Bluetooth SPP

This is a node addon api package used for connecting other bluetooth through Bluethooth SPP. IMPORTANT! It supports for Windows platform. Now, we can use it as server and client.

Getting Started

This library is developed in C++ and support for Node.js.

Installation

Install this package into your project by below command

npm install @siva7170/ble-connection

Usage

Below code is sample for how to use it. Please see methods and its functionalities below sections.

const bleConnection = require('@siva7170/ble-connection');

const bleConnInstance = new bleConnection.BLEConnection();

Client Methods

Initiate(successCallback,failureCallback)

• successCallback:

  • Type: Function

• failureCallback:

  • Type: Function

It initializes the necessary things.

bleConnInstance.Initiate(()=>{
	console.log("Initiated!");
	// rest of the code
},()=>{
	console.log("Failed to initiate!");
});

Connect(bluetooth_addr, uuid, successCallback,failureCallback)

• bluetooth_addr:

  • Type: String

• uuid:

  • Type: String

• successCallback:

  • Type: Function

• failureCallback:

  • Type: Function

This method will try to connect to the given bluetooth address and uuid from bluetooth spp server.

// please use valid bluetooth address and UUID
bleConnInstance.Connect("00:00:00:00:00:E0","aaaaaaaa-aaaa-4444-cccc-999888999888",()=>{
	console.log("Connected!");
    // rest of the code
},()=>{
	console.log("Failed to connect!");
});

SendData(data, successCallback, failureCallback) (optional)

• data:

  • Type: String

• successCallback:

  • Type: Function

• failureCallback:

  • Type: Function

With this method, you can send data to client

bleConnInstance.SendData('Hi server!',(res)=>{
	console.log("Data sent: "+sData);
}, (err)=>{

});

OnReceiveData(onDataRecvCallback)

• onDataRecvCallback:
  • Type: Function

This method will be triggered when the data sent from bluetooth server

bleConnInstance.OnReceiveData((data)=>{
	console.log("Data receivedd: "+data);
});

Full Example

Please find full example of implementation

const bleConnection = require('@siva7170/ble-connection');

const bleConnInstance = new bleConnection.BLEConnection();

try{
    bleConnInstance.Initiate(()=>{
        console.log("Initiated!");

        bleConnInstance.Connect("00:00:00:00:00:E0","aaaaaaaa-aaaa-4444-cccc-999888999888",()=>{
            console.log("Connected!");
            let sData="Hi client";
            bleConnInstance.SendData(sData,(res)=>{
                console.log("Data sent: "+sData);
            }, (err)=>{

            });

            bleConnInstance.OnReceiveData((data)=>{
                console.log("Data receivedd: "+data);
            });
            
            sData="How are you?";
            bleConnInstance.SendData(sData,(res)=>{
                console.log("Data sent: "+sData);
            }, (err)=>{

            });
        },()=>{
            console.log("Failed to connect!");
        });
    },()=>{
        console.log("Failed to initiate!");
    });
}catch(e){
    console.error(e.toString());
}

Version 2

Client Usage

Below code is sample for how to use it. Please see methods and its functionalities below sections.

const bleConnection = require('@siva7170/ble-connection');

const bleConnInstance = new bleConnection.BLEConnection();

Methods

SetBtInfo(bluetooth_addr, uuid, timeout_for_reconnect, no_of_attempt_to_reconnect)

• bluetooth_addr:

  • Type: String

• uuid:

  • Type: String

• timeout_for_reconnect:

  • Type: Integer

• no_of_attempt_to_reconnect:

  • Type: Integer

It sets necessary things to BLE Connection before it initialize.

bleConnInstance.SetBtInfo("00:00:00:00:00:E0","aaaaaaaa-aaaa-4444-cccc-999888999888",5000,0);

GetStatus(statusCallback) (optional)

• statusCallback:
  • Type: Function

This method will give current state of BLE Connection when it is changed from one to another.

bleConnInstance.GetStatus((res)=>{
  console.log("Status: "+res);
});

MakeConnection(successCallback, failureCallback)

• successCallback:

  • Type: Function

• failureCallback:

  • Type: Function

It will make connection to device which is defined in SetBtInfo()

bleConnInstance.MakeConnection(()=>{
    console.log("Connected...!");
},
()=>{
    console.log("Failed to connect!");
});

IsConnected(successCallback, failureCallback) (optional)

• successCallback:

  • Type: Function

• failureCallback:

  • Type: Function

This method will be triggered when connection made to Bluetooth Server.

    bleConnInstance.IsConnected(()=>{
        console.log("Connection status: Connected!");
    },
    ()=>{
        console.log("Failed to connect!");
    });

SendDataToServer(data, successCallback, failureCallback) (optional)

• data:

  • Type: String

• successCallback:

  • Type: Function

• failureCallback:

  • Type: Function

With this method, you can send data to client

bleConnInstance.SendDataToServer('Hi server!',(res)=>{
	console.log("Data sent: "+sData);
}, (err)=>{

});

OnReceiveDataFromServer(onDataRecvCallback)

• onDataRecvCallback:
  • Type: Function

This method will be triggered when the data sent from bluetooth server

bleConnInstance.OnReceiveDataFromServer((data)=>{
	console.log("Data receivedd: "+data);
});

Full Example

Please find full example of implementation

const bleConnection = require('@siva7170/ble-connection');

const bleConnInstance = new bleConnection.BLEConnection();

try{
    bleConnInstance.SetBtInfo("00:00:00:00:00:E0","aaaaaaaa-aaaa-4444-cccc-999888999888",5000,0);

    
    bleConnInstance.GetStatus((res)=>{
        console.log("Status: "+res);
    });


    bleConnInstance.MakeConnection(()=>{
        console.log("Connected...!");
    },
    ()=>{
        console.log("Failed to connect!");
    });

    bleConnInstance.IsConnected(()=>{
        console.log("Connection status: Connected!");

       // INITIATE
      bleConnInstance.SendDataToServer("INITIATE",(res)=>{
        console.log("Initiating...!");
      }, (err)=>{

      });

      bleConnInstance.OnReceiveDataFromServer((data)=>{
        bleConnInstance.SendDataToServer("READY_SCAN",(res)=>{
          console.log("Ready scan...!");
        }, (err)=>{
                    
        });
      });
    },
    ()=>{
        console.log("Failed to connect!");
    });

}catch(e){
    console.error(e.toString());
}

Server Usage

Below code is sample for how to use it. Please see methods and its functionalities below sections.

const bleConnection = require('@siva7170/ble-connection');

const bleServerInstance = new bleConnection.BLEServer();

Methods

Initiate()

It sets necessary things to BLE Server before it initialize.

bleServerInstance.Initiate();

StartServer(serviceName)

• serviceName:
  • Type: String

This method will start the Bluetooth SPP server.

bleServerInstance.StartServer(serviceName);

StopServer()

This method will stop the Bluetooth SPP server.

bleServerInstance.StopServer();

OnData(dataCallback)

• dataCallback:
  • Type: Function

It will call the data callback when new data received from client.

bleServerInstance.OnData((data)=>{
    console.log("Data>",data);
});

SendData(data)

• data:
  • Type: String

It will send data to client.

bleServerInstance.SendData("Hello!");

OnClientConnected(callback) (optional)

• callback:
  • Type: Function

This method will be triggered when connection made to Bluetooth Client.

    bleServerInstance.OnClientConnected(()=>{
        console.log("Connected!");
    });

OnClientDisconnected(callback) (optional)

• callback:
  • Type: Function

This method will be triggered when connection lost with Bluetooth Client.

    bleServerInstance.OnClientDisconnected(()=>{
        console.log("Disconnected!");
    });

Full Example

Please find full example of implementation

// Please refer  "./test/server.js"

TODO

• [x] Bluetooth SPP Client (Windows)
• [ ] Bluetooth SPP Client (Other platform)
• [x] Bluetooth SPP Server (Windows)
• [ ] Bluetooth SPP Server (Other platform)
• [ ] Modify all code more efficient

Contribution

I created this package for my own usage. I welcome contribution for this package improvement.