BLE Stability over time

RE: BLE Stability over time

Simonr — Mon, 11 Apr 2022 13:17:54 GMT

How much is the difference in the range if you wait or not? Could be that you have another device running on the 2.4GHz band that causes some interference at first, but that would mean it also only is active at the beginning of your tests. It's hard to explain without more details I must say

Best regards,

Simon

RE: BLE Stability over time

Albin — Mon, 11 Apr 2022 09:53:01 GMT

Hello,

the difference is when we wait a few minutes or not before doing the range test.

The other device is also a NRF52832 we update the PHY parameters after 5s from 40ms connection interval to 300ms.

I also don't understant why waiting would change anything but i wanted to be sure

RE: BLE Stability over time

Albin — Mon, 11 Apr 2022 09:46:04 GMT

No we try to keep the same parameters every time we to a range test

RE: BLE Stability over time

hmolesworth — Thu, 07 Apr 2022 16:35:29 GMT

"the more we wait" - out of interest, does the physical orientation or height above ground or relative planes change as the two BLE radios (antennas) are moved apart?

RE: BLE Stability over time

Simonr — Thu, 07 Apr 2022 12:50:26 GMT

This sounds very strange to me. Can you provide some more details on how long you wait after you have connected and how much the range increases? You say one device is the nRF52832, but what is the other device? A phone, another nRF52 device/DK?

The only thing I can think of increasing the range during a connection is a PHY and connection parameter update, but this usually is done as soon as the devices connect and agree on the best connection parameters and PHY. And the nRF52832 doesn't even support the BLE long range features, so the range increase shouldn't be very noticeable.

Best regards,

Simon