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dayshift.ino
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dayshift.ino
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/*
DayShift
Uses a short 2ms pulse of light every 10s from 4am until wakeup to shift the circadian rythm.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4767340/
http://blog.dansplan.com/a-new-product-to-significantly-reduce-jet-lag-interview-with-stanford-professor-jamie-zeitzer/
November 2016, Peter Kuhar & Helena Jagodnik
*/
// Configure this if your board is not Arduino 101
// This are configurable from the app on arduino 101
double initialTimeOfDay = 23; // the time of powering up the board
double flashStartTime = 4.5; // when in the morning you want the flashing start
double flashEndTime = 8.0; // when do you want the flashign end
double secondBetweenFlashes = 10.0;
// end of configuration section
#define LED_STATUS 13
#define LED_FLASH 12
// This is the current time when the sketch starts running.
// 0-24h
long dayStartMillis = 0;
void setTimeOfDay(double timeOfDay) {
dayStartMillis = millis() - timeOfDay * 3600.0 * 1000.0;
}
// return time of day in 0 - 24.0 double format
double timeOfDay() {
return ((double)((millis() - dayStartMillis) % (24 * 3600 * 1000))) / 1000.0 /
3600.0;
}
void setup_ble();
void loop_ble();
void setup() {
setTimeOfDay(initialTimeOfDay);
setup_ble();
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_STATUS, OUTPUT);
pinMode(LED_FLASH, OUTPUT);
digitalWrite(LED_STATUS, LOW);
digitalWrite(LED_FLASH, LOW);
Serial.begin(9600);
}
void loop_flash() {
if (timeOfDay() >= flashStartTime && timeOfDay() <= flashEndTime) {
// in the flash zone.
static long lastFlashMillis = 0;
if (millis() > lastFlashMillis + secondBetweenFlashes * 1000) {
lastFlashMillis = millis();
digitalWrite(LED_STATUS, HIGH);
digitalWrite(LED_FLASH, HIGH);
delay(2);
digitalWrite(LED_STATUS, LOW);
digitalWrite(LED_FLASH, LOW);
Serial.println("Flash");
}
}
}
// the loop function runs over and over again forever
void loop() {
static bool serialInitialized = false;
if (Serial && !serialInitialized) {
serialInitialized = true;
Serial.println("DayShift");
}
loop_flash();
loop_ble();
}
#ifndef ARDUINO_ARCH_ARC32
void setup_ble() {}
void loop_ble() {}
#endif
/**
Arduino 101
Use Bluetooth Low energy to set settings
*/
#ifdef ARDUINO_ARCH_ARC32
#include <CurieBLE.h>
BLEPeripheral
blePeripheral; // BLE Peripheral Device (the board you're programming)
BLEService
ledService("19B10000-E8F2-537E-4F6C-D104768A1214"); // BLE LED Service
// BLE LED Switch Characteristic - custom 128-bit UUID, read and writable by
// central
BLEFloatCharacteristic
startTimeCharacteristic("19B10002-E8F2-537E-4F6C-D104768A1214",
BLERead | BLEWrite);
BLEFloatCharacteristic
endTimeCharacteristic("19B10003-E8F2-537E-4F6C-D104768A1214",
BLERead | BLEWrite);
BLEFloatCharacteristic
intervalCharacteristic("19B10004-E8F2-537E-4F6C-D104768A1214",
BLERead | BLEWrite);
BLEFloatCharacteristic
timeOfDayCharacteristic("19B10005-E8F2-537E-4F6C-D104768A1214",
BLERead | BLEWrite);
void setup_ble() {
// set advertised local name and service UUID:
blePeripheral.setLocalName("DayShift");
blePeripheral.setAdvertisedServiceUuid(ledService.uuid());
// add service and characteristic:
blePeripheral.addAttribute(ledService);
blePeripheral.addAttribute(startTimeCharacteristic);
blePeripheral.addAttribute(endTimeCharacteristic);
blePeripheral.addAttribute(intervalCharacteristic);
blePeripheral.addAttribute(timeOfDayCharacteristic);
// set the initial value for the characeristic:
startTimeCharacteristic.setValue(flashStartTime);
endTimeCharacteristic.setValue(flashEndTime);
intervalCharacteristic.setValue(secondBetweenFlashes);
timeOfDayCharacteristic.setValue(initialTimeOfDay);
// begin advertising BLE service:
blePeripheral.begin();
}
// BLECentral central = blePeripheral.central();
void loop_ble() {
static bool wasConnected = false;
static BLECentral central = blePeripheral.central();
if (!central) {
// pull for new connection
central = blePeripheral.central();
}
if (central && wasConnected == false) {
// new connection
wasConnected = true;
Serial.print("Connected to central: ");
// print the central's MAC address:
Serial.println(central.address());
} else if (central && central.connected()) {
// loop code
if (startTimeCharacteristic.written()) {
flashStartTime = startTimeCharacteristic.value();
Serial.print("startTime:");
Serial.println(flashStartTime);
}
if (endTimeCharacteristic.written()) {
flashEndTime = endTimeCharacteristic.value();
Serial.print("endTime:");
Serial.println(flashEndTime);
}
if (intervalCharacteristic.written()) {
secondBetweenFlashes = intervalCharacteristic.value();
Serial.print("interval:");
Serial.println(secondBetweenFlashes);
}
if (timeOfDayCharacteristic.written()) {
double time = timeOfDayCharacteristic.value();
setTimeOfDay(time);
Serial.print("currentTime:");
Serial.println(time);
}
} else if (central && !central.connected()) {
// disconnected
wasConnected = false;
// when the central disconnects, print it out:
Serial.print(F("Disconnected from central: "));
Serial.println(central.address());
central = blePeripheral.central(); // prepare for new connection
}
}
#endif //#ifdef ARDUINO_ARCH_ARC32