PIR Motion Alarm system + ESP8266 WiFi module was implemented using FRDM-k64f. PIR sensor will detect motion around its environment and then will send update information to Thingspeak.com website through wifi connection. The main components used in this project: Parallax PIR sensor, LED, ESP8266 WiFi module, 3.0 to 28VDC Voltage range Piezo buzzer.
main.cpp
- Committer:
- mokhanaf
- Date:
- 2015-05-14
- Revision:
- 0:bab4cf7cdda8
File content as of revision 0:bab4cf7cdda8:
// PIR Motion Sensor Alarm + ESP8622 WiFi Module + FRDM-k64f //PIR sensor can detect change on its surrounding by measuring the change of infra red // Then will send high=1 to the FRDM-k64f to flash the LED, Run the Buzzer, //Send information through UART serial Port to Tera Term and display how many motion been //detected,also will send information to Thingspeak IoT website using WiFi connection #include "mbed.h" #include "ESP8266.h" #define APIKEY 7X2TD78DKY4459M0 Serial pc(USBTX,USBRX); DigitalOut Buzzer(D10); // output PwmOut LED(D13); // flashing the led DigitalIn inputPin(D2); // pir senor input DigitalOut redled(LED1); ESP8266 wifi(PTC17, PTC16, 115200); // baud rate for wifi char snd[255],rcv[1000]; #define IP "184.106.153.149" // thingspeak.com IP Address int val = 0; // value to holed the high/low info from pir from pin D2 int cnt = 0; // counter for motion //String thingtweetAPIKey = "TTEVLP931ODJ5GMT"; /************ WiFi INTIALIZATION *********/ void wifi_initialize(void); void wifi_send(void); int main () { pc.baud(115200); pc.printf("SET mode to AP\r\n"); wifi.SetMode(1); // set ESP mode to 1 wifi.RcvReply(rcv, 1000); //receive a response from ESP pc.printf("%s",rcv); //Print the response onscreen pc.printf("Conneting to AP\r\n"); wifi.Join("Network", "Password"); // Your wifi username & Password wifi.RcvReply(rcv, 1000); //receive a response from ESP pc.printf("%s", rcv); //Print the response onscreen wait(8); //waits for response from ESP pc.printf("Getting IP\r\n"); //get IP addresss from the connected AP wifi.GetIP(rcv); //receive an IP address from the AP pc.printf("%s", rcv); wait(5); // Delay 5 sec to give the pir time to get snapshut of the surrounding pc.printf("Initializing WiFi\r\n"); //wifi_initialize(); while (1) { val = inputPin.read(); if (val==0) { cnt++; pc.printf(" The Sensor is ON And I Detected = %i Till NOW\r\n",cnt); pc.printf("PLEASE STAY AWAY\r\n"); pc.printf("Sending WiFi information"); wifi_send(); redled=1; // when the motion detected turn of the on board red led LED.period(2.0f); // 2 seconds period wait(2.0f); LED.pulsewidth(.02); // 2 mseconds pulse (on) redled=1; Buzzer = 1; wait(1.5f); } else { pc.printf(" The Sensor is OFF \r\n"); LED = 0; Buzzer =0; redled=0; // turn the on board red led on wait(1.5f); } } } void wifi_send(void){ //WIFI updates the Status to Thingspeak servers// strcpy(snd,"AT+CIPMUX=1");//Setting WiFi into MultiChannel mode wifi.SendCMD(snd); pc.printf(snd); wait(2.0); wifi.RcvReply(rcv, 1000); pc.printf("%s", rcv); wait(2); sprintf(snd,"AT+CIPSTART=4,\"TCP\",\"%s\",80",IP); //Initiate connection with THINGSPEAK server pc.printf(snd); wait(3.0); wifi.RcvReply(rcv, 1000); pc.printf("%s", rcv); wait(2); strcpy(snd,"AT+CIPSEND=4,47"); //Send Number of open connections,Characters to send wifi.SendCMD(snd); pc.printf(snd); wait(2.0); wifi.RcvReply(rcv, 1000); pc.printf("%s", rcv); wait(2); sprintf(snd,"GET /update?key=7X2TD78DKY4459M0&field1=%2.2f\r\n",1.0); //Post values to thingspeak pc.printf("%s",snd); wifi.SendCMD(snd); wait(3.0f); wifi.RcvReply(rcv, 1000); pc.printf("%s", rcv); wifi.SendCMD("AT+CIPCLOSE"); //Close the connection to server wifi.RcvReply(rcv, 1000); pc.printf("%s", rcv); }