This is a simple Arduino sketch for the M5Stack Timer Camera. Every time the ESP32 wakes up, it takes a picture, uploads it to a Firebase storage DB, and sends a Telegram message indicating the picture filename and battery level. It then goes into deep sleep for a specified number of hours to minimize power usage.
Required libraries:
You must set the following constants to the credentials for your WiFi, Firebase bucket and Telegram bot:
WIFI_SSIDWIFI_PASSWORDFIREBASE_USER_EMAILFIREBASE_USER_PASSWDFIREBASE_API_KEYFIREBASE_BUCKET_IDTELEGRAM_BOT_TOKENTELEGRAM_CHAT_ID