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