_hids_inp_rep_send function is called at an interval of 4ms or less. Same rate on the NRF52832.

The sniffer doesn't seem to go fast enough to detect the polling rate. Gamepadal still reports the same latency: 8ms for the 832 and 38ms for the 810.

I'm running the same main.c, I can't find anything in the overlays that could account for this behaviour. Could it be down to a difference in Zephyr for both devices?

I keep looking.

RE: NRF52810 and NRF52832 HID bluetooth have a different polling rate.

Pivic_123 — Tue, 19 Aug 2025 21:09:43 GMT

I moved the devices as close as possible to the sniffer. I manage to see the interval update at "6" (7.5ms) on both the NRF52832 and the NRF52810.

I'll use the pins to see the differences in behavior between the 832 and 810 and report back.

Thank you.

RE: NRF52810 and NRF52832 HID bluetooth have a different polling rate.

Hung Bui — Mon, 18 Aug 2025 14:36:23 GMT

Hi Alex,
It doesn't seems the sniffer could capture all the packets. Many packets missing.
I would suggest to keep it close to the 2 devices. The updated connection interval request is not visible.

To measure the latency I would also suggest to use GPIO so when you trigger a button press you turn on a GPIO at each step of the process until the BLE packet is sent to see if there is any difference.

RE: NRF52810 and NRF52832 HID bluetooth have a different polling rate.

Pivic_123 — Fri, 15 Aug 2025 15:29:22 GMT

Hi, I have made 2 traces, one for the NRF52832, and one for the NRF52810.
devzone.nordicsemi.com/.../832.pcapng devzone.nordicsemi.com/.../810.pcapng

RE: NRF52810 and NRF52832 HID bluetooth have a different polling rate.

Pivic_123 — Fri, 15 Aug 2025 14:45:50 GMT

Hi,

Thank you. I'll setup a sniffer and let you know.

To measure the latency I have been using: Gamepadla

The button press check is identical between both hardware as I'm using the same code.

Thank you!

RE: NRF52810 and NRF52832 HID bluetooth have a different polling rate.

Hung Bui — Fri, 15 Aug 2025 14:18:08 GMT

Hi Alex,
I don't think we have such limitation on the NRF52810 .

Could you try to capture a sniffer trace so we can see what happens over the air ?

Please double check if the button interrupt is correctly capture the button press then send to BLE and there is no delay with that?

How did you measure the latency of 38ms ?