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Wicked Jack
254
Code.txt
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254
Code.txt
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//-------------------------------------------------------------------------------
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//Libraries
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//-------------------------------------------------------------------------------
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#include <WiFi.h>
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#include <NTPClient.h>
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#include <WiFiClientSecure.h>
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#include <HTTPClient.h>
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#include <base64.h>
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//-------------------------------------------------------------------------------
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//Global variables
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//-------------------------------------------------------------------------------
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//-------------------------------------------------------------------------------
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// Debug mode? true = yes; false = no
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//-------------------------------------------------------------------------------
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const bool DEBUG = true;
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//-------------------------------------------------------------------------------
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// 1000 milliseconds = 1 second
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// 60 seconds = 1 minute
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// 60 minutes = 1 hour
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// 1000 * 60 * 60 = 3_600_000
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//-------------------------------------------------------------------------------
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// delay time in milliseconds (1h)
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//-------------------------------------------------------------------------------
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const unsigned long DELAY = 3600000;
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//-------------------------------------------------------------------------------
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// delay time for debugging in milliseconds (1s)
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//-------------------------------------------------------------------------------
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const unsigned long DEBUG_DELAY = 1000;
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//-------------------------------------------------------------------------------
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// value indicating gpio pin
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//-------------------------------------------------------------------------------
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const int GPIO34 = 34;
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//-------------------------------------------------------------------------------
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// ADC value
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//-------------------------------------------------------------------------------
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int iLuxResistorResolution = 10;
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float fLuxValue = 0.0;
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//-------------------------------------------------------------------------------
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// Wifi settings
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//-------------------------------------------------------------------------------
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const char* WIFI_SSID = ""; // Enter SSID here
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const char* WIFI_PASSWORD = ""; //Enter Password here
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int iElapsedConnectionTime = 0;
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//-------------------------------------------------------------------------------
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// Github settings
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//-------------------------------------------------------------------------------
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const char* GITHUB_ADDRESS = "api.github.com";
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const char* GITHUB_ROOT_CA = \
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"-----BEGIN CERTIFICATE-----\n" \
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"MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh\n" \
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"MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3\n" \
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"d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBD\n" \
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"QTAeFw0wNjExMTAwMDAwMDBaFw0zMTExMTAwMDAwMDBaMGExCzAJBgNVBAYTAlVT\n" \
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"MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5j\n" \
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"b20xIDAeBgNVBAMTF0RpZ2lDZXJ0IEdsb2JhbCBSb290IENBMIIBIjANBgkqhkiG\n" \
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"9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4jvhEXLeqKTTo1eqUKKPC3eQyaKl7hLOllsB\n" \
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"CSDMAZOnTjC3U/dDxGkAV53ijSLdhwZAAIEJzs4bg7/fzTtxRuLWZscFs3YnFo97\n" \
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"nh6Vfe63SKMI2tavegw5BmV/Sl0fvBf4q77uKNd0f3p4mVmFaG5cIzJLv07A6Fpt\n" \
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"43C/dxC//AH2hdmoRBBYMql1GNXRor5H4idq9Joz+EkIYIvUX7Q6hL+hqkpMfT7P\n" \
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"T19sdl6gSzeRntwi5m3OFBqOasv+zbMUZBfHWymeMr/y7vrTC0LUq7dBMtoM1O/4\n" \
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"gdW7jVg/tRvoSSiicNoxBN33shbyTApOB6jtSj1etX+jkMOvJwIDAQABo2MwYTAO\n" \
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"BgNVHQ8BAf8EBAMCAYYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUA95QNVbR\n" \
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"TLtm8KPiGxvDl7I90VUwHwYDVR0jBBgwFoAUA95QNVbRTLtm8KPiGxvDl7I90VUw\n" \
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"DQYJKoZIhvcNAQEFBQADggEBAMucN6pIExIK+t1EnE9SsPTfrgT1eXkIoyQY/Esr\n" \
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"hMAtudXH/vTBH1jLuG2cenTnmCmrEbXjcKChzUyImZOMkXDiqw8cvpOp/2PV5Adg\n" \
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"06O/nVsJ8dWO41P0jmP6P6fbtGbfYmbW0W5BjfIttep3Sp+dWOIrWcBAI+0tKIJF\n" \
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"PnlUkiaY4IBIqDfv8NZ5YBberOgOzW6sRBc4L0na4UU+Krk2U886UAb3LujEV0ls\n" \
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"YSEY1QSteDwsOoBrp+uvFRTp2InBuThs4pFsiv9kuXclVzDAGySj4dzp30d8tbQk\n" \
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"CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=\n" \
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"-----END CERTIFICATE-----\n";
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WiFiClientSecure* client;
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unsigned long ulGitHubCommitCounter = 0;
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String sGithubToken = "";
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String sGitHubUser = "";
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String sGitHubRepo = "";
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//-------------------------------------------------------------------------------
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//Data
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//-------------------------------------------------------------------------------
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String sData = "";
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//-------------------------------------------------------------------------------
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//Time
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//-------------------------------------------------------------------------------
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// Define NTP Client to get time
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WiFiUDP ntpUDP;
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NTPClient timeClient(ntpUDP);
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//-------------------------------------------------------------------------------
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//Initialization
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//-------------------------------------------------------------------------------
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void setup()
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{
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// Set baud rate to 115200
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Serial.begin(115200);
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delay(100);
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//connect to your local wi-fi network
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WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
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//connect to wi-fi network
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connectToWiFi();
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// Initialize a NTPClient to get time
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timeClient.begin();
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// Set offset time in seconds to adjust for your timezone, for example:
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// GMT +1 = 3600
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// GMT +8 = 28800
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// GMT -1 = -3600
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// GMT 0 = 0
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timeClient.setTimeOffset(3600);
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}
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//-------------------------------------------------------------------------------
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//Main loop
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//-------------------------------------------------------------------------------
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void loop()
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{
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//connect to wi-fi network
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connectToWiFi();
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// store actual time
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String sTime = getTimestamp();
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// Store value of gpio34 adc1_ch6
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int iADC1_6_Value = analogRead(GPIO34);
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fLuxValue = calculateLuxValue(iADC1_6_Value);
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// Build data string
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sData = "Value: " + String(fLuxValue) + " lux\nTime: " + sTime;
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Serial.println(sData);
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// send value with timestamp to github repo
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sendPUTRequest(fLuxValue, sTime);
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// sleep for value ulDelayTime (default: 1 hour) to save energy
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// avoiding busy wait
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delay(DELAY);
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}
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//-------------------------------------------------------------------------------
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//Functions
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//-------------------------------------------------------------------------------
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//-------------------------------------------------------------------------------
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// Connects to wifi
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void connectToWiFi()
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{
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//check wi-fi is connected to wi-fi network
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if (WiFi.status() != WL_CONNECTED)
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{
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Serial.println("WiFi disconnected..");
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Serial.println("Trying to reconnect..");
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while (WiFi.status() != WL_CONNECTED)
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{
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delay(1000);
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iElapsedConnectionTime++;
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Serial.println("Elapsed connection time: " + iElapsedConnectionTime);
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}
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iElapsedConnectionTime = 0;
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Serial.println("WiFi connected..!");
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Serial.print("Got IP: "); Serial.println(WiFi.localIP());
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}
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}
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//-------------------------------------------------------------------------------
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// Gets realtime from WiFi device via udp (specified at beginning)
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String getTimestamp()
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{
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while(!timeClient.update()) {
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timeClient.forceUpdate();
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}
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return timeClient.getFormattedTime();
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}
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//-------------------------------------------------------------------------------
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// Get percentage of ADC value and multiplicate it with one percent of 10 lux
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float calculateLuxValue(int iADC)
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{
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float fADC1Percent = ((float)4095) / 100;
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float fADCPercent = ((float)iADC) / fADC1Percent;
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float fLux1Percent = ((float)iLuxResistorResolution) / 100;
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return fADCPercent * fLux1Percent;
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}
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//-------------------------------------------------------------------------------
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void sendPUTRequest(float fLuxValue, String sTimestamp)
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{
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HTTPClient https;
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String sContent = "{\"timestamp\":\"" + sTimestamp + "\",\"value\":\"" + String(fLuxValue) + "\"}";
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String sEncodedFile = base64::encode(sContent);
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String sRequestBody = "{\"message\": \"Sensor data " + String(ulGitHubCommitCounter) + "\",\"content\" :\"" + sEncodedFile + "\"}";
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int iContentLength = sRequestBody.length();
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client = new WiFiClientSecure;
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client->setCACert(GITHUB_ROOT_CA);
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if (https.begin(*client, "https://api.github.com/repos/" + sGitHubUser + "/" + sGitHubRepo + "/contents/Measurement" + String(ulGitHubCommitCounter) + ".json"))
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{
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https.addHeader("Host", "api.github.com");
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https.addHeader("Content-Type", "application/json");
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https.addHeader("Authorization", ("Bearer " + sGithubToken));
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https.addHeader("Content-Length", String(iContentLength));
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// start connection and send HTTP header
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int httpCode = https.PUT(sRequestBody);
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// httpCode will be negative on error
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if (httpCode > 0)
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{
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Serial.println("PUT code: " + String(httpCode));
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if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_MOVED_PERMANENTLY)
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{
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String payload = https.getString();
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Serial.println(payload);
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}
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}
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else
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{
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Serial.println("PUT failed, error: " + https.errorToString(httpCode).c_str());
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}
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https.end();
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}
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else
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{
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Serial.println("Unable to connect to server");
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}
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ulGitHubCommitCounter++;
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}
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