hmBle
The "Device App" communicates with the "Side Service" through the hmBle module using the device's Bluetooth communication capabilities.
tip
For a complete example of Bluetooth communication, please refer to Bluetooth Communication
Method
createConnect(callback)
Create connection
Type
(callback: (index: number, data: object, size: number) => void) => void
Parameters
| Callback parameter | Description | Required | Type |
|---|---|---|---|
| index | subpackage number | NO | number |
| data | received data | NO | object |
| size | length of data received | NO | number |
disConnect()
Disconnects
Type
() => void
send(data, size)
Send a message
Type
(data: object, size: number) => void
Parameters
| Parameters | Description | Required | Type |
|---|---|---|---|
| data | data to be sent | NO | object |
| size | length of data to be sent | NO | number |
connectStatus()
Query connection status
Type
() => Result
Result
| Description | Type |
|---|---|
connection status true connected, false not connected | boolean |
addListener(callback)
Register a connection status listener
type
(callback: (status: boolean) => void) => void
Parameters
| Callback parameter | Description | Type |
|---|---|---|
| status | connection status | boolean |
removeListener
Cancel the connection status listener
type
() => void
Code example
// Create Connection
hmBle.createConnect(function (index, data, size) {
// Receive message callback, return the received message as it is
hmBle.send(data, size)
})
// Disconnection
hmBle.disConnect()
// Print Bluetooth connection status
console.log(hmBle.connectStatus())
// Register to listen for connection status
hmBle.addListener(function (status) {
// Print connection status
console.log(status)
})