Create WifiClientSecure_Enterprise.ino

WifiClientSecure_Enterprise.ino

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+/*|----------------------------------------------------------|*/
+/*|AckSensors ENTERPRISE connection                          |*/
+/*|EMAIL: martinius96@gmail.com                              |*/
+/*|NOT TESTED OFFICIALY YET                                  |*/
+/*|CORE: June 2018                                           |*/
+/*|----------------------------------------------------------|*/
+#include <WiFi.h>
+#include "esp_wpa2.h" //wpa2 library for connections to Enterprise networks
+#include <WiFiClientSecure.h>
+const char* host = "asksensors.com";
+//-------- Customise these values -----------
+const char* ssid = "eduroam";
+#define EAP_ANONYMOUS_IDENTITY "anonymous@example.com"
+#define EAP_IDENTITY "nickname@example.com"
+#define EAP_PASSWORD "password"
+String apiKeyIn = "XXXX"; // API Key
+//-------- END Customise these values -----------
+int counter = 0;  
+const char* cert = \
+    "-----BEGIN CERTIFICATE-----\n" \
+    "MIIDSjCCAjKgAwIBAgIQRK+wgNajJ7qJMDmGLvhAazANBgkqhkiG9w0BAQUFADA/\n" \
+    "MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT\n" \
+    "DkRTVCBSb290IENBIFgzMB4XDTAwMDkzMDIxMTIxOVoXDTIxMDkzMDE0MDExNVow\n" \
+    "PzEkMCIGA1UEChMbRGlnaXRhbCBTaWduYXR1cmUgVHJ1c3QgQ28uMRcwFQYDVQQD\n" \
+    "Ew5EU1QgUm9vdCBDQSBYMzCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB\n" \
+    "AN+v6ZdQCINXtMxiZfaQguzH0yxrMMpb7NnDfcdAwRgUi+DoM3ZJKuM/IUmTrE4O\n" \
+    "rz5Iy2Xu/NMhD2XSKtkyj4zl93ewEnu1lcCJo6m67XMuegwGMoOifooUMM0RoOEq\n" \
+    "OLl5CjH9UL2AZd+3UWODyOKIYepLYYHsUmu5ouJLGiifSKOeDNoJjj4XLh7dIN9b\n" \
+    "xiqKqy69cK3FCxolkHRyxXtqqzTWMIn/5WgTe1QLyNau7Fqckh49ZLOMxt+/yUFw\n" \
+    "7BZy1SbsOFU5Q9D8/RhcQPGX69Wam40dutolucbY38EVAjqr2m7xPi71XAicPNaD\n" \
+    "aeQQmxkqtilX4+U9m5/wAl0CAwEAAaNCMEAwDwYDVR0TAQH/BAUwAwEB/zAOBgNV\n" \
+    "HQ8BAf8EBAMCAQYwHQYDVR0OBBYEFMSnsaR7LHH62+FLkHX/xBVghYkQMA0GCSqG\n" \
+    "SIb3DQEBBQUAA4IBAQCjGiybFwBcqR7uKGY3Or+Dxz9LwwmglSBd49lZRNI+DT69\n" \
+    "ikugdB/OEIKcdBodfpga3csTS7MgROSR6cz8faXbauX+5v3gTt23ADq1cEmv8uXr\n" \
+    "AvHRAosZy5Q6XkjEGB5YGV8eAlrwDPGxrancWYaLbumR9YbK+rlmM6pZW87ipxZz\n" \
+    "R8srzJmwN0jP41ZL9c8PDHIyh8bwRLtTcm1D9SZImlJnt1ir/md2cXjbDaJWFBM5\n" \
+    "JDGFoqgCWjBH4d1QB7wCCZAA62RjYJsWvIjJEubSfZGL+T0yjWW06XyxV3bqxbYo\n" \
+    "Ob8VZRzI9neWagqNdwvYkQsEjgfbKbYK7p2CNTUQ\n" \
+    "-----END CERTIFICATE-----\n";
+WiFiClientSecure client;    
+void setup(){  
+    // open serial
+    Serial.begin(9600);
+    Serial.println("*****************************************************");
+    Serial.println("********** Program Start : Connect ESP32 to AskSensors.");
+    Serial.println("Wait for WiFi... ");
+    esp_wifi_sta_wpa2_ent_set_identity((uint8_t *)EAP_ANONYMOUS_IDENTITY, strlen(EAP_ANONYMOUS_IDENTITY)); 
+    esp_wifi_sta_wpa2_ent_set_username((uint8_t *)EAP_IDENTITY, strlen(EAP_IDENTITY));
+    esp_wifi_sta_wpa2_ent_set_password((uint8_t *)EAP_PASSWORD, strlen(EAP_PASSWORD));
+    esp_wpa2_config_t config = WPA2_CONFIG_INIT_DEFAULT(); //set config settings to default
+    esp_wifi_sta_wpa2_ent_enable(&config); //set config settings to enable function
+    WiFi.disconnect(true);  //disconnect form wifi to set new wifi connection
+    WiFi.mode(WIFI_STA); //init wifi mode
+    WiFi.begin(ssid); //connect to wifi
+    while (WiFi.status() != WL_CONNECTED) {
+        delay(500);
+        Serial.print(".");
+        counter++;
+        if(counter>=60){ //after 30 seconds timeout - reset board
+          ESP.restart();
+        }
+    }
+    client.setCACert(cert);
+  // connected
+    Serial.println("WiFi connected");
+    Serial.println("IP address: ");
+    Serial.println(WiFi.localIP());
+}
+
+void loop(){
+    if (WiFi.status() == WL_CONNECTED) { //if we are connected to Eduroam network
+      counter = 0; //reset counter
+      Serial.println("Wifi is still connected with IP: "); 
+      Serial.println(WiFi.localIP());   //inform user about his IP address
+    }else if (WiFi.status() != WL_CONNECTED) { //if we lost connection, retry
+      WiFi.begin(ssid);      
+    }
+    while (WiFi.status() != WL_CONNECTED) { //during lost connection, print dots
+      delay(500);
+      Serial.print(".");
+      counter++;
+      if(counter>=60){ //30 seconds timeout - reset board
+        ESP.restart();
+      }
+    }
+    if (client.connect(host, 443)) {
+      String url = "/api.asksensors/write/";
+      url += apiKeyIn;
+      url += "?module1=";
+      url += random(10, 100);    
+      client.print(String("GET ") + url + " HTTP/1.1\r\n" + "Host: " + host + "\r\n" + "User-Agent: ESP32\r\n" + "Connection: close\r\n\r\n");
+      while (client.connected()) {
+        String line = client.readStringUntil('\n');
+        //Serial.println(line); ---> uncomment for see header
+        if (line == "\r") {
+          break;
+        }
+      }
+      String line = client.readStringUntil('\n');
+      Serial.println(line);
+    }else{
+      Serial.println("Connection unsucessful");
+    }  
+    delay(20000);    // delay
+}