marko puric / ThingSpeakEthernet

Library for writing and reading on ThingSpeak with ethernet

Dependents:   PMS5003 PMS5003

ThingSpeak.cpp@2:5191c0e163d6, 2017-06-28 (annotated)

Committer:
mpuric
Date:
Wed Jun 28 18:35:29 2017 +0000
Revision:
2:5191c0e163d6
Parent:
1:ea7f0ef29ef5 
added api doc

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mpuric 0:a7bce9e88175 1 #include "mbed.h"
mpuric 0:a7bce9e88175 2 #include "EthernetNetIf.h"
mpuric 0:a7bce9e88175 3 #include "HTTPClient.h"
mpuric 0:a7bce9e88175 4 #include "ThingSpeak.h"
mpuric 0:a7bce9e88175 5
mpuric 0:a7bce9e88175 6 Serial pc(USBTX, USBRX);
mpuric 0:a7bce9e88175 7
mpuric 0:a7bce9e88175 8 ThingSpeak::ThingSpeak(char* Key) : thingSpeakKey(Key) {
mpuric 0:a7bce9e88175 9 thingSpeakUrl = "https://api.thingspeak.com/update";
mpuric 0:a7bce9e88175 10 thingSpeakRead = "https://api.thingspeak.com/channels/";
mpuric 0:a7bce9e88175 11 urlBuffer[0] = 0;
mpuric 0:a7bce9e88175 12 fieldBuffer[0] = 0;
mpuric 0:a7bce9e88175 13 }
mpuric 1:ea7f0ef29ef5 14
mpuric 0:a7bce9e88175 15 float ThingSpeak::pull(long int readKey, int field) {
mpuric 0:a7bce9e88175 16 sprintf(urlBuffer, "%s%d/fields/%d/last", thingSpeakRead, readKey, field );
mpuric 0:a7bce9e88175 17 pc.printf("URL Buffer request: %s ", urlBuffer);
mpuric 0:a7bce9e88175 18 res = http.get(urlBuffer, &resp);
mpuric 0:a7bce9e88175 19 if (res == HTTP_OK){
mpuric 0:a7bce9e88175 20 pc.printf(" Result :\"%s\"\r\n,", resp.gets(), res);
mpuric 0:a7bce9e88175 21 float resp2 = atoi(resp.gets());
mpuric 0:a7bce9e88175 22 return resp2;
mpuric 0:a7bce9e88175 23 }
mpuric 0:a7bce9e88175 24 else {
mpuric 0:a7bce9e88175 25 pc.printf(" Error %d\r\n", res);
mpuric 0:a7bce9e88175 26 return false;
mpuric 0:a7bce9e88175 27 }
mpuric 0:a7bce9e88175 28 }
mpuric 1:ea7f0ef29ef5 29
mpuric 0:a7bce9e88175 30 void ThingSpeak::connect() {
mpuric 0:a7bce9e88175 31 pc.printf("Setting up Ethernet...\r\n");
mpuric 0:a7bce9e88175 32 EthernetErr ethErr = eth.setup();
mpuric 0:a7bce9e88175 33 if(ethErr){
mpuric 0:a7bce9e88175 34 pc.printf("Error %d in ethernet setup.\r\n", ethErr);
mpuric 0:a7bce9e88175 35 connect();
mpuric 0:a7bce9e88175 36 }
mpuric 0:a7bce9e88175 37 pc.printf("Ethernet setup OK\r\n");
mpuric 0:a7bce9e88175 38 }
mpuric 1:ea7f0ef29ef5 39
mpuric 0:a7bce9e88175 40 void ThingSpeak::setField(float field, int i) {
mpuric 0:a7bce9e88175 41 char fieldi;
mpuric 0:a7bce9e88175 42 char fieldShortBuff[8];
mpuric 0:a7bce9e88175 43 sprintf(fieldShortBuff, "%f", field);
mpuric 0:a7bce9e88175 44 sprintf(&fieldi, "%i", i);
mpuric 0:a7bce9e88175 45 strncat(fieldBuffer, "&field", 6 );
mpuric 0:a7bce9e88175 46 strncat(fieldBuffer, &fieldi , 1);
mpuric 0:a7bce9e88175 47 strncat(fieldBuffer, "=", 1);
mpuric 0:a7bce9e88175 48 strncat(fieldBuffer, fieldShortBuff , 6);
mpuric 0:a7bce9e88175 49 }
mpuric 0:a7bce9e88175 50
mpuric 0:a7bce9e88175 51 void ThingSpeak::putUp() {
mpuric 0:a7bce9e88175 52 sprintf(urlBuffer, "%s?key=%s%s", thingSpeakUrl, thingSpeakKey, fieldBuffer);
mpuric 0:a7bce9e88175 53 pc.printf("URL Buffer request: %s ", urlBuffer);
mpuric 0:a7bce9e88175 54 res = http.get(urlBuffer, &resp);
mpuric 0:a7bce9e88175 55 if (res == HTTP_OK)
mpuric 0:a7bce9e88175 56 pc.printf(" Result :\"%s\"\r\n", resp.gets());
mpuric 0:a7bce9e88175 57 else
mpuric 0:a7bce9e88175 58 pc.printf(" Error %d\r\n", res);
mpuric 0:a7bce9e88175 59 fieldBuffer[0] = 0;
mpuric 0:a7bce9e88175 60 }