ios - connecting Central to peipheral for change the colour of lights or on/off light -


i want use ble device ios has on/off lights & coloured lights. connecting bluetooth using core bluetooth framework.

now want on/off or change colour of lights. how central app peripheral bluetooth device, methods required function ?

1) scan nil service id (if using in background need service id)

2) scan

    [self.centralmanager scanforperipheralswithservices:nil                                                  options:nil];

3) devices in delegate method

    - (void)   centralmanager:(cbcentralmanager *)central         diddiscoverperipheral:(cbperipheral *)peripheral             advertisementdata:(nsdictionary *)advertisementdata                          rssi:(nsnumber *)rssi { // check advertisementdata service uuid         [self.centralmanager connectperipheral:peripheral options:nil]; }

4) on successful connection

- (void)  centralmanager:(cbcentralmanager *)central     didconnectperipheral:(cbperipheral *)peripheral {      [peripheral discoverservices:nil]; }

5) on services discoverd

- (void)peripheral:(cbperipheral *)peripheral diddiscoverservices:(nserror *)error {     if (error) {         nslog(@"error discovering services: %@", [error localizeddescription]);         return;     }      // discover characteristic want...      // loop through newly filled peripheral.services array, in case there's more one.     (cbservice *service in peripheral.services) {         [peripheral discovercharacteristics:nil forservice:service];     } }

6) on retrieving charactesicts

- (void)peripheral:(cbperipheral *)peripheral diddiscovercharacteristicsforservice:(cbservice *)service error:(nserror *)error {     // deal errors (if any)     if (error) {         nslog(@"error discovering characteristics: %@", [error localizeddescription]);         return;     }       // again, loop through array, in case.     (cbcharacteristic *characteristic in service.characteristics) {         // , check if it's right 1         if ([characteristic.uuid isequal:[cbuuid uuidwithstring:@"fff1"]]) {             scannedcharacteristic = characteristic;             nsstring *str = writevalue.length == 0 ? @"z" : writevalue;             ddlogverbose(@"writing value %@", str);             nsdata *expecteddata = [str datausingencoding:nsutf8stringencoding];             [peripheral writevalue:expecteddata forcharacteristic:characteristic type:cbcharacteristicwritewithresponse];         }         //        [peripheral setnotifyvalue:yes forcharacteristic:characteristic];     } }

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