要做物聯(lián)網(wǎng),首先我們要把硬件連接到WiFi,如何連接有很多種方案,比如在硬件上安裝一個(gè)熱點(diǎn),手機(jī)連接這個(gè)熱點(diǎn)把WiFi名字和密碼傳給硬件,也可以通過聲波等等......僅說一下在最近項(xiàng)目中用到的:WiFi快連技術(shù).SmartConfig其實(shí)是最早攻克這項(xiàng)技術(shù)的廠商TI的一種叫法.
原理大致是:
手機(jī)APP端發(fā)送包含WiFi用戶名WiFi密碼的UDP廣播包或者組播包,智能終端的WiFi芯片可以接收到該UDP包,只要知道UDP的組織形式,就可以通過接收到的UDP包解密出WiFi用戶名密碼,然后智能硬件配置收到的WiFi用戶名密碼到指定的WiFiAP上统刮。
首先你要有一個(gè)可以支持SmartConfig技術(shù)的硬件(可以直接在TI購買http://www.ti.com.cn/tool/cn/smartconfig);
大致是這樣:
Ti本身就有app,功能簡(jiǎn)單,就是把WiFi名字和密碼傳給硬件,讓硬件連上WiFi;
我們要做一個(gè)連接界面放到我們的app中,我找了好幾天找到了這個(gè)比較好的源碼(https://github.com/ray-x/Wifi-TI3200)
他的效果是這樣子的:
我最終做出來是這個(gè)樣子的:
打開上面的工程后看一下文件
紅色箭頭是必須導(dǎo)入的庫,藍(lán)色箭頭是主要模塊控制器的代碼,下面的是核心靜態(tài)庫
但是這個(gè)源碼有個(gè)問題,點(diǎn)擊了"Start"之后,控制臺(tái)會(huì)瘋狂打印app發(fā)送的UDP數(shù)據(jù)包大小Packet size
我目前也不知道如何取消打印,定義NSLog宏和printf宏都不好使,我覺得應(yīng)該是靜態(tài)庫中的問題.雖然不影響使用,但若有人知道如何處理恭請(qǐng)?jiān)u論賜教哇
控制器.h中什么都沒有,下面是我的部分.m中代碼:
#import "JDWifiVC.h"
#import "JDWifiView.h"
#import <SystemConfiguration/CaptiveNetwork.h>//顯示W(wǎng)iFi名稱
#import "MBProgressHUD.h"
//#import "Reachability.h"http://可連接性檢查模塊,監(jiān)測(cè)iOS設(shè)備網(wǎng)絡(luò)環(huán)境
#import "SmartConfigGlobalConfig.h"
#import "SmartConfigDiscoverMDNS.h"
#import "FirstTimeConfig.h"
@interface JDWifiVC ()
@property (nonatomic,weak)JDWifiView *wifiView;
@property (nonatomic, assign) BOOL canceled;//取消彈窗
//@property (nonatomic, strong) Reachability *wifiReachability;
@property (atomic,strong) SmartConfigGlobalConfig *globalConfig;
@property (nonatomic) SmartConfigDiscoverMDNS *mdnsService;
@property (nonatomic) FirstTimeConfig *firstTimeConfig;
@property (atomic, copy) NSString *passwordKey;
@property (nonatomic,weak) NSTimer *mdnsTimer;
@property (nonatomic,assign) BOOL discoveryInProgress;
@end
int const MDNSRestartTime = 15;
@implementation JDWifiVC
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
//設(shè)置UI
[self setupUI];
//監(jiān)測(cè)wifi狀態(tài),我覺得沒必要用Reachability,連不上用戶自己就去檢查路由器了嘛
// [self detectWifi];
self.discoveryInProgress = NO;
// Do any additional setup after loading the view, typically from a nib.
//都是庫中的方法,直接調(diào)用
self.globalConfig = [SmartConfigGlobalConfig getInstance];
// init mdns service
self.mdnsService = [SmartConfigDiscoverMDNS getInstance];
// add notification for discovered device
//自動(dòng)發(fā)現(xiàn)設(shè)備
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(deviceAdded:)
name:@"deviceFound"
object:nil];
}
-(void)dealloc
{
//停止發(fā)送udp
[self stopDiscovery];
[[NSNotificationCenter defaultCenter]removeObserver:self];
}
//跳轉(zhuǎn)設(shè)置界面
-(void)pushSetting
{
//需要在plist文件中加prefs
NSURL *url = [NSURL URLWithString:@"prefs:root=WIFI"];
if ([UIDevice currentDevice].systemVersion.floatValue <= 10.0)
{
[[UIApplication sharedApplication] openURL:url];
}else{
// iOS10 之后,只能跳轉(zhuǎn)到應(yīng)用設(shè)置界面,UIApplicationOpenSettingsURLString這個(gè)只支持iOS8之后.
NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
[[UIApplication sharedApplication] openURL:url options:@{} completionHandler:nil];
}
}
//顯示當(dāng)前連接WiFi名稱
-(void)getCurrentWifiName
{
//WiFi名字
NSString *ssid = @"Not Found";
//mac地址
NSString *macIp = @"Not Found";
CFArrayRef myArray = CNCopySupportedInterfaces();
if (myArray != nil)
{
CFDictionaryRef myDict = CNCopyCurrentNetworkInfo(CFArrayGetValueAtIndex(myArray, 0));
if (myDict != nil)
{
NSDictionary *dict = (NSDictionary*)CFBridgingRelease(myDict);
ssid = [dict valueForKey:@"SSID"];
macIp = [dict valueForKey:@"BSSID"];
}
}
[self.wifiView.wifiNameBtn setTitle:ssid forState:UIControlStateNormal];
}
//點(diǎn)擊開始連接按鈕
-(void)didClickNextBtn
{
//先檢查一下
NSString *wifiName = self.wifiView.wifiNameBtn.titleLabel.text;
NSString *wifiPassword = self.wifiView.wifiPasswordTF.text;
if (
([wifiName isEqualToString:@"wifi名字"])||
(!wifiPassword)||
wifiPassword.length == 0
)
{
[self alertWithMessage:@"請(qǐng)檢查WiFi和密碼是否正確"];
}
//開始連接
else
{
//我用的MBHUD,給一個(gè)圓環(huán)狀進(jìn)度條,還可以取消連接
MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.navigationController.view animated:YES];
// Set the determinate mode to show task progress.
hud.mode = MBProgressHUDModeDeterminate;
hud.label.text = NSLocalizedString(@"連接中...", @"HUD loading title");
// Configure the button.
[hud.button setTitle:NSLocalizedString(@"取消", @"HUD cancel button title") forState:UIControlStateNormal];
[hud.button addTarget:self action:@selector(cancelWork) forControlEvents:UIControlEventTouchUpInside];
dispatch_async(dispatch_get_global_queue(QOS_CLASS_USER_INITIATED, 0), ^{
// 更新進(jìn)度
[self doSomeWorkWithProgress];
dispatch_async(dispatch_get_main_queue(), ^{
[hud hideAnimated:YES];
[self stopDiscovery];
});
});
}
}
//圓環(huán)進(jìn)度條
- (void)doSomeWorkWithProgress
{
//開始
[self continueStartAction];
self.canceled = NO;
// This just increases the progress indicator in a loop.
float progress = 0.0f;
while (progress < 1.0f) {
if (self.canceled) break;
progress += 0.01f;
dispatch_async(dispatch_get_main_queue(), ^{
// Instead we could have also passed a reference to the HUD
// to the HUD to myProgressTask as a method parameter.
[MBProgressHUD HUDForView:self.navigationController.view].progress = progress;
});
//發(fā)送udp包秒數(shù)30秒
usleep(300000);
}
}
//取消連接
- (void)cancelWork
{
[self stopDiscovery];
self.canceled = YES;
}
//停止發(fā)送udp
-(void) stopDiscovery {
[self.mdnsTimer invalidate];
self.mdnsTimer = nil;
self.discoveryInProgress = NO;
[self.firstTimeConfig stopTransmitting];
[self mDnsDiscoverStop];
}
- (void) continueStartAction
{
self.discoveryInProgress = YES;
[self startTransmitting];
}
/*
This method start the transmitting the data to connected
AP. Nerwork validation is also done here. All exceptions from
library is handled.
這個(gè)方法開始傳輸數(shù)據(jù)連接Ap茸塞。網(wǎng)上驗(yàn)證也是在這里完成并淋。所有的異常庫處理抖剿。
*/
- (void)startTransmitting{
//假如...就...最后..語句
@try {
[self connectLibrary];
if (self.firstTimeConfig == nil)
{
return;
}
[self sendAction];
}
//出錯(cuò)的處理
@catch (NSException *exception) {
//NSLog(@"%s exception == %@",__FUNCTION__,[exception description]);
[self performSelectorOnMainThread:@selector(alertWithMessage:) withObject:[exception description] waitUntilDone:NO];
}
@finally {
}
}
// check for internet and initiate the libary object for further transmit.
//檢查網(wǎng)絡(luò)和啟動(dòng)庫進(jìn)一步傳播池户。
-(void) connectLibrary
{
NSString *wifiName = self.wifiView.wifiNameBtn.titleLabel.text;
NSString *wifiPassword = self.wifiView.wifiPasswordTF.text;
@try {
//斷開庫
[self disconnectFromLibrary];
self.passwordKey = [self.wifiView.wifiPasswordTF.text length] ? self.wifiView.wifiPasswordTF.text : nil;
NSString *ipAddress = [FirstTimeConfig getGatewayAddress];
self.firstTimeConfig = [[FirstTimeConfig alloc] initWithData:ipAddress withSSID:wifiName withKey:self.passwordKey withFreeData:nil withEncryptionKey:nil numberOfSetups:4 numberOfSyncs:10 syncLength1:3 syncLength2:23 delayInMicroSeconds:1000];
[self mDnsDiscoverStart];
// set timer to fire mDNS after 15 seconds
self.mdnsTimer = [NSTimer scheduledTimerWithTimeInterval:MDNSRestartTime target:self selector:@selector(mDnsDiscoverStart) userInfo:nil repeats:NO];
}
@catch (NSException *exception) {
//NSLog(@"%s exception == %@",__FUNCTION__,[exception description]);
[self performSelectorOnMainThread:@selector(alertWithMessage:) withObject:[exception description] waitUntilDone:NO];
}
}
/**
MDNS Discovery
*/
- (void) mDnsDiscoverStart
{
[self.mdnsService startMDNSDiscovery:nil];
}
- (void) mDnsDiscoverStop
{
[self.mdnsService stopMDNSDiscovery];
}
/*
This method begins configuration transmit
In case of a failure the method throws an OSFailureException.
這個(gè)方法開始配置傳輸對(duì)于失敗的方法拋出一個(gè)OSFailureException
*/
-(void) sendAction{
@try {
//NSLog(@"%s begin", __PRETTY_FUNCTION__);
[self.firstTimeConfig transmitSettings];
//NSLog(@"%s end", __PRETTY_FUNCTION__);
}
@catch (NSException *exception) {
//NSLog(@"exception === %@",[exception description]);
[self performSelectorOnMainThread:@selector(alertWithMessage:) withObject:[exception description] waitUntilDone:NO];
}
@finally {
}
}
//彈窗警告
-(void)alertWithMessage:(NSString *)message
{
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"哎呀,出錯(cuò)啦" message:message preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"再試一次" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
}];
[alert addAction:action1];
[self presentViewController:alert animated:YES completion:nil];
}
// disconnect libary method involves to release the existing object and assign nil.
//斷開庫方法需要釋放現(xiàn)有對(duì)象和分配nil片吊。
-(void) disconnectFromLibrary
{
self.firstTimeConfig = nil;
}
-(void)deviceAdded:(id)sender
{
if(self.discoveryInProgress == YES)
{
[self stopDiscovery];
[self alertWithMessage:@"新設(shè)備被發(fā)現(xiàn)"];
}
}
這個(gè)技術(shù)有一個(gè)問題,就是連接比較慢.我對(duì)iPhone做過一定的測(cè)試:
iPhone5S以發(fā)送udp包1分鐘為一次,10次連接成功在4次左右,官方app稍高一點(diǎn),7次左右,但并不是百分之百;
以發(fā)送udp包2分鐘為一次,10次連接成功5次左右,是可以稍微提高的;
iPhone6與iPhone5S情況差不多
iPhone6S則不論在哪種情況下10次連接成功都在1次左右,官方app就沒連接成功過(醉了...??)
iPhone7在哪種情況下都沒成功過
打電話給售后給我個(gè)郵箱,發(fā)送了郵件也不知道猴年馬月能回復(fù)...不過搜索了一下6S普遍有這個(gè)問題,不知如何解決
最后在技術(shù)論壇上找到了答案:應(yīng)該是硬件兼容性問題.
解決辦法的話,TI適配6S以上的硬件明年才會(huì)量產(chǎn),所以換個(gè)廠家的硬件吧??比如 鼎甲微聯(lián)http://www.djlink.cn/
希望能幫助到剛做這方面的同僚,節(jié)約一點(diǎn)時(shí)間;
若有知道如何解決上述問題的,評(píng)論留言不勝感激;
若有不妥之處也希望能夠在評(píng)論指正,大家一起進(jìn)步
