ESP32AzureRequest.ino

/**
* ©2018 by Daniel Eichhorn - ThingPulse (https://thingpulse.com)
*/

#include <WiFi.h>
#include <HTTPClient.h>

#define IOT_HUB_NAME "IOT HUB NAME"
#define DEVICE_NAME "DEVICE NAME"
#define SAS_TOKEN "SAS TOKEN"

const char* ssid     = "yourssid";     // your network SSID (name of wifi network)
const char* password = "yourpassword"; // your network password

// Created with openssl s_client -showcerts -connect thingpulse.azure-devices.net:443
// and by picking the root certificate
const char* root_ca= \
     "-----BEGIN CERTIFICATE-----\n" \
     "MIIFtDCCBJygAwIBAgIQCLh6UBu+nNotFk0+OVG/VTANBgkqhkiG9w0BAQsFADBa\n" \
     "MQswCQYDVQQGEwJJRTESMBAGA1UEChMJQmFsdGltb3JlMRMwEQYDVQQLEwpDeWJl\n" \
     "clRydXN0MSIwIAYDVQQDExlCYWx0aW1vcmUgQ3liZXJUcnVzdCBSb290MB4XDTE2\n" \
     "MDUyMDEyNTEyOFoXDTI0MDUyMDEyNTEyOFowgYsxCzAJBgNVBAYTAlVTMRMwEQYD\n" \
     "VQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdSZWRtb25kMR4wHAYDVQQKExVNaWNy\n" \
     "b3NvZnQgQ29ycG9yYXRpb24xFTATBgNVBAsTDE1pY3Jvc29mdCBJVDEeMBwGA1UE\n" \
     "AxMVTWljcm9zb2Z0IElUIFRMUyBDQSAxMIICIjANBgkqhkiG9w0BAQEFAAOCAg8A\n" \
     "MIICCgKCAgEAjvPxhHV3vL7JpPUWpVMrUGCZ3Nh92SS14XJJN0j+2oaTo30dmksQ\n" \
     "TXd5fmWpfG424kfUNknQzCQCJxTirnHN2Vd0PBBWGZJKh2L545CNXt7RQRsaph9A\n" \
     "oiwejlXXJthoQqvsDd7dXmGVs6xsgc6o4K2vX8qm5FFoLif9VCpxpMy7fpLx9lNR\n" \
     "BTHQGYKwymPQ8koAC830aUv0WpZWOSbJnUsKYzQygKUE5eoot8EAwG0a8CjUSo+A\n" \
     "rHMZ2PUWL62uCJdiBiz+56XwrUFTf40rMcMUcyHd43hjnFGGtaJIScB5CBVDACuZ\n" \
     "uEvgx1cHbMS5plQtAVPyo/KkzNnBVPOIzeRME9OKMyFYrRi/vjmBcDlpN/hbpGPv\n" \
     "CQffhxpix5oIxdEdXmJ2Ad1p5ji7RLAtTTrGLoDgYHJb8szmjlw6IR5dsDkrveoT\n" \
     "y5bLtmp0jI68DhCfG6VAQY+RXHanDvGqOoe3DHffcWovKGFCLZAPcgWrZ+DBe8uc\n" \
     "QJrECghEjHw9uqkOHrHZIr0fX0Fqc1T2ZuKg+aY53tJ382kEv7e7PMST/3IEHLU2\n" \
     "nWh/3/o5T7L2j7kc/63tDhUI44Z88khJd5cW9v0A9k+mXm/nOcBRZT3rsZcw7Oqe\n" \
     "c/weLKDfi89zX7UOBkIXJpXs2Kkn0NBllFziP8ooKaUg9MjdXbT/5t0CAwEAAaOC\n" \
     "AUIwggE+MB0GA1UdDgQWBBRYiJ/W3JxIIrcUPv+EiOjmhf/6fTAfBgNVHSMEGDAW\n" \
     "gBTlnVkwgkdYzKz6CFQ2hns6tQRN8DASBgNVHRMBAf8ECDAGAQH/AgEAMA4GA1Ud\n" \
     "DwEB/wQEAwIBhjAnBgNVHSUEIDAeBggrBgEFBQcDAQYIKwYBBQUHAwIGCCsGAQUF\n" \
     "BwMJMDQGCCsGAQUFBwEBBCgwJjAkBggrBgEFBQcwAYYYaHR0cDovL29jc3AuZGln\n" \
     "aWNlcnQuY29tMDoGA1UdHwQzMDEwL6AtoCuGKWh0dHA6Ly9jcmwzLmRpZ2ljZXJ0\n" \
     "LmNvbS9PbW5pcm9vdDIwMjUuY3JsMD0GA1UdIAQ2MDQwMgYEVR0gADAqMCgGCCsG\n" \
     "AQUFBwIBFhxodHRwczovL3d3dy5kaWdpY2VydC5jb20vQ1BTMA0GCSqGSIb3DQEB\n" \
     "CwUAA4IBAQAwmsadav3vkwgMvoJ3+XagbZ57MCN7qCla9Go+xwsMlt+4S1LkDZw4\n" \
     "7XhjtXPAHB874Kf/f0lRlTK40Jup5c+WA4GA1UphGP7Easbff0FGIpyAZusPQqDk\n" \
     "86Qho5jQenT2jOjD0iuqK84RWRlE51wHCULr1/0VTblvbEQ1Joe6oztosIHnIMl/\n" \
     "EwLzzKufHJVQy65kgLuHCl3OpmuyfeM9NuIpUbcl/NAJ47CtxGIuPn6FJrL2r/dt\n" \
     "MXPGGZipcpMCzsoLPTzs2XDogPUWq3hqh03GgTeoCnaBBqjvF2B8cBATPDjXM0zk\n" \
     "N2UI+5Gz6BZ2YSpl9ViUs0UB78BPA3u4\n" \
     "-----END CERTIFICATE-----\n";

WiFiClientSecure client;

void sendRequest(String iothubName, String deviceName, String sasToken, String message) {
  if ((WiFi.status() == WL_CONNECTED)) { //Check the current connection status

    HTTPClient http;
    String url = "https://" + iothubName + ".azure-devices.net/devices/" + deviceName + "/messages/events?api-version=2016-11-14";
    http.begin(url, root_ca); //Specify the URL and certificate
    http.addHeader("Authorization", sasToken);
    http.addHeader("Content-Type", "application/json");
    int httpCode = http.POST(message);

    if (httpCode > 0) { //Check for the returning code

        String payload = http.getString();
        Serial.println(httpCode);
        Serial.println(payload);
      }

    else {
      Serial.println("Error on HTTP request");
    }

    http.end(); //Free the resources
  }

}

void setup() {
  Serial.begin(115200);
  delay(100);

  Serial.print("Attempting to connect to SSID: ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(1000);
  }

}

void loop() {
  sendRequest(IOT_HUB_NAME, DEVICE_NAME, SAS_TOKEN, "{temperature: 24.5}");
  delay(10000);
}