weather-station/Arduino/outdoor-weather-station/outdoor-weather-station.ino

//#define TEST_MODE
#define USE_SERIAL

#define LIGHT_PIN A3

#define ERR reboot()

#ifndef TEST_MODE
#define SLEEP_TIME_MIN 5
#define SLEEP_TIME_SEC 60 * SLEEP_TIME_MIN
#define SLEEP_TIME_MS 1000 * SLEEP_TIME_SEC
#else
#define SLEEP_TIME_MS 10 * 1000 // 10 second sleep in test mode
#endif

#define WIFI_TIMEOUT_SECONDS 30 // How long to wait before giving up on wifi connection

#ifdef USE_SERIAL
char log_buff[200];
#define debug(...) if(Serial) { sprintf(log_buff, __VA_ARGS__); Serial.println(log_buff); Serial.flush(); }
#define debugln(X, Y) if(Serial) { Serial.print(X); Serial.println(Y); } // For things that can't be represented as a normal % formatter 
#define debugNoLn(...) if(Serial) { sprintf(log_buff, __VA_ARGS__); Serial.print(log_buff); }
#else
#define debug(...)
#define debugln(X, Y)
#define debugNoLn(...)
#endif

#define RTDB_AUTH_TOKEN "abc123"
#define RTDB_PROJECT "weather-project"
#define RTDB_PATH "outdoor"

const String RTDB_HOST = String(RTDB_PROJECT) + "-default-rtdb.firebaseio.com";
const String RTDB_URL = String("https://") + RTDB_HOST + "/" + RTDB_PATH + ".json?auth=" + RTDB_AUTH_TOKEN;

// Used in various places to get the sleep time to be as close to SLEEP_TIME_MIN as possible.
int64_t wakeTime;

// Defined later, but declare it now.
void showError();

// Turn LEDs on to red, then go into deep sleep, restarting after 5 seconds.
// Effectively doing a reboot, while visually displaying an error state.
void reboot() {
	showError();
	const int64_t reboot_sleep_time = 5 * 1000 * 1000;
	debug("Rebooting by going to sleep for: %d", reboot_sleep_time);
	esp_sleep_enable_timer_wakeup(reboot_sleep_time);
	Serial.flush();
	esp_deep_sleep_start();
}