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// Sensor Watch: Hiking Log Demo App
// This app displays a clock and temperature data from a BME280 temperature and humidiity sensor.
// It also logs up to 36 hours of temperature data for playback.
// You can use this app on backcountry treks: take the watch off at night and place it outside your tent.
// It will log overnight low temperatures for review in the morning and optional transfer to your notepad.
#define MAX_DATA_POINTS 36
typedef enum ApplicationMode {
MODE_CLOCK = 0, // Displays month, day and current time.
MODE_TEMP, // (TE) Displays temperature and an optional humidity reading (0-10 representing 0-100%)
MODE_LOG, // (LO) Plays back temperature data (temperature in seconds slot)
MODE_PREFS, // (PR) Allows setting options for the application
MODE_SET, // (ST) Set time and date
NUM_MODES // Last item in the enum, it's the number of cases.
} ApplicationMode;
typedef struct SensorReading {
bool is_valid;
uint8_t hour;
int8_t temperature;
} SensorReading;
typedef struct ApplicationState {
// Internal application state
ApplicationMode mode; // Current mode
bool mode_changed; // Lets us perform one-time setup for a given mode
uint16_t mode_ticks; // Timeout for the mode (returns to clock after timeout expires)
uint8_t light_ticks; // Timeout for the light
bool led_on; // Indicates that the LED is on
uint8_t page; // Tracks the current page in log, prefs or settings.
} ApplicationState;
void cb_light_pressed();
void cb_mode_pressed();
void cb_alarm_pressed();
void cb_tick();
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