Open Source WiFi Weather Station

Overview Project: Open Source WIFI Weather Station System Objective: To get the temperature, humidity, illumination and even PM2.5 data around you. Difficulty: Middle Time-consuming: 5-hour Maker: Introduction : This device can acquire real-time temperature, humidity, illumination and even PM2.5 data around you, and display them on the screen. You can also connect it to the internet if needed. With a phone or a laptop, you can check the data anytime and anywhere, which can be easily achieved by Microduino. Bill of Material Microduino Equipment Module Number Function Microduino-Core+ 1 Core board Microduino-USBTTL 1 Download program Microduino-WiFi 1 Connect the internet Microduino-Temp&Hum 1 Digital temperature and humidity sensor Microduino-Air Quality 1 Air quality sensor Microduino-Light 1 Light-sensitive sensor Microduino-OLED 1 For display Other Equipment Module Number Function Micro-USB cable 1 Program download and power supply Microduino-USBTTL 1 Program download module GP2Y1010AU0F 1 PM2.5 sensor Screw 7 For fixating modules Screwdriver 1 For fixating screws Shell 1 Principle of Experiment On the special plate of the Weather Station is installed with sensors with multi-parameters, including the digital temperature and humidity sensor (Microduino-Tem&Hum), the light sensor (Microduino-Light), the air quality sensor of Microduino-Air and the PM2.5 sensor (gp2y1010au0f). Each sensor is connected with Microduino-Sensorhub, whose data can be analyzed and processed by the Microduino core module, and then displayed on the OLED. At the same time, you can connect the Microduino-Wifi and Microduino-Core together to the internet, communicating with mCotton (IOT platform) and giving feedback to users via text and graph info. You can check this data anytime and anywhere with your phones or laptops. |600px|center This system is composed of sensors, coordinator, network adapter, OLED display, mCotton, integrated with sensor technology, network communication technology, OLED display technology and IOT technology. Sensors mainly complete the data collection of the temperature, humidity, light intensity, air quality, then the coordinator can process and analyze the collected data. Meatime, you can connect it to the internet and communicate with mCotton through the network adapter, and check these data on the mCotton. |600px|center Structure of the Management Platform The platform can be divided into two parts: Microduino core control, responsible for sensors' data collection and connecting to the internet; mCotton IOT platform, responsible for displaying data to users in the way of curves so that you can check and share your surrounding weather, as follows: Main sensors |600px|center The picture below display the procedure of the system. Data Collection System: Mainly responsible for collecting ambient temperature, humidity, light intensity data and etc. The data collected from the sensors will be uploaded to the Microduino core. Wireless Transmission System: The system sends the collected data to the server through wireless network, adopting Wifi data transmission. Data Processing System: This system is responsible for storage, upload and visual display so that users can check weather on their PC or phone client. |600px|center Document Weather Station Code:【Weather Station Code】 Local Weather Station Code:【Local Weather Station Code】 Weather Station Code Github:Weather_Station Debugging Build the server. Weather Station needs to be connected into the internet, so a server for storage and display is indispensible. First of all, we need to build a network server. About mCotton Currently positioned to do an open universal networking platform, mCotton mainly providse sensor data access, storage and display services. It can offer a networking project platform for all of the open source software and hardware enthusiasts and manufacturing enterprises, enabling them to deliver IOT electronic products without the need to care about the server implementation details and operation. We only need to register an account in mCotton, it will provide you with a unique KEY API,which is used to recognize identity in the server. MCotton as an open public Internet access platform, it aims to serve all the enthusiasts and developers, so that the sensor data access, storage and display become easy and simple. Here we introduce how to use the mCotton platform to complete your easy access. Register Open the main page of mCotton: somvpn.cn:3000, click " Sign in/Join ", you'll see a pop-up showing login/register, then click "Create account" and enter the user register page. On the user register page, you can fill in the relevant information and complete. Add Devices Click "Projects" after login and enter the engineering page. Find "Weather Station" in the engineering page, click " Assemble to My Devices " and you can add your devices. Enter the name your device in "Name" and click "Submit" to publish. Get APIKEY After the publish, you can see your device on " My Garage " page. Find your Weather Station device and remember its unique ID. Program Download Stack Microduino-Core+ and Microduino-USBTTL without fixed order, and connect them to the PC via USB cable. Make sure you built Microduino IDE, otherwise, please refer to: 1-Arduino IDE installation instructions. Open Arduino IDE programming software, click【File】->【Open】 Scan the project program address, click " weatherCC3000.ino " and open it. Corresponding parameters needed to be configured in the "def.h" file: define WLAN_SSID “Wifi name you are going to connect.” define WLAN_PASS “Wifi password” define WEBSITE “Server address” define WEBSITEPORT “Server port” define APP_KIT_ID “ID number acquired from Step3步.” Click "Tool, select Microduino-Core+ as the board card, and the processor " Atmega644pa@16M,5V ", then burn the program. Install the Weather Station Step1:Fixate the OLED screen and A1 with screws. Step2:Assemble B1-B5 with B6. Step3:Assemble Core+, USBTTL, and the Hub together, use screws to fixate them on A2, then connect them on the PM 2.5 sensor with the cable. Stick the PM2.5 sensor to the base board. Step4:Assemble B7, B8 and B9 to the Temp&Hum sensor, Air senosr, Light sensor respectively as the picture shows. Step5:Connect the the Temp&Hum sensor, Air senosr, Light sensor on the Hub as the picture shows. Fixate the sensors on the slot where B1 and B2 combines as it mentioned in Step2, and after that, then connect A1 and A2 on the top and bottom of the system. Step6:Fixate the system with B0 after finishing the steps above, insert the USB cable and complete the weather station installation. At this time, you can see data of all sensors on the OLED screen. And the same time, you can also see the uploaded weather data on the pre-set mCotton device. Program Description Available in China: About Main Program //1.About Screen Display ============================= #include"Arduino.h" #include "U8glib.h" //2.About Sensor ================================ #include <Wire.h> #include "I2Cdev.h" #include <AM2321.h> #include <SoftwareSerial.h> //3.About WIFI ================================ #include <Adafruit_CC3000.h> #include <ccspi.h> #include <SPI.h> #include <string.h> #include "utility/debug.h" //4.About Sefl-define ============================= #include "def.h" #include "oled.h" #include "wifi.h" #include "sensor.h" #define INTERVAL_LCD 200 //Refresh interval for OLED and sensors #define INTERVAL_NET 30000 //Sensor data upload interval unsigned long lcd_time = millis(); //OLED and sensor update timer unsigned long net_time = millis(); //Sensor data upload update timer void setup(void) { Serial.begin(115200); //Initializing baud rate setup_wifi(); //Initializing Wifi } void loop(void) { if (lcd_time > millis()) lcd_time = millis(); if (millis() - lcd_time > INTERVAL_LCD) { SensorUpdate(); //Sensor update volcd(sensorTemp, sensorHumi, sensorLight, sensorPM25, sensorEtoh); //OLED display update lcd_time = millis(); //Timer update } if (net_time > millis()) net_time = millis(); if (millis() - net_time > INTERVAL_NET) { updateWeatherData(sensorTemp, sensorHumi, sensorLight, sensorPM25, sensorEtoh); //Upload sensor data net_time = millis(); //Timer update } } Configured by Users def.h #define WLAN_SSID "AZURE" //WIFI network name #define WLAN_PASS "azure001" //WIFI password #define WEBSITE "mcotton.microduino.cn" //Server address #define WEBSITEPORT 8080 //Server port number #define APP_KIT "TLcrn6vaAahjnvKR2" //Device ID #define APP_KIT "YourDeviceID" //Device ID #define WEBPAGE "/api/v1.0/d" #define WEBUTTONPAGE "/api/v1.0/ce" OLED display U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE); //Set OLED type //-------Font setting: large, medium, small. #define setFont_L u8g.setFont(u8g_font_7x13) #define setFont_M u8g.setFont(u8g_font_fixed_v0r) #define setFont_S u8g.setFont(u8g_font_chikitar) // Thermometer pattern const unsigned char bmp_tem[] U8G_PROGMEM = { 0xE0,0x81,0x30,0x83,0x10,0x82,0x10,0x82,0x10,0xFA,0x10,0x82, 0x10,0x82,0x10,0xFA,0x10,0x82,0xD0,0x82,0xD0,0xFA,0xD0,0x82, 0xD0,0x82,0xD0,0xFA,0xD0,0x82,0xD0,0x82,0xD0,0xFA,0xD0,0x82, 0xD0,0x82,0xD8,0x86,0xC4,0x88,0xF2,0x93,0xFB,0xB7,0xF9,0xA7, 0xFD,0xAF,0xFD,0xAF,0xF9,0xA7,0xFA,0x97,0xF2,0x93,0xC4,0x88, 0x18,0x86,0xF0,0x83 }; //Water drop pattern const unsigned char bmp_hum[] U8G_PROGMEM = { 0x00,0x00,0x01,0x00,0x00,0x01,0x00,0x80,0x03,0x08,0x80,0x03,0x18,0x80,0x07,0x1C, 0xC0,0x07,0x3C,0xC0,0x07,0x3E,0xE0,0x0F,0x3E,0xE0,0x0F,0x7A,0xF0,0x1F,0x7B,0xF8, 0x1F,0x72,0xF8,0x1F,0x3E,0xF8,0x3F,0x1C,0xFC,0x3F,0x00,0xFC,0x7F,0x00,0xFE,0x7F, 0x00,0xFE,0x7F,0x00,0xFE,0x7F,0x00,0xFF,0xFF,0x00,0xFF,0xFF,0x00,0xFF,0xFF,0x00, 0xF3,0xFF,0x00,0xF2,0x7F,0x00,0xE6,0x7F,0x00,0xC6,0x7F,0x00,0x0E,0x3F,0x00,0x3C, 0x1E,0x00,0xF8,0x1F,0x00,0xE0,0x07,0x00,0x80,0x01 }; //Display function void osd_setup(int _osd_setup,char* _osd_text) { u8g.firstPage(); do { setFont_L; u8g.setPrintPos(4, 30); u8g.print(_osd_text); u8g.drawFrame(0,48,128,14); if(_osd_setup) u8g.drawBox(0+2,48+2,map(_osd_setup,0,5,0,128-4),14-4); } while( u8g.nextPage() ); } //Display function void volcd(float temp, float humi, float light, float pm25, float etoh) { u8g.firstPage(); do { u8g.setDefaultForegroundColor(); u8g.drawXBMP( 4, 1, 15, 32, bmp_tem); u8g.drawXBMP( 70, 2, 24, 30, bmp_hum); setFont_M; //Set the font to be large u8g.setPrintPos(20, 16); //Set start coordinate of the text u8g.print("`C "); setFont_L; //Set the font to be large u8g.setPrintPos(20, 32); // Set start coordinate of the text u8g.print(temp , 1); //Temperature setFont_M; // Set the font to be large u8g.setPrintPos(100, 16); //Set start coordinate of the text u8g.print("%"); setFont_L; //Set the font to be large u8g.setPrintPos(100, 32); //Set start coordinate of the text u8g.print(humi , 0); // Temperature setFont_L; // Set the font u8g.setPrintPos(4, 49); //Set start coordinate of the text u8g.print(light , 0); //Light intensity setFont_M; // Set the font u8g.print(" Lux"); setFont_L; // Set the font u8g.setPrintPos(4, 63); // Set start coordinate of the text u8g.print(pm25 , 1); // Light intensity setFont_M; // Set the font u8g.print(" ug/m3"); setFont_L; // Set the font u8g.setPrintPos(80, 49); // Set start coordinate of the text u8g.print(etoh , 0); //Light intensity setFont_M; // Set the font u8g.print(" ppm"); setFont_M; //Set the font to be large u8g.setPrintPos(80, 63); // Set start coordinate of the text u8g.print(" LED:"); } while( u8g.nextPage() ); } void volcdsetup(char* zi,unsigned int x,unsigned int y) { //#ifdef OLED u8g.firstPage(); do { setFont_L; u8g.setPrintPos(x, y); u8g.print(zi); } while( u8g.nextPage() ); //#endif } Sensor data collection #include <SoftwareSerial.h> #include <AM2321.h> AM2321 am2321; SoftwareSerial pmSerial(4,5); // Communication soft serial port of the PM2.5 sensor float sensorTemp; //Temperature value float sensorHumi; //Humidity vale float sensorPM25; //PM2.5 density float sensorLight; //Light intensity float sensorEtoh; //Air quality //Read PM 2.5 sensor float PM25(){ int data_s = 0; //Receive data from the serial port int num = -1; //Receive data counting from the serial port int sum = 0; //Check sum int cal[5]; //Receive data cache float dustDensity = 0; //PM2.5 density pmSerial.begin(2400); //Start the soft serial port at the beginning pmSerial.flush(); //Clear the serial cache while(1) { if(pmSerial.available() > 0) //Serial cache data { data_s = pmSerial.read(); //Read the serial cache data if(data_s == 0xAA) //Get the start bit of the data frame { num = 0; //Start counting } else if(num >= 0) { num++; //Read data. Number+1 cal[num-1] = data_s; //Data saved in the cache if(num == 6) //Read the last bit of the data frame { sum = cal[0] + cal[1] + cal[2] + cal[3]; //Calculate check sum if(sum == cal[4] && cal[5] == 0xFF) //Match the check sum and the last bit of the data frame is oxFF, meaning the received data frame is normal. { dustDensity = (cal[0]*256 + cal[1])*(5.0/1024)*550; //Calculate PM2.5 density and the unit is ug/m3. } else //The received data is not normal. { dustDensity = 0; //Density clear } break; } } } } pmSerial.end(); //Close the soft serial port return dustDensity; //The returned value } //Sensor data update void SensorUpdate() { //Get the density of the PM 2.5 sensorPM25 = PM25(); //Get temperature and humidity am2321.read(); sensorTemp = am2321.temperature / 10.0; sensorHumi = am2321.humidity / 10.0; //Get light intensity sensorLight = map(analogRead(A0), 0, 1023, 0, 255); //Get air quality sensorEtoh= map(analogRead(A2), 0, 1023, 0, 30); } Video