Upload the following code to your FLORA, ensuring you have the UV index sensor library installed properly (you should if you tested your sensor in the last step). This code is suited well for testing your complete circuit indoors, near a window. The UV index threshold is set very low (0.05, achievable by pointing it towards an open window), with a reminder interval of ten seconds. You can also open up serial monitor while it's running to check out the readings and timer.
/***************************************************
Sunscreen reminder hat using the Si1145 UV/IR/Visible Light Sensor
visit https://learn.adafruit.com/sunscreen-reminder-hat for full tutorial
contains Super Mario Bros theme composed for piezo by Tiago Gala: http://therandombit.wordpress.com/2011/11/21/arduino-piezo-speaker-super-mario/
Written by Becky Stern for Adafruit Industries.
BSD license, all text above must be included in any redistribution
****************************************************/
#include <Wire.h>
#include "Adafruit_SI1145.h"
Adafruit_SI1145 uv = Adafruit_SI1145();
//tones for reminder tune
#define toneC 1911
#define toneC1 1804
#define toneD 1703
#define toneEb 1607
#define toneE 1517
#define toneF 1432
#define toneF1 1352
#define toneG 1276
#define toneAb 1204
#define toneA 1136
#define toneBb 1073
#define toneB 1012
#define tonec 955
#define tonec1 902
#define toned 851
#define toneeb 803
#define tonee 758
#define tonef 716
#define tonef1 676
#define toneg 638
#define toneab 602
#define tonea 568
#define tonebb 536
#define toneb 506
#define tonep 0
int speaker = 1; // piezo wired to FLORA TX
uint32_t sinceTime;
uint32_t markerTime;
boolean shouldChime = false;
float UVindex;
float UVthreshold = 0.05;
uint32_t reapplyInterval = 10000; // 15 minutes = 900000 milliseconds. One hour = 3600000 milliseconds. Two hours = 7200000 milliseconds
void setup() {
pinMode(speaker, OUTPUT);
Serial.begin(9600);
Serial.println("Adafruit SI1145 test");
if (! uv.begin()) {
Serial.println("Didn't find Si1145");
while (1);
}
Serial.println("OK!");
}
void loop() {
Serial.println("===================");
UVindex = uv.readUV();
UVindex /= 100.0; // the index is multiplied by 100 so to get the integer index, divide by 100!
Serial.print("UV: "); Serial.println(UVindex);
Serial.print("Seconds until next alert: "); Serial.println((reapplyInterval-sinceTime)/1000);
delay(1000);
sinceTime = millis()-markerTime;
if (UVindex > UVthreshold && shouldChime){ //only chime when we are currently outside
chime();
Serial.println("===================");
Serial.println("CHIME");
shouldChime = false;
resetTimer();
}
if (sinceTime > reapplyInterval) { //check to see if we've exceeded the time limit
shouldChime = true;
resetTimer;
}
}
void resetTimer(){
markerTime = millis();
sinceTime = 0;
}
void chime(){
int melody[] = {tonec, toneG, toneE, toneA, toneB, toneBb, toneA, toneG, tonee, toneg, tonea, tonef, toneg, tonee, tonec, toned, toneB};
int rhythm[] = {18, 18, 18, 12, 12, 6, 12, 8, 8, 8, 12, 6, 12, 12, 6, 6, 6};
long vel = 20000;
for (int i=0; i<17; i++) {
int note = melody[i];
int tempo = rhythm[i];
long tvalue = tempo * vel;
//tocar(note, tvalue);
long tempo_progress = 0;
while (tempo_progress < tvalue) {
digitalWrite(speaker, HIGH);
delayMicroseconds(note / 2);
digitalWrite(speaker, LOW);
delayMicroseconds(note/2);
tempo_progress += note;
}
delayMicroseconds(1000);
}
}
If everything's working properly, modify these two lines:
float UVthreshold = 0.05; long reapplyInterval = 10000; // 15 minutes = 900000 milliseconds. One hour = 3600000 milliseconds. Two hours = 7200000 milliseconds
to reflect the UV index you'd like to sound the alarm, and how often you'd like a reminder.
Page last edited July 22, 2014
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