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@tdnvl tdnvl/iot-plant.ino
Created Jun 29, 2017

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/*
* Project: IoT Plant
* Description: A moisture sensor reads the moisture in the flower pot. If it's too dry, it tweets.
* Author: @tdnvl
* Date: 2017-05-20
*/
int moisturePin = A0;
int led1 = D7;
int tweeted = 0;
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
pinMode(led1, OUTPUT);
pinMode(moisturePin, INPUT);
}
void loop() {
int moisturePin = analogRead(A0);
// Serial.println(moisturePin);
if (moisturePin < 1000 && tweeted == 0) {
// Generic copy for the tweet
String data = "Hey, @tdnvl! I need some water! #";
// Twitter won't post identical tweets. I generate a random integer between 1 and 30 and append it.
data += random(30);
// Trigger the integration
Particle.publish("tweet", data, PRIVATE);
// Set tweeted variable to 1
tweeted = 1;
// Wait 60 seconds
delay(60000);
}
else if (moisturePin < 1000 && tweeted != 0){
// Let's blink the D7 LED, in case I missed the tweet
digitalWrite(led1, HIGH);
delay(1000);
digitalWrite(led1, LOW);
delay(1000);
}
else {
// Moisture is OK, let's set the tweeted variable to 0
tweeted = 0;
// Let's wait for another 10 minutes before reading A0 again
delay(600000);
}
}
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