BSP_INDICATE_SCANNING - period 2 s or 4.4 s

[Jan Kinander]

In the description of example BLE Heart Rate Collector, it says that it can indicate state BSP_INDICATE_SCANNING and state BSP_INDICATE_CONNECTED.

In the description of BSP indication states for PCA10040 and PCA10056 it says that BSP_INDICATE_SCANNING is LED1 blinking with period 2 seconds and duty cycle 10 %.

When I run the BLE Heart Rate Collector example on PCA10040, LED1 is blinking with period 4.4 seconds and duty cycle 10 %. This is strange since

1. Accordning to the description of BSP indicate states, this blinking indicates BSP_INDICATE_ADVERTISING_SLOW.

2. The description of the example does not mention BSP_INDICATE_ADVERTISING_SLOW.

3. A Heart Rate Collector wouldn't advertise.

Can you explain this?

 

[Jan Kinander]

You can find the Heart Rate Collector exampel in folder nRF5_SDK_17.1.0_ddde560\examples\ble_central\ble_app_hrs_c

I can see that I used the wrong words. What I was trying to say is that only BLE peripherals do advertise, never centrals - they scan, so the fact that this central indicates BSP_INDICATE_ADVERTISING_SLOW violates both the description of the exampel and fundamental BLE principels.

[Simonr]

Okay, so the central example indicates that it is advertising only by the LED1 blinking every ~4.4 seconds, is that so? The example seems to behave as intended, but I agree that the LED seems to blink way slower than at a 2 second period. How exactly are you measuring it to be 4.4 seconds?

I think this might be a documentation bug, where the period should be longer when indicating scanning than when advertising. I can assure you that the Heart Rate Collector (ble_app_hrs_c) does not actually advertise, and it's only scanning on my end at least.

Best regards,

Simon

[Jan Kinander]

Yes, it does SCANNING as it should, but according to your documentation it indicates ADVERTISING_SLOW (period 4.4 s, measured with a stopwatch: 10 flashes in 44 seconds).

So, I can see that you have to initiate a major investigation here! How do all other examples on PCA10040 and PCA10056 indicate scanning? Do they use period 2 s or period 4.4 s? What must be corrected, the documentation or the Heart Rate Collector exampel? I can't imagine that you are happy with the current situations, since it causes a lot of confusion (and our long conversation ...).

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