Merge pull request #192 from brentru/add-esp32-esp32s2-example
Add usage example for ESP32 SSL/TLS
This commit is contained in:
Brent Rubell
GitHub
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/***********************************************************************
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Adafruit MQTT Library ESP32 Adafruit IO SSL/TLS example
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Use the latest version of the ESP32 Arduino Core:
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https://github.com/espressif/arduino-esp32
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Works great with Adafruit Huzzah32 Feather and Breakout Board:
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https://www.adafruit.com/product/3405
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https://www.adafruit.com/products/4172
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Adafruit invests time and resources providing this open source code,
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please support Adafruit and open-source hardware by purchasing
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products from Adafruit!
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Written by Tony DiCola for Adafruit Industries.
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Modified by Brent Rubell for Adafruit Industries
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MIT license, all text above must be included in any redistribution
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**********************************************************************/
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#include <WiFi.h>
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#include "WiFiClientSecure.h"
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#include "Adafruit_MQTT.h"
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#include "Adafruit_MQTT_Client.h"
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/************************* WiFi Access Point *********************************/
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#define WLAN_SSID "WLAN_SSID"
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#define WLAN_PASS "WIFI_PASSWORD"
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/************************* Adafruit.io Setup *********************************/
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#define AIO_SERVER "io.adafruit.com"
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// Using port 8883 for MQTTS
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#define AIO_SERVERPORT 8883
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// Adafruit IO Account Configuration
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// (to obtain these values, visit https://io.adafruit.com and click on Active Key)
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#define AIO_USERNAME "YOUR_ADAFRUIT_IO_USERNAME"
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#define AIO_KEY "YOUR_ADAFRUIT_IO_KEY"
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/************ Global State (you don't need to change this!) ******************/
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// WiFiFlientSecure for SSL/TLS support
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WiFiClientSecure client;
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// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.
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Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);
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// io.adafruit.com root CA
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const char* adafruitio_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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/****************************** Feeds ***************************************/
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// Setup a feed called 'test' for publishing.
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// Notice MQTT paths for AIO follow the form: <username>/feeds/<feedname>
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Adafruit_MQTT_Publish test = Adafruit_MQTT_Publish(&mqtt, AIO_USERNAME "/feeds/test");
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/*************************** Sketch Code ************************************/
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void setup() {
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Serial.begin(115200);
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delay(10);
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Serial.println(F("Adafruit IO MQTTS (SSL/TLS) Example"));
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// Connect to WiFi access point.
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Serial.println(); Serial.println();
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Serial.print("Connecting to ");
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Serial.println(WLAN_SSID);
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delay(1000);
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WiFi.begin(WLAN_SSID, WLAN_PASS);
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delay(2000);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println();
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Serial.println("WiFi connected");
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Serial.println("IP address: "); Serial.println(WiFi.localIP());
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// Set Adafruit IO's root CA
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client.setCACert(adafruitio_root_ca);
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}
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uint32_t x=0;
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void loop() {
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// Ensure the connection to the MQTT server is alive (this will make the first
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// connection and automatically reconnect when disconnected). See the MQTT_connect
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// function definition further below.
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MQTT_connect();
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// Now we can publish stuff!
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Serial.print(F("\nSending val "));
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Serial.print(x);
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Serial.print(F(" to test feed..."));
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if (! test.publish(x++)) {
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Serial.println(F("Failed"));
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} else {
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Serial.println(F("OK!"));
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}
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// wait a couple seconds to avoid rate limit
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delay(2000);
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}
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// Function to connect and reconnect as necessary to the MQTT server.
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// Should be called in the loop function and it will take care if connecting.
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void MQTT_connect() {
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int8_t ret;
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// Stop if already connected.
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if (mqtt.connected()) {
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return;
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}
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Serial.print("Connecting to MQTT... ");
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uint8_t retries = 3;
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while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
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Serial.println(mqtt.connectErrorString(ret));
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Serial.println("Retrying MQTT connection in 5 seconds...");
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mqtt.disconnect();
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delay(5000); // wait 5 seconds
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retries--;
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if (retries == 0) {
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// basically die and wait for WDT to reset me
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while (1);
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}
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}
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Serial.println("MQTT Connected!");
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}
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@ -1,5 +1,5 @@
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name=Adafruit MQTT Library
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version=2.1.0
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version=2.1.1
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author=Adafruit
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maintainer=Adafruit <info@adafruit.com>
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sentence=MQTT library that supports the FONA, ESP8266, Yun, and generic Arduino Client hardware.
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