1 files changed, 37 insertions, 0 deletions
diff --git a/apps/Light Meter/app.h b/apps/Light Meter/app.h
new file mode 100644
index 00000000..ac25c1e2
--- /dev/null
+++ b/apps/Light Meter/app.h
@@ -0,0 +1,37 @@
+// 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();