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- /***********************************************************************
- Adafruit MQTT Library ESP32 Adafruit IO SSL/TLS example
- Use the latest version of the ESP32 Arduino Core:
- https://github.com/espressif/arduino-esp32
- Works great with Adafruit Huzzah32 Feather and Breakout Board:
- https://www.adafruit.com/product/3405
- https://www.adafruit.com/products/4172
- Adafruit invests time and resources providing this open source code,
- please support Adafruit and open-source hardware by purchasing
- products from Adafruit!
- Written by Tony DiCola for Adafruit Industries.
- Modified by Brent Rubell for Adafruit Industries
- MIT license, all text above must be included in any redistribution
- **********************************************************************/
- #include <WiFi.h>
- #include "WiFiClientSecure.h"
- #include "Adafruit_MQTT.h"
- #include "Adafruit_MQTT_Client.h"
- /************************* WiFi Access Point *********************************/
- #define WLAN_SSID "WLAN_SSID"
- #define WLAN_PASS "WIFI_PASSWORD"
- /************************* Adafruit.io Setup *********************************/
- #define AIO_SERVER "io.adafruit.com"
- // Using port 8883 for MQTTS
- #define AIO_SERVERPORT 8883
- // Adafruit IO Account Configuration
- // (to obtain these values, visit https://io.adafruit.com and click on Active Key)
- #define AIO_USERNAME "YOUR_ADAFRUIT_IO_USERNAME"
- #define AIO_KEY "YOUR_ADAFRUIT_IO_KEY"
- /************ Global State (you don't need to change this!) ******************/
- // WiFiFlientSecure for SSL/TLS support
- WiFiClientSecure client;
- // Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
- Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);
- // io.adafruit.com root CA
- const char* adafruitio_root_ca = \
- "-----BEGIN CERTIFICATE-----\n" \
- "MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh\n" \
- "MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3\n" \
- "d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBD\n" \
- "QTAeFw0wNjExMTAwMDAwMDBaFw0zMTExMTAwMDAwMDBaMGExCzAJBgNVBAYTAlVT\n" \
- "MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5j\n" \
- "b20xIDAeBgNVBAMTF0RpZ2lDZXJ0IEdsb2JhbCBSb290IENBMIIBIjANBgkqhkiG\n" \
- "9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4jvhEXLeqKTTo1eqUKKPC3eQyaKl7hLOllsB\n" \
- "CSDMAZOnTjC3U/dDxGkAV53ijSLdhwZAAIEJzs4bg7/fzTtxRuLWZscFs3YnFo97\n" \
- "nh6Vfe63SKMI2tavegw5BmV/Sl0fvBf4q77uKNd0f3p4mVmFaG5cIzJLv07A6Fpt\n" \
- "43C/dxC//AH2hdmoRBBYMql1GNXRor5H4idq9Joz+EkIYIvUX7Q6hL+hqkpMfT7P\n" \
- "T19sdl6gSzeRntwi5m3OFBqOasv+zbMUZBfHWymeMr/y7vrTC0LUq7dBMtoM1O/4\n" \
- "gdW7jVg/tRvoSSiicNoxBN33shbyTApOB6jtSj1etX+jkMOvJwIDAQABo2MwYTAO\n" \
- "BgNVHQ8BAf8EBAMCAYYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUA95QNVbR\n" \
- "TLtm8KPiGxvDl7I90VUwHwYDVR0jBBgwFoAUA95QNVbRTLtm8KPiGxvDl7I90VUw\n" \
- "DQYJKoZIhvcNAQEFBQADggEBAMucN6pIExIK+t1EnE9SsPTfrgT1eXkIoyQY/Esr\n" \
- "hMAtudXH/vTBH1jLuG2cenTnmCmrEbXjcKChzUyImZOMkXDiqw8cvpOp/2PV5Adg\n" \
- "06O/nVsJ8dWO41P0jmP6P6fbtGbfYmbW0W5BjfIttep3Sp+dWOIrWcBAI+0tKIJF\n" \
- "PnlUkiaY4IBIqDfv8NZ5YBberOgOzW6sRBc4L0na4UU+Krk2U886UAb3LujEV0ls\n" \
- "YSEY1QSteDwsOoBrp+uvFRTp2InBuThs4pFsiv9kuXclVzDAGySj4dzp30d8tbQk\n" \
- "CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=\n" \
- "-----END CERTIFICATE-----\n";
- /****************************** Feeds ***************************************/
- // Setup a feed called 'test' for publishing.
- // Notice MQTT paths for AIO follow the form: <username>/feeds/<feedname>
- Adafruit_MQTT_Publish test = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/test");
- /*************************** Sketch Code ************************************/
- void setup() {
- Serial.begin(115200);
- delay(10);
- Serial.println(F("Adafruit IO MQTTS (SSL/TLS) Example"));
- // Connect to WiFi access point.
- Serial.println(); Serial.println();
- Serial.print("Connecting to ");
- Serial.println(WLAN_SSID);
- delay(1000);
- WiFi.begin(WLAN_SSID, WLAN_PASS);
- delay(2000);
- while (WiFi.status() != WL_CONNECTED) {
- delay(500);
- Serial.print(".");
- }
- Serial.println();
- Serial.println("WiFi connected");
- Serial.println("IP address: "); Serial.println(WiFi.localIP());
- // Set Adafruit IO's root CA
- client.setCACert(adafruitio_root_ca);
- }
- uint32_t x=0;
- void loop() {
- // Ensure the connection to the MQTT server is alive (this will make the first
- // connection and automatically reconnect when disconnected). See the MQTT_connect
- // function definition further below.
- MQTT_connect();
- // Now we can publish stuff!
- Serial.print(F("\nSending val "));
- Serial.print(x);
- Serial.print(F(" to test feed..."));
- if (! test.publish(x++)) {
- Serial.println(F("Failed"));
- } else {
- Serial.println(F("OK!"));
- }
- // wait a couple seconds to avoid rate limit
- delay(2000);
- }
- // Function to connect and reconnect as necessary to the MQTT server.
- // Should be called in the loop function and it will take care if connecting.
- void MQTT_connect() {
- int8_t ret;
- // Stop if already connected.
- if (mqtt.connected()) {
- return;
- }
- Serial.print("Connecting to MQTT... ");
- uint8_t retries = 3;
- while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
- Serial.println(mqtt.connectErrorString(ret));
- Serial.println("Retrying MQTT connection in 5 seconds...");
- mqtt.disconnect();
- delay(5000); // wait 5 seconds
- retries--;
- if (retries == 0) {
- // basically die and wait for WDT to reset me
- while (1);
- }
- }
- Serial.println("MQTT Connected!");
- }
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