How to use on_notification fuction to get notification

[scps990707]

I am a python beginner, I read a lot of related questions, but they all ask us to look heart_rate_collector.py , but heart_rate_collector.py did't not have any example, i really don't understand how to used it.

def on_notification(self, ble_adapter, conn_handle, uuid, data):

data should be the thing i want to get,is that right?

 

[Einar Thorsrud]

Have you enabled notifications with enable_notification()? If not, you will not get any notifications, and on_notification() will never be called

[scps990707]

I want to record the notify in 0XFFF6 like image below

but now I have enable notification(),still can't received the data.

[Einar Thorsrud]

I see from the log that you find that characteristic during service discovery. Then the next is to enable notifications using enable_notification with that UUID.

[scps990707]

    def connect_and_discover(self):
        scan_duration = 5
        params = BLEGapScanParams(interval_ms=200, window_ms=150, timeout_s=scan_duration)
        message = "We are connected!\r\n"

        self.adapter.driver.ble_gap_scan_start(scan_params=params)

        try:
            new_conn = self.conn_q.get(timeout=scan_duration)
            self.adapter.service_discovery(new_conn)
            self.adapter.enable_notification(new_conn, self.nus_tx)

            return new_conn
        except Empty:
            print("No device advertising with name {TARGET_DEV_NAME} found.")
            return None

Yes ,I have enable notifications using enable_notification in the "def connect_and_discover(self):"

Is  enable_notification() return anything? or how do I know this function is working? 

[Einar Thorsrud]

Yes, it does return a status. You can see that from looking at the implementation. What is self.nus_tx? Is it the right UUID?