unsubscribe
Syntax
Description
Examples
Subscribe and Unsubscribe to a Characteristic on a Bluetooth Low Energy Peripheral Device
Subscribe to a characteristic that supports notification or indication. Unsubscribe after you finish working with the characteristic.
Create a connection to a nearby Bluetooth Low Energy peripheral device.
b = ble("DemoDev")
b = ble with properties: Name: "DemoDev" Address: "FF548EA5658F" Connected: 1 Services: [5×2 table] Characteristics: [10×5 table] Show services and characteristics
Create a characteristic object that represents the "Heart Rate Measurement"
characteristic.
c = characteristic(b,"Heart Rate","Heart Rate Measurement")
c = Characteristic with properties: Name: "Heart Rate Measurement" UUID: "2A37" Attributes: "Notify" Descriptors: [1x3 table] DataAvailableFcn: [] Show descriptors
This characteristic supports "Notify"
.
Start receiving notifications using subscribe
.
subscribe(c)
Read from the characteristic to check that you are receiving data.
read(c)
ans = 1×19
23 14 1 187 1 186 1 185 1 184 1 183 1 182 1 181 1 180 1
After you finish working with the characteristic, disable notifications using unsubscribe
.
unsubscribe(c)
Input Arguments
c
— Characteristic of Bluetooth Low Energy peripheral device
characteristic object
Characteristic of Bluetooth Low Energy peripheral device, specified as a characteristic
object.
Example: unsubscribe(c)
unsubscribes from notification and
indication on the characteristic object c
.
Version History
Introduced in R2019b
See Also
characteristic
| subscribe
| read
| write
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