Uploading sensor data (voltage divider, MAX4172, INA219) over Ethernet to Thing Speak service. Uses old mbed revision that is compatible with NetServices library. I2C communication is made with I2CR library.

Dependencies:   C12832 I2CR INA219 NetServices mbed

Fork of NetServices_HelloWorld by Segundo Equipo

Revision:
6:ebbde59c5a1d
Child:
7:1da0a084cd69
diff -r 1e77bdd1a639 -r ebbde59c5a1d ThingSpeak.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ThingSpeak.cpp	Fri Nov 20 08:28:11 2015 +0000
@@ -0,0 +1,48 @@
+#include "mbed.h"
+#include "EthernetNetIf.h"
+#include "HTTPClient.h"
+#include "ThingSpeak.h"
+
+Serial pc(USBTX, USBRX);
+
+ThingSpeak::ThingSpeak(char* Key, const int Qt) : thingSpeakKey(Key) {      
+    thingSpeakUrl = "https://api.thingspeak.com/update";
+    urlBuffer[0] = 0;
+    fieldBuffer[0] = 0;
+}
+
+void ThingSpeak::connect() {
+    pc.printf("Setting up Ethernet...\r\n");
+    EthernetErr ethErr = eth.setup();
+    if(ethErr){
+        pc.printf("Error %d in ethernet setup.\r\n", ethErr);  
+       //* connect();
+        }
+    pc.printf("Ethernet setup OK\r\n");
+}
+
+void ThingSpeak::getIP() {
+   
+}
+
+void ThingSpeak::setField(float field, int i) {
+    char fieldi;
+    char fieldShortBuff[8];
+    sprintf(fieldShortBuff, "%f", field);
+    sprintf(&fieldi, "%i", i);
+    strncat(fieldBuffer, "&field", 6 );
+    strncat(fieldBuffer, &fieldi , 1);
+    strncat(fieldBuffer, "=", 1);
+    strncat(fieldBuffer, fieldShortBuff , 4);    
+}
+
+void ThingSpeak::putUp() {
+    sprintf(urlBuffer, "%s?key=%s%s", thingSpeakUrl, thingSpeakKey, fieldBuffer);
+    pc.printf("URL Buffer request: %s ", urlBuffer); 
+    res = http.get(urlBuffer, &resp);
+    if (res == HTTP_OK)
+        pc.printf(" Result :\"%s\"\r\n", resp.gets());
+    else
+        pc.printf(" Error %d\r\n", res); 
+    fieldBuffer[0] = 0;         
+}
\ No newline at end of file