diff --git a/examples/adafruitio_secure_esp8266/adafruitio_secure_esp8266.ino b/examples/adafruitio_secure_esp8266/adafruitio_secure_esp8266.ino new file mode 100644 index 0000000..04fd06d --- /dev/null +++ b/examples/adafruitio_secure_esp8266/adafruitio_secure_esp8266.ino @@ -0,0 +1,164 @@ +/*************************************************** + Adafruit MQTT Library ESP8266 Adafruit IO SSL/TLS example + + Must use the latest version of ESP8266 Arduino from: + https://github.com/esp8266/Arduino + + Works great with Adafruit's Huzzah ESP board & Feather + ----> https://www.adafruit.com/product/2471 + ----> https://www.adafruit.com/products/2821 + + 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. + SSL/TLS additions by Todd Treece for Adafruit Industries. + MIT license, all text above must be included in any redistribution + ****************************************************/ +#include +#include "Adafruit_MQTT.h" +#include "Adafruit_MQTT_Client.h" + +/************************* WiFi Access Point *********************************/ + +#define WLAN_SSID "...your SSID..." +#define WLAN_PASS "...your password..." + +/************************* Adafruit.io Setup *********************************/ + +#define AIO_SERVER "io.adafruit.com" +#define AIO_SERVERPORT 8883 // 8883 for MQTTS +#define AIO_USERNAME "...your AIO username (see https://accounts.adafruit.com)..." +#define AIO_KEY "...your AIO key..." + +/************ Global State (you don't need to change this!) ******************/ + +// WiFiFlientSecure for SSL/TLS support +WiFiClientSecure client; + +// Store the MQTT server, username, and password in flash memory. +// This is required for using the Adafruit MQTT library. +const char MQTT_SERVER[] PROGMEM = AIO_SERVER; +const char MQTT_USERNAME[] PROGMEM = AIO_USERNAME; +const char MQTT_PASSWORD[] PROGMEM = AIO_KEY; + +// Setup the MQTT client class by passing in the WiFi client and MQTT server and login details. +Adafruit_MQTT_Client mqtt(&client, MQTT_SERVER, AIO_SERVERPORT, MQTT_USERNAME, MQTT_PASSWORD); + +// io.adafruit.com SHA1 fingerprint +const char* fingerprint = "26 96 1C 2A 51 07 FD 15 80 96 93 AE F7 32 CE B9 0D 01 55 C4"; + +/****************************** Feeds ***************************************/ + +// Setup a feed called 'photocell' for publishing. +// Notice MQTT paths for AIO follow the form: /feeds/ +const char TEST_FEED[] PROGMEM = AIO_USERNAME "/feeds/test"; +Adafruit_MQTT_Publish test = Adafruit_MQTT_Publish(&mqtt, TEST_FEED); + +/*************************** Sketch Code ************************************/ + +// Bug workaround for Arduino 1.6.6, it seems to need a function declaration +// for some reason (only affects ESP8266, likely an arduino-builder bug). +void MQTT_connect(); +void verifyFingerprint(); + +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()); + + // check the fingerprint of io.adafruit.com's SSL cert + verifyFingerprint(); + +} + +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!")); + } + +} + + +void verifyFingerprint() { + + const char* host = AIO_SERVER; + + Serial.print("Connecting to "); + Serial.println(host); + + if (! client.connect(host, AIO_SERVERPORT)) { + Serial.println("Connection failed. Halting execution."); + while(1); + } + + if (client.verify(fingerprint, host)) { + Serial.println("Connection secure."); + } else { + Serial.println("Connection insecure! Halting execution."); + while(1); + } + +} + +// 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!"); +}