react-native-zdh-bluetooth

Currently only support ios and require react-native >= 0.40.0

##Installation

1. Install library from npm

   npm install react-native-zdh-bluetooth --save

2. Link native code

   react-native link react-native-zdh-bluetooth

##Usage

import ble from 'react-native-zdh-bluetooth'

##Methods

scan(UUIDs,allowDuplicates,showPowerAlert)

Scaning peripherals. See method registerDiscoverPeripheral().

Arguments The parameter is optional the configuration keys are:

• UUIDs - Array of String - [default empty] If you confirm the service UUID in the broadcast information,fill the UUID,block out you don't want, otherwise not.
• allowDuplicates - Boolean - [default false] Allow scanning duplicates.
• showPowerAlert - Boolean - [default true] Show or hide the alert if the bluetooth is turned off during initialization.

Examples

ble.scan();
// ble.scan(['XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX']);

stopScan()

Stop the scanning.

Examples

ble.stopScan();

connect(identifier)

Connect to a specified peripheral.

Arguments

• identifier - String - Using the method you have to obtain the identifier before ,from method registerDiscoverPeripheral().

Examples

ble.connect('XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX')

disconnect()

Disconnect from a peripheral.

Examples

ble.disconnect();

write(msg,UUID)

Write to the specified characteristic.

Returns a Promise object.

Arguments

• msg - String - The data to write hexstring.(e.g. 'ABCDEF0123456789')
• UUID - String - [default empty] If you confirm the write more than one characteristic,fill in your specified write characteristic UUID , otherwise not.

Examples

// ble.write('ABCDEF0123456789')
ble.write('ABCDEF0123456789','XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX')
  .then((result) =>{
    console.log(result.writeUUID+' : ' +result.message);
  })
  .catch((error) =>{
    console.log(error);
  })

• result.writeUUID - String - write characteristic UUID.
• result.message - String - write state message.
• error - error.

read(UUID)

Read value for the specified characteristic.

Returns a Promise object.

Arguments

• UUID - String - the UUID of the read characteristic.

Examples

ble.read('XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX')
  .then((result) =>{
    console.log(result.readUUID+' : '+result.value);
  })
  .catch((error)=>{
    console.log(error);
  })

• result.writeUUID - String - read characteristic UUID.
• result.value - String - characteristic value.
• error - error.

Events

registerUpdateConnectionStatus(callback)

Register a callback to monitor the connection status.

The status changed callback.

Examples

ble.registerUpdateConnectionStatus((param)=>{
  console.log(param.connect+','+param.desc);
});

• param.connect - Boolean - Is connect or not.
• param.desc - String - Error message description.

registerDiscoverPeripheral()

Register a callback to monitor discover peripherals.see method connect().

Once found a peripheral callback.

Examples

ble.registerDiscoverPeripheral((param)=>{
  console.log(param.name+','+param.identifier);
});

• param.name - String - Peripheral's name.
• param.identifier - String - Peripheral's identifier.Using connection,see method connect().
• param.RSSI - Number - Peripheral received signal strength indicator.
• ... - (broadcast information)

registerDidUpdateValueForCharacteristic()

Register a callback to monitor characteristic value.

Characteristic value did update callback.You can get all peripheral sending data from here.

Examples

ble.registerDidUpdateValueForCharacteristic((param)=>{
  console.log(param.UUID+' : ',param.value);
});

• param.UUID - String - Characteristic UUID.
• param.value - String - Characteristic value.