Long range scan with 52840 and SDK16

[Avi]

With SDK 15, the long range scan parameters were:

static ble_gap_scan_params_t const m_scan_params =
{
#ifdef BOARD_PCA10056
.extended = 1,
.active = 1,
.interval = SCAN_INTERVAL,
.window = SCAN_WINDOW,
.filter_policy = BLE_GAP_SCAN_FP_ACCEPT_ALL,
.scan_phys = BLE_GAP_PHY_CODED,
.timeout = SCAN_DURATION,

It doesn't work with SDK16

Is there any change?

[Vidar Berg]

Hi,

The scan parameters should still be the same. I recently enabled coded PHY for the blinky examples in SDK 16.0.0, maybe you could go over the changes I made and see if you can spot any relevant differences compare to your implementation?

Attachment:

central_and_peripheral_coded_phy.zip

[Avi]

I am using the example of ble_app_uart_c (SDK16).

It works as is with BLE4 detection.

I tried to change the following:

p_scan_ctx->scan_params.scan_phys = BLE_GAP_PHY_CODED;
p_scan_ctx->scan_params.extended = 1;

But I get resets.

[Vidar Berg]

Please open the diff in my attachment and review the changes I made. It shouldn't be much different from the ble_app_uart_c example. You don't have to make code changes inside the scan module (nrf_ble_scan.c).

[Avi]

This is what I did. I get resets 

[hmolesworth]

In a recent post this tip was useful:

// <o> NRF_BLE_SCAN_BUFFER - Data length for an advertising set. 
#ifndef NRF_BLE_SCAN_BUFFER
#define NRF_BLE_SCAN_BUFFER 31 // Change to BLE_GAP_SCAN_BUFFER_EXTENDED_MIN for coded PHY
#endif

I believe BLE_GAP_SCAN_BUFFER_EXTENDED_MIN is 255

See scanning-and-advertising-parameter-setting-for-coded-in-ble_app_att_mtu_throughput

[Avi]

Yes, this solved the problem.

Thank you!