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- #include <iostream>
- #include <sstream>
- #include <fstream>
- #include "network/SocketClient.h"
- #define ADC_PATH "/sys/bus/iio/devices/iio:device0/in_voltage"
- #define ADC 0
- using namespace std;
- using namespace exploringBB;
-
- float getTemperature(int adc_value) { // from the TMP36 datasheet
- float cur_voltage = adc_value * (1.80f/4096.0f); // Vcc = 1.8V, 12-bit
- float diff_degreesC = (cur_voltage-0.75f)/0.01f;
- return (25.0f + diff_degreesC);
- }
-
- int readAnalog(int number){
- stringstream ss;
- ss << ADC_PATH << number << "_raw";
- fstream fs;
- fs.open(ss.str().c_str(), fstream::in);
- fs >> number;
- fs.close();
- return number;
- }
-
- int main() {
- ostringstream head, data;
- cout << "Starting ThingSpeak Example" << endl;
- SocketClient sc("api.thingspeak.com",80);
- data << "field1=" << getTemperature(readAnalog(ADC)) << endl;
- cout << "Sending the temperature: " << getTemperature(readAnalog(ADC)) << endl;
- sc.connectToServer();
- head << "POST /update HTTP/1.1\n"
- << "Host: api.thingspeak.com\n"
- << "Connection: close\n"
- << "X-THINGSPEAKAPIKEY: 621LKPK58GD7PHSB\n"
- << "Content-Type: application/x-www-form-urlencoded\n"
- << "Content-Length:" << string(data.str()).length() << "\n\n";
- sc.send(string(head.str()));
- sc.send(string(data.str()));
- string rec = sc.receive(1024);
- cout << "[" << rec << "]" << endl;
- cout << "End of ThingSpeak Example" << endl;
- }
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