main.cpp

00001 // includes
00002 
00003 #include "mbed.h"
00004 #include "EthernetNetIf.h"
00005 #include "HTTPClient.h"
00006 #include "DHT22.h"
00007 
00008 EthernetNetIf eth;
00009 HTTPClient http;
00010 
00011 // feed with 2 streams
00012 char contentTemplate[] =  "{ \
00013   \"title\":\"TITLE HERE\", \"version\":\"1.0.0\",\
00014   \"datastreams\":[\
00015     { \"id\":\"STREAM ID\", \"current_value\":\"%d\"},\
00016     { \"id\":\"STREAM ID\", \"current_value\":\"%d\"}\
00017   ]\
00018 }" ;
00019 
00020 
00021 char content[200] ;
00022 
00023 DHT22 dht22(p15) ;
00024 
00025 int main() {
00026 
00027     HTTPText txt;
00028     int r ;
00029 
00030     printf("Start\n");
00031     printf("\r\nSetting up...\r\n");
00032     EthernetErr ethErr = eth.setup();
00033     if (ethErr) {
00034         printf("Error %d in setup.\n", ethErr);
00035         return -1;
00036     }
00037     printf("\r\nSetup OK\r\n");
00038 
00039     // copy API key from settings
00040     string apiKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
00041 
00042     // use feed ID
00043     string environmentID = "xxxxx";
00044 
00045     // for authentication, API key is set in client header
00046     HTTPClient client;
00047     client.setRequestHeader("X-PachubeApiKey", apiKey);
00048 
00049     // text object holds data to be posted
00050     HTTPText jsonContent("text/json");
00051 
00052     while (1) {
00053         dht22.sample() ;
00054         sprintf(content, contentTemplate, dht22.getHumidity()/10.0, dht22.getTemperature()/10.0) ;
00055         printf("Json: %s\n", content) ;
00056         jsonContent.set(content) ;
00057 
00058         // uri for post includes feed ID
00059         string uri = "http://api.pachube.com/v2/feeds/" + environmentID + ".json?_method=put";
00060 
00061         // result should be 0 and response should be 200 for successful post
00062         HTTPResult result = client.post(uri.c_str(), jsonContent, NULL);
00063 
00064         if (result==HTTP_OK) {
00065             printf("Result :\"%s\"\n", txt.gets());
00066         } else {
00067             printf("Error %d\n", result);
00068         }
00069 
00070 
00071         r = client.getHTTPResponseCode();
00072         if (result==HTTP_OK) {
00073             printf("Result :\"%d\"\n", r);
00074         } else {
00075             printf("Error %d\n", r);
00076         }
00077 
00078         wait(60) ;
00079     }
00080 }