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data sharding ​

When using Bluetooth for data transmission, sometimes due to the limitation of low-power Bluetooth data size, we may need to fragment the data for each transmission, otherwise problems may occur

1. fetchCallback ​

js
import printease from 'printease'
const fragmentSize = 20;
const dataBuffer = new ArrayBuffer(100);
function processBuffer(theBuffer, next) {
    if (!theBuffer.byteLength) {
        console.error('send data complete')
        return;
    }
    // Here is just an example of sending Bluetooth data, please modify it according to your own situation.
    writeBLECharacteristicValue({
        deviceId: deviceId,
        serviceId: serviceId,
        characteristicId: characteristicId,
        value: theBuffer,
        success: () => {
            const nextChunk = next.next();
            processBuffer(nextChunk.value, next);
        }
    })
    
}
printease.dataProcessing.fetchCallback(dataBuffer, fragmentSize, processBuffer);

"fragmentSize" is the fragment size, it is recommended to set 20.

writeBLECharacteristicValue is the method of sending data for you, you can modify it according to your own situation, here is just an example.