Repurposed Adafruit example
This commit is contained in:
Stuart Feichtinger
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1b885c7fb5
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2fc3db20c7
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@ -1,5 +1,5 @@
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/***************************************************
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Adafruit MQTT Library ESP8266 Example
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Adafruit MQTT Library Arbitrary Packet Example
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Must use ESP8266 Arduino from:
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https://github.com/esp8266/Arduino
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@ -26,10 +26,11 @@
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/************************* Adafruit.io Setup *********************************/
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#define AIO_SERVER "io.adafruit.com"
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#define AIO_SERVERPORT 1883 // use 8883 for SSL
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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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#define ARB_SERVER "...host computer ip address..."
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#define ARB_SERVERPORT 1883 // use 8883 for SSL
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#define ARB_USERNAME "testUser"
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#define ARB_PW "testPassword"
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/************ Global State (you don't need to change this!) ******************/
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@ -40,40 +41,54 @@ WiFiClient client;
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// Store the MQTT server, username, and password in flash memory.
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// This is required for using the Adafruit MQTT library.
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const char MQTT_SERVER[] PROGMEM = AIO_SERVER;
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const char MQTT_USERNAME[] PROGMEM = AIO_USERNAME;
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const char MQTT_PASSWORD[] PROGMEM = AIO_KEY;
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const char MQTT_SERVER[] PROGMEM = ARB_SERVER;
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const char MQTT_USERNAME[] PROGMEM = ARB_USERNAME;
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const char MQTT_PASSWORD[] PROGMEM = ARB_PW;
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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, MQTT_SERVER, AIO_SERVERPORT, MQTT_USERNAME, MQTT_PASSWORD);
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Adafruit_MQTT_Client mqtt(&client, MQTT_SERVER, ARB_SERVERPORT, MQTT_USERNAME, MQTT_PASSWORD);
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/****************************** Feeds ***************************************/
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// Setup a feed called 'photocell' for publishing.
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// Setup a feed called 'arb_packet' for publishing.
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// Notice MQTT paths for AIO follow the form: <username>/feeds/<feedname>
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const char PHOTOCELL_FEED[] PROGMEM = AIO_USERNAME "/feeds/photocell";
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Adafruit_MQTT_Publish photocell = Adafruit_MQTT_Publish(&mqtt, PHOTOCELL_FEED);
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// Setup a feed called 'onoff' for subscribing to changes.
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const char ONOFF_FEED[] PROGMEM = AIO_USERNAME "/feeds/onoff";
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Adafruit_MQTT_Subscribe onoffbutton = Adafruit_MQTT_Subscribe(&mqtt, ONOFF_FEED);
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const char ARB_FEED[] PROGMEM = "/feeds/arb_packet";
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Adafruit_MQTT_Publish ap = Adafruit_MQTT_Publish(&mqtt, ARB_FEED);
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// Arbitrary Payload
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// Union allows for easier interaction of members in struct form with easy publishing
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// of "raw" bytes
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typedef union{
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//Customize struct with whatever variables/types you like.
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struct __attribute__((__packed__)){ // packed to eliminate padding for easier parsing.
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char charAry[10];
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int16_t val1;
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unsigned long val2;
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uint16_t val3;
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}s;
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}s;
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uint8_t raw[sizeof(s)]; // For publishing
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} packet_t;
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/*
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// Alternate Option with anonymous struct, but manual byte count:
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struct __attribute__((__packed__)){ // packed to eliminate padding for easier parsing.
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char charAry[10]; // 10 x 1 byte = 10 bytes
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int16_t val1; // 1 x 2 bytes = 2 bytes
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unsigned long val2; // 1 x 4 bytes = 4 bytes
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uint16_t val3; // 1 x 2 bytes = 2 bytes
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-------------------
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TOTAL = 18 bytes
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};
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uint8_t raw[18]; // For publishing
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} packet_t;
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/*
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/*************************** Sketch Code ************************************/
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@ -102,11 +117,11 @@ void setup() {
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Serial.println(F("WiFi connected"));
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Serial.println(F("IP address: ")); Serial.println(WiFi.localIP());
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// Setup MQTT subscription for onoff feed.
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mqtt.subscribe(&onoffbutton);
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}
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uint32_t x=0;
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packet_t arbPac;
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const char strVal[] PROGMEM = "Hello!";
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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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@ -114,26 +129,30 @@ void loop() {
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// function definition further below.
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MQTT_connect();
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// this is our 'wait for incoming subscription packets' busy subloop
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// try to spend your time here
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//Update arbitrary packet values
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strcpy_P(arbPac.s.charAry, strVal);
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arbPac.s.val1 = -4533;
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arbPac.s.val2 = millis();
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arbPac.s.val3 = 3354;
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Adafruit_MQTT_Subscribe *subscription;
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while ((subscription = mqtt.readSubscription(5000))) {
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if (subscription == &onoffbutton) {
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Serial.println(F("Got: "));
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Serial.println((char *)onoffbutton.lastread);
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}
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}
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/*
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// Alternate Union with anonymous struct
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strcpy_P(arbPac.charAry, strVal);
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arbPac.val1 = -4533;
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arbPac.val2 = millis();
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arbPac.val3 = 3354;
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*/
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if (! ap.publish(arbPac.raw, sizeof(packet_t)))
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Serial.println(F("Publish Failed."));
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else {
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Serial.println(F("Publish Success!"));
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delay(500);
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}
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delay(10000);
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// Now we can publish stuff!
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Serial.print(F("\nSending photocell val "));
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Serial.print(x);
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Serial.print(F("..."));
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if (! photocell.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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// ping the server to keep the mqtt connection alive
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// NOT required if you are publishing once every KEEPALIVE seconds
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