Excessive number of pending callbacks: 501 (React-Native)

Question

I am using react-native-ble-plx library to connect to Xsens DOT sensors. The sensors transmit data at different data output rates (4Hz, 10Hz,20Hz,60Hz[default]) over Bluetooth.

When I set the Data output rate below 20Hz the application runs fine but when I set it to 60Hz, the application hangs, and all the touch options and components freeze. On the console I am able to see a warning: Please report: Excessive number of pending callbacks: 501. Some pending callbacks that might have leaked by never being called from native code.

I am using the monitorCharacteristics() method which returns a promise object. What should I do so that the application doesn't freeze? Also is there a way where I can monitor the performance of the app?

bleManager.monitorCharacteristicForDevice(props.device.id,serviceUUID,charUUID_N,(err,char)=>{
    if (err){
        console.error(err)
    }
    console.info(char.value)  
})

Console logs

@AbdalrahmanValabji I have added the screenshot and code snippet in the post — aditya ghumatkar, Sep 13 '22 at 12:33
dont link your console logs image, instead put your log inside the question. — Toni Tegar Sahidi, Sep 14 '22 at 02:22
is there a loop running this code, can we use await with the function? like await bleManager..... — Abdalrahman Valabji, Sep 15 '22 at 13:00
Hi, I'm facing the same ... But with the startDeviceScan function ... How do you handle your list of devices up to date ? It seems that there's too much callback called ... How did you do ... In order to then select the right device to connect to — Seba99, Oct 27 '22 at 11:14
@Seba99 I used startdeviceScan on a click of button and used setTimeOut method to stop scanning after 10 seconds. I created a new list of all the detected devices which I then displayed. — aditya ghumatkar, Nov 16 '22 at 09:45

score 0 · Answer 1 · answered Aug 15 '23 at 10:21

@Seba99 I used scanningOptions?: ScanOptions for handle this. reportDelay should be between 0 and 5000

    BleManager.scan([], 0, true, { reportDelay: 1000, phy: 
    BleScanPhyMode.ALL_SUPPORTED }).then(() => {
    // Success code
    console.log('Scan started');
    });

documentation: https://developer.android.com/reference/android/bluetooth/le/ScanSettings.Builder#setReportDelay(long)

Excessive number of pending callbacks: 501 (React-Native)

1 Answers1