It is possible to set a timeout between sd_ble_gap_connect() till BLE_GAP_EVT_CONNECTED event?

[Jagadeep Ram]

Hi,

I'm using nRF52840 as a central and nRF52832 as a peripheral device. I have disabled automatic connect requests in central when a required peripheral device is found.

nrf_ble_scan_init.connect_if_match = false;

I have to verify certain data transferred in the advertisement packet and then decide if the peripheral device shall be connected or not.

I manually make a connection request using the function sd_ble_gap_connect()

There can be more than one central device receiving the advertisement packets and want to connect to a peripheral device at the same time.

For example, let us consider central devices A and B have sent a connection request to peripheral P and A gets connected to P.

But the device B is stuck forever and not able to perform any scanning even after restarting the scan (using nrf_ble_scan_stop() and nrf_ble_scan_start())

Is there a timeout parameter that I can set and inform SD that wait for maximum time to establish a connection to a peripheral device and upon timeout resume scanning?

More information:

Central device: nRF52840, SDK16

Peripheral device: nRF52832, SDK16

[Edvin]

Hello,

I don't think there is an automatic timeout value that you can set when calling sd_ble_gap_connect(), but you can use sd_ble_gap_connect_cancel() to stop the connection attempt. If you start a timer when you call sd_ble_gap_connect, you can use it's timeout handler to call sd_ble_gap_connect_cancel().

Best regards,

Edvin

[Jagadeep Ram]

It worked, but I also needed to start scanning in timer interrupt handler after calling sd_ble_gap_connect_cancel()

[Francisco Fonck]

You can just simply use:

err_code = sd_ble_gap_connect_cancel();
APP_ERROR_CHECK(err_code);