writeWithoutResponse

[fredrikeldh]

We would like the ability to write characteristic data without waiting for the remote device to respond, thus increasing data throughput.

I think there are two ways to do this: a function setWriteType(), matching the Android API, or a function writeCharacteristicWithoutResponse(), which calls setWriteType behind the scenes, so to speak.

Relevant links: http://evothings.com/forum/viewtopic.php?f=8&t=1479 http://stackoverflow.com/questions/24135682/android-sending-data-20-bytes-by-ble https://github.com/fishkingsin/BLEDialogTool/blob/master/src/com/fishkingsin/ble/dialogtool/BLEService.java

[fredrikeldh]

How could this be implemented on iOS?

[fredrikeldh]

Android implementation here: https://github.com/fredrikeldh/cordova-ble/tree/writeWithoutNotification

[ghost]

Android implementation merged into master branch.

TODO: Implement on iOS (is supported) and test.

[ghost]

Updated EasyBLE library with function writeServiceCharacteristicWithoutResponse.

Updated file is here:

https://github.com/evothings/evothings-libraries/blob/master/libs/evothings/easyble/easyble.js

Documentation comment:

/**
 * Write value of a characteristic for a specific service without response.
 * This faster but not as fail safe as writing with response.
 * Asks the remote device to NOT send a confirmation message.
 * Experimental, implemented on Android.
 * @param {string} serviceUUID - UUID of service that has the characteristic.
 * @param {string} characteristicUUID - UUID of characteristic to write to.
 * @param {ArrayBufferView} value - Value to write.
 * @param {evothings.easyble.emptyCallback} success - Success callback: success().
 * @param {evothings.easyble.failCallback} fail - Error callback: fail(error).
 * @public
 * @instance
 * @example
 *   device.writeServiceCharacteristicWithoutResponse(
 *     serviceUUID,
 *     characteristicUUID,
 *     new Uint8Array([1]), // Write byte with value 1.
 *     function()
 *     {
 *       console.log('BLE data sent.');
 *     },
 *     function(errorCode)
 *     {
 *       console.log('BLE writeServiceCharacteristicWithoutResponse error: ' + errorCode);
 *     });
 */

[ghost]

Implemented writeCharacteristicWithoutResponse on iOS in this commit: https://github.com/evothings/cordova-ble/commit/4fd629080e1e4aa3a5a7ecc95b3ea35597a1a752

Made new release of plugin: https://github.com/evothings/cordova-ble/releases/tag/1.4.3

Function writeCharacteristicWithoutResponse tested working on iOS and Android.

Closing issue.