<btleCharacteristic variable>.ChangeOfValue (Function)

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<btleCharacteristic variable>.ChangeOfValue (Function)

In french: <Variable btleCaractéristique>.ChangementValeur

Enables or disables detection of changes in the value of a Bluetooth Low Energy characteristic.

For example, this makes it possible to generate a notification when a temperature sensor detects any changes.

New in version 2025

This function is now available for WINDEV applications in Windows.

Example

characteristic is btleCharacteristic
characteristic.ChangeOfValue(ProcDetectChange)
// ===========================
PROCEDURE CB_ChangeValue (characteristic is btleCharacteristic <useful> , bufValue is Buffer)
// Get value and display it in a Static Text control
sBuf is ANSI string = bufValue
STC_SubscriptionValue = sBuf

crtc is btleCharacteristic
crtc.ChangeOfValue()

Syntax

Asking to be notified whenever the value of a characteristic changes Hide the details

<Characteristic>.ChangeOfValue([<WLanguage procedure>])

<Characteristic>: btleCharacteristic variable

Name of the btleCharacteristic variable corresponding to the characteristic to use.

<WLanguage procedure>: Name of the WLanguage procedure

Name of the WLanguage procedure ("callback") called when a characteristic changes on the device. For more details on this procedure, see Parameters of the procedure used by <btleCharacteristic variable>.ChangeOfValue.

Stopping the detection regarding the change of characteristic value Hide the details

<Characteristic>.ChangeOfValue()

<Characteristic>: btleCharacteristic variable

Name of the btleCharacteristic variable corresponding to the characteristic to use.

Related Examples:

Cross-platform examples (WINDEV Mobile): WM Bluetooth 4

[ + ] This example explains how to use the Bluetooth Low Energy functions (Bluetooth LE): BTLExxx.

It is an application allowing you to find the nearby BTLE devices, to connect to them and to interact with the proposed services.

Component: wd300android.aar