Matter + BLE scanning

[sfemat]

Hi,

I see the Matter CHIP integration uses BLE for commissioning, so to advertise a ble service the documentation advises to use NUS.

What about scanning for ble devices and connecting to them?

[Amanda Hsieh]

Hi, 

You can use the CHIP Tool to scan and commission. See Working with the CHIP Tool. 

Regards,
Amanda H.

[sfemat]

No, I meant I need to scan for ble devices from the nrf5340 and connect to them.

[Amanda Hsieh]

Hi, 

sfemat said:

I also tried to integrate this sample but I'm still getting error -5 from bt_le_scan_start.

What sample are you using?

I see the Matter CHIP integration uses BLE for commissioning, so to advertise a ble service the documentation advises to use NUS.

What about scanning for ble devices and connecting to them?

In the Matter: Door lock sample which can advertise with NUS. See Matter Bluetooth LE with Nordic UART Service. You also can connect and test with  nRF Toolbox on your Android (Android 11 or newer) or iOS smartphone (iOS 16.1 or newer). See Testing door lock using Bluetooth LE with Nordic UART Service

-Amanda H.

[sfemat]

I am trying to integrate central_uart with my Matter application as you suggested but I'm getting uart_init failed (err -88).

It's failing here:

const struct uart_driver_api *api =
	(const struct uart_driver_api *)dev->api;

if (api->callback_set == NULL) {
	return -ENOSYS;
}

I've seen from another ticket that it could be the uart_cb callback passed to the init function but mine is exactly the same as the central_uart sample. My uart device is declared in the overlay like this (and it's not disabled):

/ {
    chosen {
        nordic,nus-uart = &uart0;
    };
};

so I'm not sure what could be causing this. I've also tried changing uart mode to async, interrupt driven and other params but with no luck, and meanwhile the scan is always returning error -5.

[sfemat]

Can I only add BLE advertising alongside a Matter application? I specifically need scanning like bt_le_scan_start

[Sigurd]

Hi,

Amanda is out of office. So I'm replying instead.

Did you get any errors when calling bt_le_scan_start() ?

[sfemat]

Yes, that's the function that I'm trying to use and it's throwing error -5 because of BLE Set Scan Parameters UNKNOWN HCI COMMAND