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GJLightBlueToothis a lightweight bluetooth library.
You can try to use GJLightBlueTooth in Demo.
The architecture of project is: user ——> GJLightBlueTooth ——> CoreBlueTooth ——> GJLightBlueTooth ——> user.
There:
In Demo, you can see the class MyBLETool, this aim to seperate page and service, you can call it Device-Class. So we needn't to set callback block in ViewControllers.
You should init GJLightBlueTooth after create ViewController, self.BLE = [[GJLightBlueTooth alloc] init].
After get Characteristic, you'd better mate CBCharacteristic in device with Characteristic you get, then save it in local for writing and reading.
[self.BLE setBlockWhenDiscoverCharacteristics:^(CBPeripheral *peripheral, CBService *service, NSError *error) {
strongify(self);
for (CBCharacteristic *cha in service.characteristics){
if ([cha.UUID.UUIDString isEqualToString:CharacteristicUUIDWrite]){
self.writeCharacter = cha;
}
}
//[[NSNotificationCenter defaultCenter] postNotificationName:@"DiscoverCharacteristics" object:service];
}];
[self.BLE scan]
[self.BLE stopScan]
[self.BLE connectWithPeripheral:peri]
[self.BLE cancelConnectWithPeripheral:peri]
[self.BLE readRSSIWithPeriperal:peri]
[self.BLE sendDataToPeriperal:peri WriteCharacteristic:self.writeCharacter Command:command NSEncoding:encoding]
[self.BLE addReconnectPeriphearal:peri];
[self.BLE deleteReconnectPeriphearal:peri];
If you like to keep a heartbeat with device, there is a new thread. you can set max concurrent operation count by yourself.
NSData *cmdData = [[NSString stringWithFormat:@"%@",command] dataUsingEncoding:encoding];
NSOperation *opration = [NSBlockOperation blockOperationWithBlock:^{
[peripheral writeValue:cmdData
forCharacteristic:writeCharacteristics
type:CBCharacteristicWriteWithoutResponse];
/*
* you can set thread time interval.but the order while delay when there are a lot of orders.
*/
//[NSThread sleepForTimeInterval:SleepTimeGap];
}];
[self.writeQueue addOperation:opration];
You can also set time interval between orders, but the orders will delay if you update heartbeat quickly.
peripheral.RSSI. Instead, you should get callback after using [peripheral readRSSI], so we can't show RSSI when discover a lot of deivces. So I created a category CBPeripheral+RSSI, then added a property named rssi by using Runtime.char nameKey;
- (void)setRssi:(NSNumber *)rssi{
objc_setAssociatedObject(self, &nameKey, rssi, OBJC_ASSOCIATION_COPY_NONATOMIC);
}
- (NSNumber *)rssi{
return objc_getAssociatedObject(self, &nameKey);
}
weakify(self);
[self.BLE setBlockWhenDiscoverCharacteristics:^(CBPeripheral *peripheral, CBService *service, NSError *error) {
strongify(self);
for (CBCharacteristic *cha in service.characteristics){
if ([cha.UUID.UUIDString isEqualToString:CharacteristicUUIDWrite]){
self.writeCharacter = cha;
}
}
//[[NSNotificationCenter defaultCenter] postNotificationName:@"DiscoverCharacteristics" object:service];
}];
GJLightBlueTooth是一个轻量级蓝牙库。
你可以在Demo中查看如何使用GJLightBlueTooth。
整个蓝牙库的架构是：用户 ——> GJLightBlueTooth ——> CoreBlueTooth ——> GJLightBlueTooth ——> 用户。
其中：
而在Demo中，你还会看到MyBLETool这个类，这是为了将Demo项目中页面与业务分离而单独出来的一个类，可以理解为设备类。为了我们不需要在具体的页面中去设置回传的block。
在创建页面后，你应该初始化GJLightBlueTooth蓝牙工具：self.BLE = [[GJLightBlueTooth alloc] init]。
在获取到Characteristic后，你应该根据实际读写的Characteristic匹配出设备上的CBCharacteristic，保存在本地，用于后面的写与读。
[self.BLE setBlockWhenDiscoverCharacteristics:^(CBPeripheral *peripheral, CBService *service, NSError *error) {
strongify(self);
for (CBCharacteristic *cha in service.characteristics){
if ([cha.UUID.UUIDString isEqualToString:CharacteristicUUIDWrite]){
self.writeCharacter = cha;
}
}
//[[NSNotificationCenter defaultCenter] postNotificationName:@"DiscoverCharacteristics" object:service];
}];
[self.BLE scan]
[self.BLE stopScan]
[self.BLE connectWithPeripheral:peri]
[self.BLE cancelConnectWithPeripheral:peri]
[self.BLE readRSSIWithPeriperal:peri]
[self.BLE sendDataToPeriperal:peri WriteCharacteristic:self.writeCharacter Command:command NSEncoding:encoding]
[self.BLE addReconnectPeriphearal:peri];
[self.BLE deleteReconnectPeriphearal:peri];
这里针对现在很多公司提出需要手机与设备有心跳的要求，开启了一个线程队列。该队列设置能够同时存在的指令数为3。
NSData *cmdData = [[NSString stringWithFormat:@"%@",command] dataUsingEncoding:encoding];
NSOperation *opration = [NSBlockOperation blockOperationWithBlock:^{
[peripheral writeValue:cmdData
forCharacteristic:writeCharacteristics
type:CBCharacteristicWriteWithoutResponse];
/*
* you can set thread time interval.but the order while delay when there are a lot of orders.
*/
//[NSThread sleepForTimeInterval:SleepTimeGap];
}];
[self.writeQueue addOperation:opration];
你也可以设置指令间隔时间，但是这样会造成因心跳刷新过快造成的延迟发送。
peripheral.RSSI来获取设备的信号量，必须在用[peripheral readRSSI]后，使用回调来获取。这就会造成在扫描到设备时候无法显示信号量。所以专门创建了一个分类CBPeripheral+RSSI，利用Runtime来动态给peripheral创建了一个rssi属性。char nameKey;
- (void)setRssi:(NSNumber *)rssi{
objc_setAssociatedObject(self, &nameKey, rssi, OBJC_ASSOCIATION_COPY_NONATOMIC);
}
- (NSNumber *)rssi{
return objc_getAssociatedObject(self, &nameKey);
}
weakify(self);
[self.BLE setBlockWhenDiscoverCharacteristics:^(CBPeripheral *peripheral, CBService *service, NSError *error) {
strongify(self);
for (CBCharacteristic *cha in service.characteristics){
if ([cha.UUID.UUIDString isEqualToString:CharacteristicUUIDWrite]){
self.writeCharacter = cha;
}
}
//[[NSNotificationCenter defaultCenter] postNotificationName:@"DiscoverCharacteristics" object:service];
}];
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