Garbage Collectors / Mbed 2 deprecated SLOTrashHTTP

trash over HTTP

Dependencies:   C027_Support HTTPClient TrashSensors mbed Crypto

Fork of SLOTrashHTTP by Corey Ford

Collects sensor readings and sends them to https://trash.coreyford.name/

Server code: https://github.com/coyotebush/trash-map

main.cpp@4:1acb5d26ec21, 2015-05-28 (annotated)

Committer:
coyotebush
Date:
Thu May 28 04:29:26 2015 +0000
Revision:
4:1acb5d26ec21
Parent:
3:1e5d19eb7c9a
Child:
5:21e76b5af13b
Wrap readings in JSON+HMAC

Who changed what in which revision?

UserRevisionLine numberNew contents of line
coyotebush 0:284e9c16e92d 1 #include "mbed.h"
coyotebush 0:284e9c16e92d 2 #include "HTTPClient.h"
coyotebush 0:284e9c16e92d 3
coyotebush 0:284e9c16e92d 4 #include "hcsr04.h"
coyotebush 3:1e5d19eb7c9a 5 #include "GPS.h"
coyotebush 0:284e9c16e92d 6
coyotebush 4:1acb5d26ec21 7 #include "SHA1.h"
coyotebush 4:1acb5d26ec21 8 #include "HMAC.h"
coyotebush 4:1acb5d26ec21 9
coyotebush 0:284e9c16e92d 10 #define TRIG_PIN D6
coyotebush 0:284e9c16e92d 11 #define ECHO_PIN D5
coyotebush 4:1acb5d26ec21 12 #define HTTP_ENDPOINT "http://trash.coreyford.name/sensor"
coyotebush 0:284e9c16e92d 13 #define SENSOR_NAME "Throop"
coyotebush 0:284e9c16e92d 14
coyotebush 2:ecc029c53752 15 #define CELLULAR_NETWORK 1
coyotebush 2:ecc029c53752 16
coyotebush 2:ecc029c53752 17 #ifdef CELLULAR_NETWORK
coyotebush 2:ecc029c53752 18 #include "MDM.h"
coyotebush 2:ecc029c53752 19 #define SIMPIN NULL
coyotebush 2:ecc029c53752 20 #define APN "Broadband"
coyotebush 2:ecc029c53752 21 #define USERNAME NULL
coyotebush 2:ecc029c53752 22 #define PASSWORD NULL
coyotebush 2:ecc029c53752 23 #else
coyotebush 2:ecc029c53752 24 #include "EthernetInterface.h"
coyotebush 2:ecc029c53752 25 #endif
coyotebush 0:284e9c16e92d 26
coyotebush 0:284e9c16e92d 27 int main()
coyotebush 4:1acb5d26ec21 28 {
coyotebush 4:1acb5d26ec21 29 char macAddress[6];
coyotebush 4:1acb5d26ec21 30 mbed_mac_address(macAddress);
coyotebush 4:1acb5d26ec21 31 printf("MAC address is %02X%02X%02X%02X%02X%02X\r\n", macAddress[0], macAddress[1], macAddress[2], macAddress[3], macAddress[4], macAddress[5]);
coyotebush 4:1acb5d26ec21 32
coyotebush 3:1e5d19eb7c9a 33 GPSSerial gps;
coyotebush 3:1e5d19eb7c9a 34
coyotebush 2:ecc029c53752 35 #ifdef CELLULAR_NETWORK
coyotebush 2:ecc029c53752 36 MDMSerial mdm;
coyotebush 2:ecc029c53752 37 //mdm.setDebug(4);
coyotebush 2:ecc029c53752 38 if (!mdm.connect(SIMPIN, APN,USERNAME,PASSWORD))
coyotebush 2:ecc029c53752 39 return -1;
coyotebush 2:ecc029c53752 40 #else
coyotebush 2:ecc029c53752 41 EthernetInterface ethernet;
coyotebush 2:ecc029c53752 42 ethernet.init(); // DHCP
coyotebush 2:ecc029c53752 43 if (ethernet.connect() != 0)
coyotebush 2:ecc029c53752 44 return -1;
coyotebush 2:ecc029c53752 45 #endif
coyotebush 2:ecc029c53752 46 HTTPClient http;
coyotebush 2:ecc029c53752 47
coyotebush 3:1e5d19eb7c9a 48 int gpsRet;
coyotebush 3:1e5d19eb7c9a 49 char gpsBuf[512];
coyotebush 3:1e5d19eb7c9a 50 double lat = 0, lon = 0;
coyotebush 3:1e5d19eb7c9a 51
coyotebush 0:284e9c16e92d 52 HCSR04 distS(TRIG_PIN, ECHO_PIN);
coyotebush 0:284e9c16e92d 53 double distV;
coyotebush 2:ecc029c53752 54 char str[512];
coyotebush 0:284e9c16e92d 55
coyotebush 0:284e9c16e92d 56 while (true) {
coyotebush 3:1e5d19eb7c9a 57 // Distance sensor
coyotebush 0:284e9c16e92d 58 distS.start();
coyotebush 0:284e9c16e92d 59 wait_ms(500);
coyotebush 0:284e9c16e92d 60 distV = distS.get_dist_cm();
coyotebush 4:1acb5d26ec21 61 printf("sensor reading: %0.2f\r\n", distV);
coyotebush 3:1e5d19eb7c9a 62
coyotebush 3:1e5d19eb7c9a 63 // GPS
coyotebush 3:1e5d19eb7c9a 64 printf("trying GPS\r\n");
coyotebush 3:1e5d19eb7c9a 65 while ((gpsRet = gps.getMessage(gpsBuf, sizeof(gpsBuf))) > 0)
coyotebush 3:1e5d19eb7c9a 66 {
coyotebush 3:1e5d19eb7c9a 67 int len = LENGTH(gpsRet);
coyotebush 3:1e5d19eb7c9a 68 char ch;
coyotebush 3:1e5d19eb7c9a 69 //printf("NMEA: %.*s\r\n", len-2, gpsBuf);
coyotebush 3:1e5d19eb7c9a 70 if ((PROTOCOL(gpsRet) == GPSParser::NMEA) && (len > 6)
coyotebush 3:1e5d19eb7c9a 71 && strncmp(gpsBuf, "$G", 2) == 0
coyotebush 3:1e5d19eb7c9a 72 && strncmp(gpsBuf + 3, "GLL", 3) == 0
coyotebush 3:1e5d19eb7c9a 73 && gps.getNmeaAngle(1,gpsBuf,len,lat)
coyotebush 3:1e5d19eb7c9a 74 && gps.getNmeaAngle(3,gpsBuf,len,lon)
coyotebush 3:1e5d19eb7c9a 75 && gps.getNmeaItem(6,gpsBuf,len,ch)
coyotebush 3:1e5d19eb7c9a 76 && ch == 'A')
coyotebush 3:1e5d19eb7c9a 77 {
coyotebush 3:1e5d19eb7c9a 78 printf("GPS Location: %.5f %.5f\r\n", lat, lon);
coyotebush 3:1e5d19eb7c9a 79 break;
coyotebush 3:1e5d19eb7c9a 80 }
coyotebush 3:1e5d19eb7c9a 81 }
coyotebush 0:284e9c16e92d 82
coyotebush 4:1acb5d26ec21 83 // Combine readings in JSON
coyotebush 4:1acb5d26ec21 84 char json[255];
coyotebush 4:1acb5d26ec21 85 snprintf(json, 255, "{\"distance\":%0.1f,\"latitude\":%0.5f,\"longitude\":%0.5f}", distV, lat, lon);
coyotebush 4:1acb5d26ec21 86
coyotebush 4:1acb5d26ec21 87 // Compute a MAC (message authentication code) of the value,
coyotebush 4:1acb5d26ec21 88 // using our MAC (media access control) address as a key.
coyotebush 4:1acb5d26ec21 89 // Yay acronyms.
coyotebush 4:1acb5d26ec21 90 SHA1 hasher;
coyotebush 4:1acb5d26ec21 91 HMAC hmacer(&hasher, (uint8_t *)macAddress, sizeof(macAddress));
coyotebush 4:1acb5d26ec21 92 hmacer.update((uint8_t *)json, strlen(json));
coyotebush 4:1acb5d26ec21 93 uint8_t hmac[20];
coyotebush 4:1acb5d26ec21 94 hmacer.finalize(hmac);
coyotebush 4:1acb5d26ec21 95 char hmacHex[41], *hmacHexPtr = hmacHex;
coyotebush 4:1acb5d26ec21 96 for (int i = 0; i < 20; i++)
coyotebush 4:1acb5d26ec21 97 hmacHexPtr += sprintf(hmacHexPtr, "%02X", hmac[i]);
coyotebush 4:1acb5d26ec21 98
coyotebush 0:284e9c16e92d 99 //POST data
coyotebush 0:284e9c16e92d 100 HTTPMap map;
coyotebush 0:284e9c16e92d 101 HTTPText inText(str, 512);
coyotebush 0:284e9c16e92d 102 map.put("name", SENSOR_NAME);
coyotebush 4:1acb5d26ec21 103 map.put("value", json);
coyotebush 4:1acb5d26ec21 104 map.put("mac", hmacHex);
coyotebush 0:284e9c16e92d 105 printf("\r\nTrying to post data...\r\n");
coyotebush 4:1acb5d26ec21 106 int ret = http.post(HTTP_ENDPOINT, map, &inText);
coyotebush 0:284e9c16e92d 107 if (!ret)
coyotebush 0:284e9c16e92d 108 {
coyotebush 0:284e9c16e92d 109 printf("Executed POST successfully - read %d characters\r\n", strlen(str));
coyotebush 0:284e9c16e92d 110 printf("Result: %s\r\n", str);
coyotebush 0:284e9c16e92d 111 }
coyotebush 0:284e9c16e92d 112 else
coyotebush 0:284e9c16e92d 113 {
coyotebush 0:284e9c16e92d 114 printf("Error - ret = %d - HTTP return code = %d\r\n", ret, http.getHTTPResponseCode());
coyotebush 0:284e9c16e92d 115 }
coyotebush 0:284e9c16e92d 116
coyotebush 1:929b55ff96b0 117 wait_ms(10000);
coyotebush 0:284e9c16e92d 118 }
coyotebush 0:284e9c16e92d 119 }