微信小程序蓝牙模块开发
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参考技术A //index.js//获取应用实例
const app = getApp()
const util = require('../../utils/util.js')
const bletool = require('../../utils/bletool.js')
Page(
data:
// lists: [ 'order_no': '1111', 'car_no': '321', 'car_type': '尚好捷', 'order_date': '2018-01-02 08:00', 'order_money': '16.00', 'order_time': '4' ],
car_no: '',
order_no: '',
lists: [],
bleList: [], //蓝牙设备数组
serviceId: '',//592B3370-3900-9A71-4535-35D4212D2837
serviceMac: '',//C9:9B:4C:E7:DE:10
service_psd: '',//855525B837253705595800000329
service_uuid: '',
deviceId:'',
characteristics:[] //特征值
,
onLoad: function (options)
this.initBle();
,
onReady: function ()
// 页面渲染完成
,
onShow: function ()
if (app.globalData.car_no.length>0)
this.getDeviceInfo();
,
onHide: function ()
// 页面隐藏
,
onUnload: function ()
// 页面关闭
app.globalData.car_no=''
,
//蓝牙相关
//初始化蓝牙
initBle: function ()
var that = this;
wx.onBluetoothAdapterStateChange(function (res)
console.log('adapterState changed, now is', res)
app.globalData.ble_state = res.available;
if (res.available)
that.initBle();
else
util.showToast('手机蓝牙已关闭');
app.globalData.ble_isonnectting = false;
)
//打开蓝牙适配器
wx.openBluetoothAdapter(
success: function (res)
console.log('打开蓝牙适配器成功');
that.getBluetoothAdapterState();
app.globalData.ble_state = true;
that.onBluetoothDeviceFound();
,
fail: function (res)
// fail
console.log(res)
util.showToast('请打开手机蓝牙');
,
complete: function (res)
// complete
)
,
onBluetoothDeviceFound:function()
var that = this;
//监听扫描
wx.onBluetoothDeviceFound(function (res)
// res电脑模拟器返回的为数组；手机返回的为蓝牙设备对象
console.log('监听搜索新设备：', res);
that.updateBleList([res])
)
,
getBluetoothAdapterState: function ()
var that = this;
wx.getBluetoothAdapterState(
success: function (res)
var available = res.available;
var discovering = res.discovering;
if (!available)
util.showToast('蓝牙不可用');
else
if (!discovering)
// that.startBluetoothDevicesDiscovery();
)
,
startBluetoothDevicesDiscovery: function ()
var that = this;
var services = [];
services.push(this.data.serviceId);
wx.showLoading(
title: '设备搜索中'
);
setTimeout(function ()
wx.hideLoading();
if (app.globalData.deviceId.length==0)
util.showModal('设备搜索失败，请重试');
, 10000)
if(bletool.isIOS())
wx.startBluetoothDevicesDiscovery(
services: services,
allowDuplicatesKey: true,
success: function (res)
console.log('ios搜索成功');
console.log(res);
,
fail: function (err)
console.log(err);
);
else
wx.startBluetoothDevicesDiscovery(
// services: services,
allowDuplicatesKey: true,
success: function (res)
console.log('Android搜索成功');
console.log(res);
,
fail: function (err)
console.log(err);
wx.hideLoading();
that.startBluetoothDevicesDiscovery();
// that.getBluetoothAdapterState();
util.showToast('搜索失败');
);
,
startConnectDevices: function (ltype, array)
var that = this;
clearTimeout(that.getConnectedTimer);
that.getConnectedTimer = null;
wx.stopBluetoothDevicesDiscovery(
success: function (res)
// success
)
app.globalData.ble_isonnectting = true;
console.log('连接前：'+that.deviceId);
wx.createBLEConnection(
deviceId: that.deviceId,
success: function (res)
if (res.errCode == 0)
console.log('连接成功：');
that.getService(that.deviceId);
,
fail: function (err)
console.log('连接失败：', err);
wx.hideLoading();
util.showModal('设备连接失败，请重试');
// if (ltype == 'loop')
// that.connectDeviceIndex += 1;
// that.loopConnect(array);
// else
// that.startBluetoothDevicesDiscovery();
// that.getConnectedBluetoothDevices();
//
app.globalData.ble_isonnectting = false;
,
complete: function ()
);
,
getService: function (deviceId)
var that = this;
// 监听蓝牙连接
wx.onBLEConnectionStateChange(function (res)
console.log(res);
app.globalData.ble_isonnectting = res.connected
if (!res.connected)
util.showToast('连接断开');
);
// 获取蓝牙设备service值
wx.getBLEDeviceServices(
deviceId: deviceId,
success: function (res)
console.log('获取蓝牙设备service值');
console.log(res);
that.getCharacter(deviceId, res.services);
)
,
getCharacter: function (deviceId, services)
var that = this;
services.forEach(function (value, index, array)
if (value.isPrimary)
that.setData(
service_uuid: value.uuid,
deviceId: deviceId
)
app.globalData.service_uuid= value.uuid;
app.globalData.deviceId=deviceId;
);
//监听通知
wx.onBLECharacteristicValueChange(function (res)
// callback
console.log('value change', res)
const hex = bletool.buf2char(res.value)
console.log('返回的数据：', hex)
//配对密码
if (hex.indexOf('855800000106') != -1)
wx.hideLoading();
var charact_write = that.data.characteristics[1]
bletool.writeDataToDevice(that.data.deviceId, that.data.service_uuid, charact_write, that.data.service_psd);
wx.showToast(
title: '设备已连接',
icon: 'success',
duration: 3000
)
setTimeout(function ()
bletool.writeDataToDevice(that.data.deviceId, that.data.service_uuid, charact_write, '235525B837253705590400000273');
, 2000)
else if (hex.indexOf('23040000') != -1)
//启动成功
that.starRenting();
)
wx.getBLEDeviceCharacteristics(
deviceId: deviceId,
serviceId: that.getServiceUUID(),
success: function (res)
wx.getBLEDeviceCharacteristics(
deviceId: deviceId,
serviceId: that.getServiceUUID(),
success: function (res)
console.log('特征', res)
that.setData(
characteristics:res.characteristics
)
app.globalData.characteristics = res.characteristics;
var charact_read = res.characteristics[0]
,
loopConnect: function (devicesId)
var that = this;
var listLen = devicesId.length;
if (devicesId[this.connectDeviceIndex])
this.deviceId = devicesId[this.connectDeviceIndex];
this.startConnectDevices('loop', devicesId);
else
console.log('已配对的设备小程序蓝牙连接失败');
that.startBluetoothDevicesDiscovery();
that.getConnectedBluetoothDevices();
,
//更新数据 devices为数组类型
updateBleList: function (devices)
console.log('设备数据：',devices);
var newData = this.data.bleList
var that = this
var tempDevice = null;
for (var i = 0; i < devices.length; i++)
//ios设备
if (devices[i].devices != null)
if (devices[i].devices.length > 0)
tempDevice = devices[i].devices[0];
else
continue
//安卓
else
tempDevice = devices[i];
if (!this.isExist(tempDevice))
newData.push(tempDevice)
console.log('数据：');
console.log(newData)
this.setData(
bleList: newData
)
if (!app.globalData.ble_isonnectting)
var that = this;
this.data.bleList.forEach(function (value, index, array)
//找到对应id的设备，ios判断服务id安卓判断mac地址
var deviceId = value['deviceId'];
if(bletool.isIOS())
let advertisServiceUUID = value['advertisServiceUUIDs'][0];
if (advertisServiceUUID == that.data.serviceId.toUpperCase())
that.deviceId = deviceId;
console.log(that.deviceId);
that.startConnectDevices();
else
if (deviceId == that.data.serviceMac)
that.deviceId = deviceId;
console.log(that.deviceId);
that.startConnectDevices();
);
,
//是否已存在 存在返回true 否则false
isExist: function (device)
var tempData = this.data.bleList
for (var i = 0; i < tempData.length; i++)
if (tempData[i].deviceId == device.deviceId)
return true
return false
,
//服务uuid
getServiceUUID: function ()
return bletool.stringTransition(this.data.service_uuid);
,
getDeviceInfo: function ()
let car_no = app.globalData.car_no;
var that = this;
wx.request(
url: app.globalData.serverURL + '?c=car&a=getDeviceInfo&open_id=' + app.globalData.open_id + '&car_no=' + car_no,
method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
header: 'content-type': 'application/json' , // 设置请求的 header
success: function (res)
// success
var data = res.data;
console.log(data);
if (data.result == 1)
app.globalData.serviceId = data.data.service_id;
app.globalData.serviceMac = data.data.service_mac,
app.globalData.service_psd = '85' + data.data.service_psd + '5800000329';
that.setData(
serviceId: data.data.service_id,
serviceMac: data.data.service_mac,
service_psd: '85' + data.data.service_psd+'5800000329',
)
app.startBluetoothDevicesDiscovery();
// that.onBLECharacteristicValueChange();
else
util.showModal(data.msg);
,
fail: function ()
,
complete: function ()
// complete
);
,
)
微信小程序通过低功率蓝牙控制单片机上硬件设备
1.软件部分介绍
微信小程序是一种新的应用，用户不需要下载应用只用通过扫二维码或者打开链接就能使用，使用完后不需要卸载，直接关闭就行了。微信在2017年初推出微信小程序开发环境。任何企业，媒体，个人都可以注册开发。是一种全新的 开发模式。微信也因此受到许多程序员的一致好评，尤其是微信小程序的云开发，提供大量数据处理接口，让初学者也可以很快入手。不需要后端数据库的支持，自己一个人就可以开发前端和后台。
微信小程序为蓝牙模块提供了18个API。其中低功率蓝牙9个，传统蓝牙9个。本次设计使用了其中的9个接口：
(1) openBluetoothAdapter，这个API用来初始化蓝牙适配器；
(2) startBluetoothDevicesDiscovery，开始搜索蓝牙设备；
(3) onBluetoothDeviceFound，判断搜索到的蓝牙设备的信号强度；
(4) createBLEConnection，连接搜索到的蓝牙设备；
(5) stopBluetoothDevicesDiscovery，关闭搜索蓝牙设备；
(6) getBLEDeviceServices，获取蓝牙的deviceId；
(7) getBLEDeviceCharacteristics，获取蓝牙设备服务的所有特征值；
(8) notycharacteristicsId，启用低功耗蓝牙特征值的notify功能；
(9) writeBLECharacteristicValue，通过微信小程序向蓝牙模块发送命令。
js源代码
Page({ /** * 页面的初始数据 */ data: { connect: false, send_hex: false, send_string: true, send_string_val: ‘Hex‘, recv_string: true, recv_string_val: ‘Hex‘, recv_value: ‘‘, send_number: 0, recv_number: 0, recv_hex: true, wendu: 30, yanwu: 60 }, /*** 生命周期函数--监听页面加载 */ onLoad: function (options) { wx.stopBluetoothDevicesDiscovery({ success: function (res) { console.log(‘停止搜索设备‘, res) } }) console.log(options); this.setData({ deviceId: options.id, deviceName: options.name }); console.log(‘设备的ID‘, this.data.deviceId); }, /*** 生命周期函数--监听页面显示 */ onShow: function () { wx.stopBluetoothDevicesDiscovery({ success: function (res) { console.log(‘停止搜索设备‘, res) } }) var that = this; /* 连接中动画 */ wx.showLoading({ title: ‘连接中...‘, }); /* 开始连接蓝牙设备 */ wx.createBLEConnection({ deviceId: that.data.deviceId, success: function (res) { console.log(‘连接成功‘, res); wx.hideLoading(); /* 获取设备的服务UUID */ wx.getBLEDeviceServices({ deviceId: that.data.deviceId, success: function (service) { that.setData({ serviceId: "0000FFE0-0000-1000-8000-00805F9B34FB" //确定需要的服务UUID }); console.log(‘需要的服务UUID‘, that.data.serviceId) that.Characteristics(); //调用获取特征值函数 }, }); that.setData({ connect: true }) }, }) }, Characteristics: function () { var that = this; var device_characteristics = []; var characteristics_uuid = {}; wx.getBLEDeviceCharacteristics({ deviceId: that.data.deviceId, serviceId: that.data.serviceId, success: function (res) { var characteristics = res.characteristics; //获取到所有特征值 var characteristics_length = characteristics.length; //获取到特征值数组的长度 console.log(‘获取到特征值‘, characteristics); console.log(‘获取到特征值数组长度‘, characteristics_length); that.setData({ notycharacteristicsId: "0000FFE1-0000-1000-8000-00805F9B34FB", //需确定要的使能UUID characteristicsId: "0000FFE1-0000-1000-8000-00805F9B34FB" //暂时确定的写入UUID }); console.log(‘使能characteristicsId‘, that.data.notycharacteristicsId); console.log(‘写入characteristicsId‘, that.data.characteristicsId); that.notycharacteristicsId(); //使能事件 }, }) }, /* 使能函数 */ notycharacteristicsId: function () { var that = this; var recv_value_ascii = ""; var string_value = ""; var recve_value = ""; wx.notifyBLECharacteristicValueChange({ deviceId: that.data.deviceId, serviceId: that.data.serviceId, characteristicId: that.data.notycharacteristicsId, state: true, success: function (res) { console.log(‘使能成功‘, res); /* 设备返回值 */ wx.onBLECharacteristicValueChange(function (res) { var length_hex = []; var turn_back = ""; var result = res.value; var hex = that.buf2hex(result); console.log(‘返回的值‘, hex); if (that.data.recv_string == true) { /* 成功接收到的值的展示 */ that.setData({ recv_value: that.data.recv_value + hex }); /* 接收成功的值的字节 */ var recv_number_1 = that.data.recv_number + hex.length / 2; var recv_number = Math.round(recv_number_1); that.setData({ recv_number: recv_number }); } else { console.log(‘设备返回来的值‘, hex); var f_hex = hex; var length_soy = f_hex.length / 2; var length = Math.round(length_soy); for (var i = 0; i < length; i++) { var hex_spalit = f_hex.slice(0, 2); length_hex.push(hex_spalit); f_hex = f_hex.substring(2); } console.log(‘length_hex‘, length_hex); for (var j = 0; j < length_hex.length; j++) { var integar = length_hex[j]; //十六进制 recve_value = parseInt(integar, 16); //十进制 console.log(‘recve_value‘, recve_value); turn_back = turn_back + String.fromCharCode(recve_value); console.log(‘turn_back‘, turn_back); } console.log(‘最终转回来的值‘, turn_back) var recv_number_1 = that.data.recv_number + turn_back.length; var recv_number = Math.round(recv_number_1); that.setData({ recv_number: recv_number, recv_value: that.data.recv_value + turn_back }) } }); }, fail: function (res) { console.log(‘使能失败‘, res); } }) }, /* 断开连接 */ DisConnectTap: function () { var that = this; wx.closeBLEConnection({ deviceId: that.data.deviceId, success: function (res) { console.log(‘断开设备连接‘, res); wx.reLaunch({ url: ‘../index/index‘, }) } }); }, /*** 生命周期函数--监听页面卸载 */ onUnload: function () { var that = this; wx.closeBLEConnection({ deviceId: that.data.deviceId, success: function (res) { console.log(‘断开设备连接‘, res); } }); }, /* 清除Recv Bytes */ CleanNumberRecv: function () { this.setData({ recv_number: 0 }) }, /* ArrayBuffer类型数据转为16进制字符串 */ buf2hex: function (buffer) { // buffer is an ArrayBuffer var hexArr = Array.prototype.map.call( new Uint8Array(buffer), function (bit) { return (‘00‘ + bit.toString(16)).slice(-2) } ) return hexArr.join(‘‘); }, switch1Change: function (e) { var that = this; let buffer = new ArrayBuffer(1) let dataView = new DataView(buffer) if (e.detail.value) { dataView.setUint8(0, 0) } else { dataView.setUint8(0, 1) } wx.writeBLECharacteristicValue({ deviceId: that.data.deviceId, serviceId: that.data.serviceId, characteristicId: that.data.characteristicsId, value: buffer, success: function (res) { console.log(‘数据发送成功‘, res); console.log(buffer); }, fail: function (res) { console.log(‘调用失败‘, res); /* 调用失败时，再次调用 */ wx.writeBLECharacteristicValue({ deviceId: that.data.deviceId, serviceId: that.data.serviceId, characteristicId: that.data.characteristicsId, value: buffer, success: function (res) { console.log(‘第2次数据发送成功‘, res); } }) } }) }, switch1Change1: function (e) { var that = this; let buffer = new ArrayBuffer(1) let dataView = new DataView(buffer) if (e.detail.value) { dataView.setUint8(0, 2) } else { dataView.setUint8(0, 3) } wx.writeBLECharacteristicValue({ deviceId: that.data.deviceId, serviceId: that.data.serviceId, characteristicId: that.data.characteristicsId, value: buffer, success: function (res) { console.log(‘数据发送成功‘, res); console.log(buffer); }, fail: function (res) { console.log(‘调用失败‘, res); /* 调用失败时，再次调用 */ wx.writeBLECharacteristicValue({ deviceId: that.data.deviceId, serviceId: that.data.serviceId, characteristicId: that.data.characteristicsId, value: buffer, success: function (res) { console.log(‘第2次数据发送成功‘, res); } }) } }) }, add: function (e) { var id = e.target.id; if (this.data[id] > 98) { wx.showToast({ title: ‘已超过最大数值‘, icon: ‘loading‘, duration: 2000 }) return; } this.setData({ [id]: +this.data[id] + 1 }); this.numbers(id) }, lessen: function (e) { var id = e.target.id; if (this.data[id] < 1) { wx.showToast({ title: ‘已小于最小数值‘, icon: ‘loading‘, duration: 2000 }) return; } this.setData({ [id]: +this.data[id] - 1 }); this.numbers(id) }, changeVal: function (e) { var id = e.target.id; if (e.detail.value < 1 || e.detail.value > 100) { wx.showToast({ title: ‘请输入有效数值‘, icon: ‘loading‘, duration: 2000 }) return; } this.setData({ [id]: e.detail.value }); this.numbers(id) }, numbers: function (id) { var that = this; var number = ‘9‘; let buffer = new ArrayBuffer(1) let dataView = new DataView(buffer) console.log(id) if (id == ‘wendu‘) { number = ‘8‘ + that.data[id]; dataView.setUint8(0, 8) } else { number = number + that.data[id]; dataView.setUint8(0, number) } wx.writeBLECharacteristicValue({ deviceId: that.data.deviceId, serviceId: that.data.serviceId, characteristicId: that.data.characteristicsId, value: buffer, success: function (res) { console.log(‘数据发送成功‘, res); console.log(buffer); } }) } })
wxss源代码
.connect_box { width: 100%; height: 30px; line-height: 30px; font-size: 32rpx; color: #666; font-family: "Microsoft YaHei"; } .connect_device_name{ float: left; padding-left: 10px; color: #39beff; } .connect_state { float: right; padding-right: 10px; text-decoration: underline; color: #39beff; } .fan{ width: 2rem; height: 2rem; vertical-align: middle; margin-left: 2.25rem; margin-right: 0.25rem; } .water{ width: 2.5rem; height: 2rem; vertical-align: middle; margin-left: 2rem; } .name{ display: inline-block; width: 22%; margin-left: 1.5rem; font-size: 0.9rem; } .key{ float: right; margin-right: 2rem; margin-top: 0.2rem; } .detail_box{ padding: 1.5rem 0; border-bottom: 1px solid #ccc; } .num { display: inline-block; width: 45%; text-align: right; vertical-align: middle; } .num input { display: inline-block; width: 2rem; text-align: center; border: 1px solid #f2f2f2; border-left: none; border-right: none; color: #a2a2a2; } .num text { display: inline-block; width: 1.4rem; height: 1.4rem; line-height: 1.4rem; text-align: center; border: 1px solid #f2f2f2; vertical-align: top; color: #dcdcdc; } .wendu{ width:1.9rem; height:2rem; vertical-align:middle; margin-left:2.3rem; margin-right:.3rem; }
wxml源代码
<view class="connect_box"> <text class=‘connect_device_name‘>{{deviceName}}</text> <text wx:if="{{connect}}" class="connect_state" catchtap="DisConnectTap">已连接</text> <text wx:else class="connect_state">未连接</text> </view> <view > <view class="detail_box"> <image src=‘../../images/airFan.png‘ class="fan"></image> <view class=‘name‘>风扇</view> <switch bindchange="switch1Change" class=‘key‘ /> </view> <view class="detail_box"> <image src=‘../../images/waterPump.png‘ class="water"></image> <view class=‘name‘>水泵</view> <switch bindchange="switch1Change1" class=‘key‘ /> </view> <view class="detail_box"> <image src=‘../../images/temperature.png‘ class="wendu"></image> <view class=‘name‘>温度阀值</view> <view class=‘num‘> <text style=‘border-radius: 3px 0 0 3px;‘ id=‘wendu‘ bindtap=‘lessen‘>-</text> <input type=‘number‘ value=‘{{wendu}}‘ name=‘piece‘ id=‘wendu‘ bindblur="changeVal" /> <text style=‘border-radius: 0 3px 3px 0;‘ id=‘wendu‘ bindtap=‘add‘>+</text> </view> </view> <view class="detail_box"> <image src=‘../../images/smog.png‘ class="water"></image> <view class=‘name‘>烟雾阀值</view> <view class=‘num‘> <text style=‘border-radius: 3px 0 0 3px;‘ id=‘yanwu‘ bindtap=‘lessen‘>-</text> <input type=‘number‘ value=‘{{yanwu}}‘ name=‘piece‘ id=‘yanwu‘ bindblur="changeVal" /> <text style=‘border-radius: 0 3px 3px 0;‘ id=‘yanwu‘ bindtap=‘add‘>+</text> </view> </view> </view>
微信小程序展示页面
微信小程序不能在电脑上模拟，智能用手机操作，我们需要用手机打开我们的微信小程序。首先如果手机蓝牙没有打开回提醒打开蓝牙重新加载。如果手机蓝牙打开了就会去搜索附近的蓝牙模块，搜索到自己的低功率蓝牙，点击就可以连接到自己的蓝牙。我们就到了控制页面。
我们可以通过微信小程序风扇和水泵。点击开关时会调用writeBLECharacteristicValue接口通过蓝牙模块给单片机发送指令，控制单片机上的风扇和水泵等硬件设备。
2.硬件设备介绍
硬件部分主要介绍单片机、低功率蓝牙、风扇和水泵。单片机用什么型号的都行，都能与蓝牙模块正常通信，收发数据。低功率蓝牙主要优点是功率低，寿命长，价格便宜。多用于硬件连接上位机软件。风扇和水泵是外接设备，由单片机控制。
1.单片机
单片机的型号是stc89c52rc,STC89C52RC是STC公司生产的一种低功耗、高性能CMOS8位微控制器，具有8K字节系统可编程Flash存储器。STC89C52使用经典的MCS-51内核，但是做了很多的改进使得芯片具有传统的方法51单片机不具备的功能。在单芯片上，拥有灵巧的8 位CPU 和在系统可编程Flash，使得STC89C52为众多嵌入式控制应用系统提供高灵活、超有效的解决方案。
2.蓝牙模块
我用的是蓝牙型号是HC-06,给HC-06上电之后，HC-06的指示灯会不停地闪烁，这个时候就标志着进入AT模式了，配置的时候，HC-06的Rx和Tx 接到 51单片机的 Rx和 Tx，一般是P3.0,和P3.1，正常工作时，HC-06的Rx和Tx 接到 51单片机的 Tx和 Rx，8位数据位，1位结束位，无奇偶校验。一般HC-06模块的默认名称就是hc-06，默认配对密码是1234或0000。我们如果连接微信小程序，我们要把密码取消，这样微信小程序才能直接来连接。
3.风扇和水泵
风扇和水泵是直接供电就可以使用，我们只需要一个继电器就可以控制这两个设备，我选择了P3.5,P3.4这两个引脚来控制，高电平驱动，低电平关闭,这两个外接设备主要是测试数据有没有接受成功。
单片机程序主程序
void ctrl(unsigned char a) //单字节数据接收 { //注意：若单片机TXD（P3.1）无上拉能力，必须在P3.1端接上拉电阻。本次测试需要接上拉电阻 TI=0; SBUF=a; while(TI==0); TI=0; Mode=1; if(SBUF==0){ LED_yanwu=0; baojing=0; fs=0; led1=0; led2=0; }else if(SBUF==1){ LED_yanwu=1; baojing=1; fs=1; Mode=0; }else if(SBUF==2){ baojing=0; LED_wendu=0; fs1=0; }else if(SBUF==3){ baojing=1; LED_wendu=1; fs1=1; led1=0; led2=0; Mode=0; } } void main() { check_wendu(); check_wendu(); Init1602(); ES=0; //关中断 SCON = 0x50; // REN=1允许串行接受状态，串口工作模式1, //10位UART（1位起始位，8位数据位，1位停止位，无奇偶校验），波特率可变 TMOD = 0x20; // 定时器1工作于方式2，8位自动重载模式, 用于产生波特率 TH1=TL1=0xFD; // 波特率9600 （本次测试采用晶振为11.0592） PCON &= 0x7f; // 波特率不倍增 TR1 = 1; //定时器1开始工作，产生波特率 TI=0; //接收标志位置0 RI=0; ES=1; while(1) { temp=ADC0809(); check_wendu(); Key(); if(RI==1) // 是否有数据到来 { RI = 0; ctrl(SBUF); } Display_1602(yushe_wendu,yushe_yanwu,c,temp); //c温度值，temp烟雾值 if(Mode==0) { if(temp>=yushe_yanwu) { LED_yanwu=0; baojing=0; fs=0; } else { LED_yanwu=1; } if(c>800){ c = 0; } if(c>=(yushe_wendu*10)) { baojing=0; LED_wendu=0; fs1=0; } else { LED_wendu=1; } if((temp<yushe_yanwu)&&(c<(yushe_wendu*10))) { baojing=1; fs=1; fs1=1; } } } }
硬件实物图
数据采集显示正常，微信小程序可以正常控制单片机的水泵和风扇，通信正常无异常。硬件部分我就简单的拿出来说了一下，所涉及到的知识肯定比我展示到的多，软件部分主要是对低功率蓝牙的搜索，连接，发送数据比较麻烦。
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