Created
September 26, 2013 22:38
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Arduino sketch for reading MaKey MaKey digital output pins and sending them via MQTT.
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#include <SPI.h> | |
#include <PubSubClient.h> | |
#include <WiFi.h> | |
#include <Timer.h> | |
#define M2MIO_USERNAME "<2lemetry platform username>" | |
#define M2MIO_PASSWORD "<MD5 hash of 2lemetry password>" | |
#define M2MIO_DOMAIN "<domain on 2lemetry platform>" | |
#define M2MIO_STUFF "arduino" | |
#define M2MIO_DEVICE_ID "teslamqtt" | |
#define MQTT_SERVER "q.m2m.io" | |
char ssid[] = "<myssid>"; // network SSID (name) | |
char pass[] = "<mynetworkpassphrase>"; // network passphrase | |
int status = WL_IDLE_STATUS; // the Wifi radio's status | |
WiFiClient wifiClient; | |
PubSubClient mmClient(MQTT_SERVER, 1883, mmCallback, wifiClient); | |
char clientID[50]; | |
char topic[50]; | |
char msg[50]; | |
#define PROCESSING_INTERVAL 600 | |
Timer t; | |
int kbPin = 3; | |
int clPin = 4; | |
int kbVal = 0; | |
int clVal = 0; | |
/* | |
* SETUP | |
* | |
*/ | |
void setup() | |
{ | |
// init serial link for debugging | |
Serial.begin(9600); | |
pinMode(kbPin, INPUT); | |
pinMode(clPin, INPUT); | |
// connect to WiFi access point | |
Serial.print("Attempting to connect to WiFi..."); | |
status = WiFi.begin(ssid, pass); | |
// if you're not connected, stop here: | |
if ( status != WL_CONNECTED) { | |
Serial.print("ERROR: couldn't get a wifi connection."); | |
while(true); | |
} | |
else { | |
Serial.print("connected."); | |
} | |
Serial.println(); | |
String clientIDStr = M2MIO_DEVICE_ID; | |
clientIDStr.toCharArray(clientID, clientIDStr.length()+1); | |
Serial.println(clientIDStr); | |
mmClient.connect(clientID, M2MIO_USERNAME, M2MIO_PASSWORD); | |
String topicStr = M2MIO_DOMAIN; | |
topicStr.concat("/"); | |
topicStr.concat(M2MIO_STUFF); | |
topicStr.concat("/"); | |
topicStr.concat(M2MIO_DEVICE_ID); | |
topicStr.toCharArray(topic, topicStr.length()+1); | |
Serial.println(topicStr); | |
// setup timer | |
int flowEvent = t.every(PROCESSING_INTERVAL, readPins); | |
} | |
/* | |
* LOOP | |
* | |
*/ | |
void loop() | |
{ | |
t.update(); | |
mmClient.loop(); | |
} | |
void readPins() { | |
if (mmClient.connected()) { | |
//Serial.println("C"); | |
} else { | |
Serial.println("NC"); | |
Serial.println("Client Connecting..."); | |
mmClient.connect(clientID, M2MIO_USERNAME, M2MIO_PASSWORD); | |
} | |
kbVal = digitalRead(kbPin); | |
clVal = digitalRead(clPin); | |
if (kbVal == HIGH || clVal == HIGH) { | |
String mmMsg = "{\"button\":\""; | |
if (kbVal == HIGH) { | |
mmMsg.concat("kb\"}"); | |
} else if (clVal == HIGH) { | |
mmMsg.concat("cl\"}"); | |
} else { | |
mmMsg.concat("na\"}"); | |
} | |
Serial.println(mmMsg); | |
mmMsg.toCharArray(msg, mmMsg.length()+1); | |
mmClient.publish(topic, msg); | |
} | |
} | |
/* | |
* Message Received Callback | |
* | |
*/ | |
void mmCallback(char* topic, byte* payload, unsigned int length) { } |
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