162 lines
4.7 KiB
C++
162 lines
4.7 KiB
C++
/***************************************************
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Adafruit MQTT Library ESP8266 Adafruit IO SSL/TLS example
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Must use the latest version of ESP8266 Arduino from:
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https://github.com/esp8266/Arduino
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Works great with Adafruit's Huzzah ESP board & Feather
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----> https://www.adafruit.com/product/2471
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----> https://www.adafruit.com/products/2821
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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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SSL/TLS additions by Todd Treece 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 <ESP8266WiFi.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 "...your SSID..."
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#define WLAN_PASS "...your password..."
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/************************* Adafruit.io Setup *********************************/
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#define AIO_SERVER "io.adafruit.com"
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#define AIO_SERVERPORT 8883 // 8883 for MQTTS
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#define AIO_USERNAME "...your AIO username (see https://accounts.adafruit.com)..."
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#define AIO_KEY "...your AIO 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 SHA1 fingerprint. Current fingerprint can be verified via:
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// echo | openssl s_client -connect io.adafruit.com:443 |& openssl x509 -fingerprint -noout
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#define AIO_SSL_FINGERPRINT "77 00 54 2D DA E7 D8 03 27 31 23 99 EB 27 DB CB A5 4C 57 18"
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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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// Bug workaround for Arduino 1.6.6, it seems to need a function declaration
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// for some reason (only affects ESP8266, likely an arduino-builder bug).
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void MQTT_connect();
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void verifyFingerprint();
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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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// check the fingerprint of io.adafruit.com's SSL cert
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verifyFingerprint();
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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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void verifyFingerprint() {
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const char* host = AIO_SERVER;
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Serial.print("Connecting to ");
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Serial.println(host);
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if (! client.connect(host, AIO_SERVERPORT)) {
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Serial.println("Connection failed. Halting execution.");
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while(1);
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}
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if (client.verify(fingerprint, host)) {
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Serial.println("Connection secure.");
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} else {
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Serial.println("Connection insecure! Halting execution.");
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while(1);
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}
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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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