获得蓝牙小米温湿度传感器的例子-Arduino中文社区

Zoologist 发表于 2021-7-25 19:05

获得蓝牙小米温湿度传感器的例子

代码来自 https://www.instructables.com/ESP32-Xiaomi-Hack-Get-Data-Wirelessly/

#include "soc/soc.h"
#include "soc/rtc_cntl_reg.h"
#include "esp_system.h"
#include <sstream>

#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEScan.h>
#include <BLEAdvertisedDevice.h>

#define SCAN_TIME10 // seconds

boolean METRIC = true; //Set true for metric system; false for imperial

BLEScan *pBLEScan;

void IRAM_ATTR resetModule(){
ets_printf("reboot\n");
esp_restart();
}

floatcurrent_humidity = -100;
floatprevious_humidity = -100;
float current_temperature = -100;
float previous_temperature = -100;

class MyAdvertisedDeviceCallbacks : public BLEAdvertisedDeviceCallbacks {
void onResult(BLEAdvertisedDevice advertisedDevice)
{
   if (advertisedDevice.haveName() && advertisedDevice.haveServiceData() && !advertisedDevice.getName().compare("MJ_HT_V1")) {

         int serviceDataCount = advertisedDevice.getServiceDataCount();
         std::string strServiceData = advertisedDevice.getServiceData(0);

         uint8_t cServiceData;
         char charServiceData;

         strServiceData.copy((char *)cServiceData, strServiceData.length(), 0);

         Serial.printf("\n\nAdvertised Device: %s\n", advertisedDevice.toString().c_str());

         for (int i=0;i<strServiceData.length();i++) {
            sprintf(&charServiceData, "%02x", cServiceData);
         }

         std::stringstream ss;
         ss << "fe95" << charServiceData;

         Serial.print("Payload:");
         Serial.println(ss.str().c_str());

         char eventLog;
         unsigned long value, value2;
         char charValue = {0,};
         switch (cServiceData) {
            case 0x04:
               sprintf(charValue, "%02X%02X", cServiceData, cServiceData);
               value = strtol(charValue, 0, 16);
               if(METRIC)
               {
                  current_temperature = (float)value/10;
               }else
               {
                  current_temperature = CelciusToFahrenheit((float)value/10);
               }
               displayTemperature();
               break;
            case 0x06:
               sprintf(charValue, "%02X%02X", cServiceData, cServiceData);
               value = strtol(charValue, 0, 16);
               current_humidity = (float)value/10;
               displayHumidity();
               Serial.printf("HUMIDITY_EVENT: %s, %d\n", charValue, value);
               break;
            case 0x0A:
               sprintf(charValue, "%02X", cServiceData);
               value = strtol(charValue, 0, 16);
               Serial.printf("BATTERY_EVENT: %s, %d\n", charValue, value);
               break;
            case 0x0D:
               sprintf(charValue, "%02X%02X", cServiceData, cServiceData);
               value = strtol(charValue, 0, 16);
               if(METRIC)
               {
                  current_temperature = (float)value/10;
               }else
               {
                  current_temperature = CelciusToFahrenheit((float)value/10);
               }
               displayTemperature();
               Serial.printf("TEMPERATURE_EVENT: %s, %d\n", charValue, value);
               sprintf(charValue, "%02X%02X", cServiceData, cServiceData);
               value2 = strtol(charValue, 0, 16);
               current_humidity = (float)value2/10;
               displayHumidity();
               Serial.printf("HUMIDITY_EVENT: %s, %d\n", charValue, value2);
               break;
         }
   }
}
};

void setup() {

Serial.begin(115200);
Serial.println("ESP32 XIAOMI Humity");

initBluetooth();
}

void loop() {

char printLog;
Serial.printf("Start BLE scan for %d seconds...\n", SCAN_TIME);
BLEScan* pBLEScan = BLEDevice::getScan(); //create new scan
pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
pBLEScan->setActiveScan(true); //active scan uses more power, but get results faster
BLEScanResults foundDevices = pBLEScan->start(SCAN_TIME);
int count = foundDevices.getCount();
printf("Found device count : %d\n", count);

delay(100);
}

void initBluetooth()
{
BLEDevice::init("");
pBLEScan = BLEDevice::getScan(); //create new scan
pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
pBLEScan->setActiveScan(true); //active scan uses more power, but get results faster
pBLEScan->setInterval(0x50);
pBLEScan->setWindow(0x30);
}

void displayTemperature()
{
if(current_temperature != previous_temperature)
{

   previous_temperature = current_temperature;
}
}

void displayHumidity()
{
if(current_humidity != previous_humidity)
{
   previous_humidity = current_humidity;
}
}

String convertFloatToString(float f)
{
String s = String(f,1);
return s;
}

float CelciusToFahrenheit(float Celsius)
{
float Fahrenheit=0;
Fahrenheit = Celsius * 9/5 + 32;
return Fahrenheit;
}

我使用 DFRobot FireBeetle 测试接收

结果如下（测试有2个上面这样的传感器）

anqiw 发表于 2021-7-25 22:22

正在找，谢谢了。只限上图的温湿度计吗，米家其他的蓝牙温湿度计都支持吗？

Zoologist 发表于 2021-7-26 08:35

anqiw 发表于 2021-7-25 22:22
正在找，谢谢了。只限上图的温湿度计吗，米家其他的蓝牙温湿度计都支持吗？ ...

不知道唉

我用的是图上这一款

oanger 发表于 2021-7-28 23:20

不知道他用的什么方案

Zoologist 发表于 2021-7-29 08:47

oanger 发表于 2021-7-28 23:20
不知道他用的什么方案

https://post.smzdm.com/p/alpzodd8/
可以参考一下

oanger 发表于 2021-7-29 22:51

Zoologist 发表于 2021-7-29 08:47
https://post.smzdm.com/p/alpzodd8/
可以参考一下

谢谢，新手，没看太懂。

leonclz 发表于 2021-10-20 00:47

那个soc.h是从哪里获取的？

Zoologist 发表于 2021-10-20 08:42

leonclz 发表于 2021-10-20 00:47
那个soc.h是从哪里获取的？

编译环境自带的。

leonclz 发表于 2021-10-20 14:15

本帖最后由 leonclz 于 2021-10-20 14:52 编辑

Zoologist 发表于 2021-10-20 08:42
编译环境自带的。
也就是说，需要esp32的板子才有这个头文件？我用的d1 mini ，编译的时候提示没有这个文件

Zoologist 发表于 2021-10-20 15:48

leonclz 发表于 2021-10-20 14:15
也就是说，需要esp32的板子才有这个头文件？我用的d1 mini ，编译的时候提示没有这个文件 ...

你可以试试 DFRobot 的 FireBeetle 环境，前几天做了一个项目，里面是有的。

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获得蓝牙小米温湿度传感器的例子