The project is about embedding temperature sensor, a PIR sensor and a thermocouple with RFID as a security measure and sending the data to ThingSpeak Cloud with a WiFi module ESP8266
Dependencies: DHT ESP8266 MFRC522
Diff: main.cpp
- Revision:
- 0:94f21066fc43
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Tue Mar 28 17:19:25 2017 +0000 @@ -0,0 +1,218 @@ +#include "mbed.h" +#include "MFRC522.h" +#include "DHT.h" +#include "ESP8266.h" // Include header file +#include "math.h" +#include <string> + +#define APIKEY D9BGPWTNAGUAZPMB //Put "Write key" of your channel in thingspeak.com +#define IP "184.106.153.149" // IP Address of "api.thingspeak.com\" +#define WIFI_SSID "Archit" +#define WIFI_PASS "archit12" + +ESP8266 esp(PTC17, PTC16, 115200); // baud rate for wifi + +// FRDM-K64F (Freescale) Pin for MFRC522 reset +#define MF_RESET PTB19 + +// Defining the serial ports for PC and Bluetooth +#define SERIAL_1 +AnalogIn check(PTB3); //thermocouple Analog input + +Serial pc(USBTX, USBRX); +DHT sensor(PTC2,DHT22); //DHT Sensor +DigitalOut LedGreen(LED2), LedRed(LED1); +DigitalIn inputPin(PTB13); // pir senor input + +int val=1; +float tmp_f, tmp_c, hum; +Timer timeBetweenCards; +char tagname; + +uint8_t user[10]; +char Richard[17]="A6027B026802A102"; +char tempo[17]; +char snd[255],rcv[1000],snd_Data[255]; +float x=0; + +//MFRC522 RfChip (SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS, MF_RESET); +MFRC522 RfChip (PTC6, PTC7, PTC5, PTC3, PTB19); + +void esp_initialize(void); +void esp_send(void); + +int main(void) +{ + pc.baud(115200); + esp_initialize(); + LedRed= 0; + + // Initialising RC522 Chip + RfChip.PCD_Init(); + + while (true) + + { + if(inputPin==1) + + { + printf("Motion Detected!\r\n"); + printf("************************************************\r\n"); + printf("You have approached Omnisite Monitioring Solutions!\r\n"); + printf("------------------------------------------------------------\r\n"); + printf("Place Your ID to get access:\r\n"); + printf("------------------------------------------------------------\r\n"); + wait(2); + tagname = '\0'; + LedRed= 1; + LedGreen = 1; + + // checking for new cards + if ( ! RfChip.PICC_IsNewCardPresent()) { + wait_ms(100); + continue; + } + + // Selecting one of the cards or key chains + if ( ! RfChip.PICC_ReadCardSerial()) { + wait_ms(1000); + continue; + } + + // When a card is detected, a Green Led flashes! + timeBetweenCards.start(); + LedGreen = 0; + + for (uint8_t i = 0; i < RfChip.uid.size; i++) { + user[i]=RfChip.uid.uidByte[i]; + } + + sprintf(tempo,"%X02%X02%X02%X02",user[0],user[1],user[2],user[3]); + printf("\n\r"); + if (strcmp(tempo, Richard)==0) { + //Thermocouple program + pc.printf("Thermocouple Output:\r\n"); + x=0; + x= check.read_u16(); + x=x/65536; // ADC Scaling + x=x*330; // GPIO Scaling and IC Scaling(*100) + pc.printf("Voltage Difference = %.2f C\n\r",x); + wait(3); + + + //DHT + int err; + printf("\r\nDHT Test program"); + printf("\r\n******************\r\n"); + err = sensor.readData(); + if (err == 0) { + printf("Temperature is %4.2f C \r\n",sensor.ReadTemperature(CELCIUS)); + printf("Temperature is %4.2f F \r\n",sensor.ReadTemperature(FARENHEIT)); + printf("Temperature is %4.2f K \r\n",sensor.ReadTemperature(KELVIN)); + printf("Humidity is %4.2f \r\n",sensor.ReadHumidity()); + printf("Dew point is %4.2f \r\n",sensor.CalcdewPoint(sensor.ReadTemperature(CELCIUS), sensor.ReadHumidity())); + printf("Dew point (fast) is %4.2f \r\n",sensor.CalcdewPointFast(sensor.ReadTemperature(CELCIUS), sensor.ReadHumidity())); + printf("--------------------------------------------\r\n"); + } + wait(2); + + tmp_f = sensor.ReadTemperature(FARENHEIT); + tmp_c = sensor.ReadTemperature(CELCIUS); + hum = sensor.ReadHumidity(); + + esp_send(); + } else if (strcmp(tempo, Richard)!=0) { + printf("NOT AUTHORISED\n\r"); + + } + + } else if(inputPin==0) { + } + wait(5); + } +} + +void esp_initialize(void) +{ + pc.printf("Initializing ESP\r\n"); + + pc.printf("Reset ESP\r\n"); + esp.Reset(); //RESET ESP + esp.RcvReply(rcv, 400); //receive a response from ESP + wait(2); + + strcpy(snd,"AT"); + esp.SendCMD(snd); + pc.printf(snd); + esp.RcvReply(rcv, 400); + pc.printf(rcv); + wait(0.1); + + strcpy(snd,"AT+CWMODE=1"); + esp.SendCMD(snd); + pc.printf(snd); + wait(2); + + strcpy(snd,"AT+CWJAP=\""); + strcat(snd,WIFI_SSID); + strcat(snd,"\",\""); + strcat(snd,WIFI_PASS); + strcat(snd,"\""); + + esp.SendCMD(snd); + pc.printf(snd); + wait(5); + esp.RcvReply(rcv, 400); + pc.printf("\n %s \n", rcv); + + strcpy(snd,"AT+CIPMUX=1"); + esp.SendCMD(snd); + pc.printf(snd); + esp.RcvReply(rcv, 400); + pc.printf("\n %s \n", rcv); + +} + +void esp_send(void) +{ + //ESP updates the Status of Thingspeak channel// + + strcpy(snd,"AT+CIPSTART="); + strcat(snd,"\"TCP\",\""); + strcat(snd,IP); + strcat(snd,"\",80"); + + esp.SendCMD(snd); + pc.printf("Send\r\n%s",snd); + esp.RcvReply(rcv, 1000); + pc.printf("Receive\r\n%s",rcv); + wait(1); + + sprintf(snd,"GET https://api.thingspeak.com/update?api_key=D9BGPWTNAGUAZPMB&field1=%f&field2=%f&field3=%f&field4=%.2f\r\n",tmp_f,tmp_c,hum,x); + + int i=0; + for(i=0; snd[i]!='\0'; i++); + i++; + char cmd[255]; + + sprintf(cmd,"AT+CIPSEND=%d",i); //Send Number of open connection and Characters to send + esp.SendCMD(cmd); + pc.printf("Send\r\n%s",cmd); + while(i<=20 || rcv == ">") { + esp.RcvReply(rcv, 1000); + wait(100); + i++; + } + pc.printf("Receive\r\n%s",rcv); + + esp.SendCMD(snd); //Post value to thingspeak channel + pc.printf("Send\r\n%s",snd); + + while(i<=20 || rcv == "OK") { + esp.RcvReply(rcv, 1000); + wait(100); + i++; + } + pc.printf("Receive\r\n%s",rcv); +} +