Padmaja Krishnakumar / Mbed 2 deprecated esp8266_http_POST

esp 8266, a low cost wifi establishes tcp connection with a cloud server. A POST http request is sent. AT commands are used for communication.

Dependencies:   DHT mbed

main.cpp@0:824af42f88ff, 2016-05-06 (annotated)

Committer:
pakrishn
Date:
Fri May 06 13:49:18 2016 +0000
Revision:
0:824af42f88ff
esp8266 sends POST http request to ubidots website

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pakrishn 0:824af42f88ff 1 #include "mbed.h"
pakrishn 0:824af42f88ff 2 #include "DHT.h"
pakrishn 0:824af42f88ff 3
pakrishn 0:824af42f88ff 4 Serial pc(USBTX, USBRX);
pakrishn 0:824af42f88ff 5 Serial esp(PTC17, PTC16); //FRDM K64F
pakrishn 0:824af42f88ff 6
pakrishn 0:824af42f88ff 7 DHT sensor(D4, DHT11);
pakrishn 0:824af42f88ff 8 DigitalIn pirInputPin(D2);
pakrishn 0:824af42f88ff 9
pakrishn 0:824af42f88ff 10 Timer t1;
pakrishn 0:824af42f88ff 11
pakrishn 0:824af42f88ff 12 int count,ended,timeout,getcount,replycount;
pakrishn 0:824af42f88ff 13 char replybuff[1024];
pakrishn 0:824af42f88ff 14 char cmdbuff[255];
pakrishn 0:824af42f88ff 15
pakrishn 0:824af42f88ff 16 void SendCMD(),getreply(),getMotionSensor(),gettemp(), ESPconfig();
pakrishn 0:824af42f88ff 17 void sendUbidotsData(int sensor, float value);
pakrishn 0:824af42f88ff 18
pakrishn 0:824af42f88ff 19
pakrishn 0:824af42f88ff 20 int main()
pakrishn 0:824af42f88ff 21 {
pakrishn 0:824af42f88ff 22 pc.baud(115200);
pakrishn 0:824af42f88ff 23 esp.baud(115200);
pakrishn 0:824af42f88ff 24 ESPconfig();
pakrishn 0:824af42f88ff 25 while(1){
pakrishn 0:824af42f88ff 26 wait(2);
pakrishn 0:824af42f88ff 27 gettemp();
pakrishn 0:824af42f88ff 28 wait(2);
pakrishn 0:824af42f88ff 29 getMotionSensor();
pakrishn 0:824af42f88ff 30 }
pakrishn 0:824af42f88ff 31
pakrishn 0:824af42f88ff 32 }
pakrishn 0:824af42f88ff 33
pakrishn 0:824af42f88ff 34
pakrishn 0:824af42f88ff 35
pakrishn 0:824af42f88ff 36 //configuration of esp8266
pakrishn 0:824af42f88ff 37 void ESPconfig()
pakrishn 0:824af42f88ff 38 {
pakrishn 0:824af42f88ff 39 timeout=1000;getcount=600;
pakrishn 0:824af42f88ff 40 wait(1);
pakrishn 0:824af42f88ff 41 strcpy(cmdbuff,"AT\r\n");
pakrishn 0:824af42f88ff 42 SendCMD();
pakrishn 0:824af42f88ff 43 timeout=1;
pakrishn 0:824af42f88ff 44 getreply();
pakrishn 0:824af42f88ff 45 wait(1);
pakrishn 0:824af42f88ff 46
pakrishn 0:824af42f88ff 47 pc.printf("Reset & get Firmware\r\n");
pakrishn 0:824af42f88ff 48 strcpy(cmdbuff,"AT+RST\r\n");
pakrishn 0:824af42f88ff 49 SendCMD();
pakrishn 0:824af42f88ff 50 timeout=5;
pakrishn 0:824af42f88ff 51 getreply();
pakrishn 0:824af42f88ff 52 pc.printf(replybuff);
pakrishn 0:824af42f88ff 53
pakrishn 0:824af42f88ff 54 wait(2);
pakrishn 0:824af42f88ff 55
pakrishn 0:824af42f88ff 56 pc.printf("\nGet Version\r\n");
pakrishn 0:824af42f88ff 57 strcpy(cmdbuff,"AT+GMR\r\n");
pakrishn 0:824af42f88ff 58 SendCMD();
pakrishn 0:824af42f88ff 59 timeout=4;
pakrishn 0:824af42f88ff 60 getreply();
pakrishn 0:824af42f88ff 61 pc.printf(replybuff);
pakrishn 0:824af42f88ff 62
pakrishn 0:824af42f88ff 63 wait(3);
pakrishn 0:824af42f88ff 64
pakrishn 0:824af42f88ff 65 // set CWMODE to 1=Station,2=AP,3=BOTH, default mode 1 (Station)
pakrishn 0:824af42f88ff 66 pc.printf("\nSetting Mode\r\n");
pakrishn 0:824af42f88ff 67 strcpy(cmdbuff, "AT+CWMODE=1\r\n");
pakrishn 0:824af42f88ff 68 SendCMD();
pakrishn 0:824af42f88ff 69 timeout=4;
pakrishn 0:824af42f88ff 70 getreply();
pakrishn 0:824af42f88ff 71 pc.printf(replybuff);
pakrishn 0:824af42f88ff 72
pakrishn 0:824af42f88ff 73 wait(2);
pakrishn 0:824af42f88ff 74
pakrishn 0:824af42f88ff 75 // set CIPMUX to 0=Single,1=Multi
pakrishn 0:824af42f88ff 76 pc.printf("\nSetting Connection Mode\r\n");
pakrishn 0:824af42f88ff 77 strcpy(cmdbuff, "AT+CIPMUX=1\r\n");
pakrishn 0:824af42f88ff 78 SendCMD();
pakrishn 0:824af42f88ff 79 timeout=4;
pakrishn 0:824af42f88ff 80 getreply();
pakrishn 0:824af42f88ff 81 pc.printf(replybuff);
pakrishn 0:824af42f88ff 82
pakrishn 0:824af42f88ff 83
pakrishn 0:824af42f88ff 84 wait(2);
pakrishn 0:824af42f88ff 85
pakrishn 0:824af42f88ff 86 pc.printf("\nConnecting to AP\r\n");
pakrishn 0:824af42f88ff 87 pc.printf("ssid = %s pwd = %s\r\n","ssid","password");
pakrishn 0:824af42f88ff 88 strcpy(cmdbuff, "AT+CWJAP=\"");
pakrishn 0:824af42f88ff 89 strcat(cmdbuff, "galaxy");
pakrishn 0:824af42f88ff 90 strcat(cmdbuff, "\",\"");
pakrishn 0:824af42f88ff 91 strcat(cmdbuff, "123456789");
pakrishn 0:824af42f88ff 92 strcat(cmdbuff, "\"\r\n");
pakrishn 0:824af42f88ff 93 SendCMD();
pakrishn 0:824af42f88ff 94 timeout=10;
pakrishn 0:824af42f88ff 95 getreply();
pakrishn 0:824af42f88ff 96 pc.printf(replybuff);
pakrishn 0:824af42f88ff 97
pakrishn 0:824af42f88ff 98 wait(5);
pakrishn 0:824af42f88ff 99
pakrishn 0:824af42f88ff 100
pakrishn 0:824af42f88ff 101
pakrishn 0:824af42f88ff 102 pc.printf("\nGet Connection Status\r\n");
pakrishn 0:824af42f88ff 103 strcpy(cmdbuff, "AT+CIPSTATUS\r\n");
pakrishn 0:824af42f88ff 104 SendCMD();
pakrishn 0:824af42f88ff 105 timeout=5;
pakrishn 0:824af42f88ff 106 getreply();
pakrishn 0:824af42f88ff 107 pc.printf(replybuff);
pakrishn 0:824af42f88ff 108
pakrishn 0:824af42f88ff 109 wait(1);
pakrishn 0:824af42f88ff 110
pakrishn 0:824af42f88ff 111 }
pakrishn 0:824af42f88ff 112 //temperature sensor reads the temp
pakrishn 0:824af42f88ff 113 void gettemp()
pakrishn 0:824af42f88ff 114 {
pakrishn 0:824af42f88ff 115 float temperature = 0.0f;
pakrishn 0:824af42f88ff 116 int error = 0;
pakrishn 0:824af42f88ff 117
pakrishn 0:824af42f88ff 118 wait(2.0f);
pakrishn 0:824af42f88ff 119 error = sensor.readData();
pakrishn 0:824af42f88ff 120 if (error == 0) {
pakrishn 0:824af42f88ff 121 temperature = sensor.ReadTemperature(FARENHEIT);
pakrishn 0:824af42f88ff 122 pc.printf("Temperature in Farenheit %3.2f\n",temperature);
pakrishn 0:824af42f88ff 123 }
pakrishn 0:824af42f88ff 124 else{
pakrishn 0:824af42f88ff 125 pc.printf("Error: %d\n",error);
pakrishn 0:824af42f88ff 126 }
pakrishn 0:824af42f88ff 127
pakrishn 0:824af42f88ff 128 sendUbidotsData(2, temperature);
pakrishn 0:824af42f88ff 129 wait(2);
pakrishn 0:824af42f88ff 130 }
pakrishn 0:824af42f88ff 131
pakrishn 0:824af42f88ff 132 //pir sensor detects if there is motion
pakrishn 0:824af42f88ff 133 void getMotionSensor(){
pakrishn 0:824af42f88ff 134 pc.printf("get motion sensor");
pakrishn 0:824af42f88ff 135 int val = pirInputPin.read(); // Continuously Read output of PIR sensor on D2 pin
pakrishn 0:824af42f88ff 136 if (val==0) // val=0 means there is a motion
pakrishn 0:824af42f88ff 137 {
pakrishn 0:824af42f88ff 138 for(int i =0;i<3 && val==0;i++)
pakrishn 0:824af42f88ff 139 {
pakrishn 0:824af42f88ff 140 val = pirInputPin.read();
pakrishn 0:824af42f88ff 141 wait(1);
pakrishn 0:824af42f88ff 142 }
pakrishn 0:824af42f88ff 143 if (val==0)
pakrishn 0:824af42f88ff 144 sendUbidotsData(1, 1.0);
pakrishn 0:824af42f88ff 145 }
pakrishn 0:824af42f88ff 146 else
pakrishn 0:824af42f88ff 147 wait(2);
pakrishn 0:824af42f88ff 148 }
pakrishn 0:824af42f88ff 149
pakrishn 0:824af42f88ff 150 //post dat ato ubidots website
pakrishn 0:824af42f88ff 151 //pir=1,temp=2
pakrishn 0:824af42f88ff 152 void sendUbidotsData(int sensor, float value){
pakrishn 0:824af42f88ff 153 char postData[255];
pakrishn 0:824af42f88ff 154 char valueChar[10];
pakrishn 0:824af42f88ff 155 char valLenChar[7];
pakrishn 0:824af42f88ff 156 int valLength = sprintf(valueChar,"%3.1f",value);
pakrishn 0:824af42f88ff 157 valLength = valLength+13;
pakrishn 0:824af42f88ff 158 sprintf(valLenChar,"%ld",valLength);
pakrishn 0:824af42f88ff 159
pakrishn 0:824af42f88ff 160 if(sensor == 1)
pakrishn 0:824af42f88ff 161 strcpy(postData, "POST /api/v1.6/variables/variable_id1/values/?token=token_id HTTP/1.1\r\n");
pakrishn 0:824af42f88ff 162 else{
pakrishn 0:824af42f88ff 163 strcpy(postData, "POST /api/v1.6/variables/variable_id2/values/?token=token_id HTTP/1.1\r\n");
pakrishn 0:824af42f88ff 164 }
pakrishn 0:824af42f88ff 165 strcat(postData, "Host: things.ubidots.com\r\n");
pakrishn 0:824af42f88ff 166 strcat(postData, "Content-Type: application/json\r\n");
pakrishn 0:824af42f88ff 167 strcat(postData, "Content-Length: ");
pakrishn 0:824af42f88ff 168 strcat(postData, valLenChar);
pakrishn 0:824af42f88ff 169 strcat(postData, "\r\n\r\n");
pakrishn 0:824af42f88ff 170 strcat(postData, "{\"value\": \"");
pakrishn 0:824af42f88ff 171 strcat(postData, valueChar);
pakrishn 0:824af42f88ff 172 strcat(postData, "\"}\r\n\r\n");
pakrishn 0:824af42f88ff 173
pakrishn 0:824af42f88ff 174 timeout=1000;getcount=600;
pakrishn 0:824af42f88ff 175
pakrishn 0:824af42f88ff 176 pc.printf("\nStart TCP\r\n");
pakrishn 0:824af42f88ff 177 strcpy(cmdbuff, "AT+CIPSTART=4,\"TCP\",\"things.ubidots.com\",80\r\n");
pakrishn 0:824af42f88ff 178 SendCMD();
pakrishn 0:824af42f88ff 179 timeout=5;
pakrishn 0:824af42f88ff 180 getreply();
pakrishn 0:824af42f88ff 181 pc.printf(replybuff);
pakrishn 0:824af42f88ff 182
pakrishn 0:824af42f88ff 183 wait(5);
pakrishn 0:824af42f88ff 184
pakrishn 0:824af42f88ff 185 pc.printf("\nConnecting\r\n");
pakrishn 0:824af42f88ff 186 sprintf(cmdbuff, "AT+CIPSEND=4,%d\r\n",strlen(postData));//strlen(postData)
pakrishn 0:824af42f88ff 187 SendCMD();
pakrishn 0:824af42f88ff 188 wait(3);
pakrishn 0:824af42f88ff 189 timeout=5;
pakrishn 0:824af42f88ff 190 getreply();
pakrishn 0:824af42f88ff 191 pc.printf(replybuff);
pakrishn 0:824af42f88ff 192
pakrishn 0:824af42f88ff 193 wait(2);
pakrishn 0:824af42f88ff 194
pakrishn 0:824af42f88ff 195 pc.printf("\nPOST Request\r\n");
pakrishn 0:824af42f88ff 196 strcpy(cmdbuff, postData);
pakrishn 0:824af42f88ff 197 SendCMD();
pakrishn 0:824af42f88ff 198 wait(7);
pakrishn 0:824af42f88ff 199 timeout=5;
pakrishn 0:824af42f88ff 200 getreply();
pakrishn 0:824af42f88ff 201 pc.printf(replybuff);
pakrishn 0:824af42f88ff 202
pakrishn 0:824af42f88ff 203 wait(5);
pakrishn 0:824af42f88ff 204 pc.printf("\nClose TCP\r\n");
pakrishn 0:824af42f88ff 205 strcpy(cmdbuff, "AT+CIPCLOSE\r\n");
pakrishn 0:824af42f88ff 206 SendCMD();
pakrishn 0:824af42f88ff 207 timeout=5;
pakrishn 0:824af42f88ff 208 getreply();
pakrishn 0:824af42f88ff 209 pc.printf(replybuff);
pakrishn 0:824af42f88ff 210
pakrishn 0:824af42f88ff 211 wait(2);
pakrishn 0:824af42f88ff 212 }
pakrishn 0:824af42f88ff 213
pakrishn 0:824af42f88ff 214
pakrishn 0:824af42f88ff 215 // ESP Command data send
pakrishn 0:824af42f88ff 216 void SendCMD()
pakrishn 0:824af42f88ff 217 {
pakrishn 0:824af42f88ff 218 esp.printf("%s", cmdbuff);
pakrishn 0:824af42f88ff 219 }
pakrishn 0:824af42f88ff 220
pakrishn 0:824af42f88ff 221 void getreply()
pakrishn 0:824af42f88ff 222 {
pakrishn 0:824af42f88ff 223 memset(replybuff, '\0', sizeof(replybuff));
pakrishn 0:824af42f88ff 224 t1.reset(); t1.start();replycount=0;
pakrishn 0:824af42f88ff 225 while(t1.read_ms()< timeout && replycount < getcount) {
pakrishn 0:824af42f88ff 226 if(esp.readable()) {
pakrishn 0:824af42f88ff 227 replybuff[replycount] = esp.getc();replycount++;
pakrishn 0:824af42f88ff 228 }
pakrishn 0:824af42f88ff 229 }
pakrishn 0:824af42f88ff 230 t1.stop();
pakrishn 0:824af42f88ff 231 }