使用 IONIC CAPACITOR 应用程序在 BLE 设备上写入 20 字节命令

Question

Hi there guy's i'm developing an application that connects to a BLE device. Now i need need to write theese 20 Bytes on the device using BleClient.write

34h 01h 50h 4Fh 4Ch 49h 54h 45h 43h 00 00 00h 00h 00h 00h 00h 00h 00h 00h 00h

but the write function ask me DATAVIEW... how i can send theese bytes to the device?

BleClient.write(device.deviceId, '02366e80-cf3a-11e1-9ab4-0002a5d5c51b', '340a1b80-cf4b-11e1-ac36-0002a5d5c51b', '34h 01h 50h 4Fh 4Ch 49h 54h 45h 43h 00 00 00h 00h 00h 00h 00h 00h 00h 00h 00h');

Answer 1

According to the documentation of the write method you can create a dataview using the numbersToDataView helper method. It accepts an array of numbers.

The usage section even includes an example which uses the helper:

await BleClient.write(device.deviceId, POLAR_PMD_SERVICE, POLAR_PMD_CONTROL_POINT, numbersToDataView([1, 0]));
console.log('written [1, 0] to control point');

In your case it is probably

numbersToDataView([34h, 01h, 50h, 4Fh, 4Ch, 49h, 54h, 45h, 43h, 00, 00, 00h, 00h, 00h, 00h, 00h, 00h, 00h, 00h, 00h])