Weather station and clock, running on an ESP32 using the Arduino framework and FreeRTOS. Measures and displays indoor environmental data (weather and air pollution) in real-time, as well as outdoor weather data through the OpenWeather API.
| Dashboard example | Enclosure: Box | Enclosure: Lid |
|---|---|---|
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Important
Download the already compiled firmware(.hex, .bin, the partitions.bin and the spiffs) from the release page and flash it to your ESP32.
Alternatively, you can build it from source by yourself.
Boot the ESP and connect to the created WIFI network "STA esp". The default password (P@55w0rd) is in the configs.hpp header file.
Connect the ESP to the desired WIFI network in the wifimanager portal, then reboot to validate the access point. After that, you'll have to reconnect to the portal in the setup page, to enter the required configuration parameters. After that, the esp will reboot and you'll be all set. Voilà.
# build and upload file system
platformio run --target uploadfs -e esp32dev
# build and upload firmware
platformio run --target upload -e esp32devNote
You can access the web server via http://weather_sta.local or by looking up the ip addressed assigned to the esp32 and going to http://[ip_addr]
Many of the configuration options can be modified in the configs.hpp. Such as timing related, ntp servers and timezone etc.
Almost the essentials configs can be done dynamically. After the firmware has been built, you can use the wifi manager portal to set the value as you wish.
You can upload a new firmware through WiFiManager at http://[ip_addr]/update. You can enable the on-demand portal using the physical button connected to the pin27, and navigate to Chg WLAN and set it to Yes.
Two Operating Modes: The system operates in two distinct modes - Clock Mode (default) and Station Mode.
- Clock Mode: Displays indoor environment data (temperature, humidity, CO2 concentration) and the current time. The time is fetched using the NTP protocol.
- Station Mode: Cycles through displaying indoor data, current outdoor data from the OpenWeather API, and outdoor forecast data. After cycling, the system goes idle for a configurable duration, shuts down, and then restarts.
Note
The system uses a PIR sensor to detect human presence and manage the LCD backlight, reducing power consumption. The PIR sensor's duration is configurable.
The system connects to WiFi using WiFiManager with local webserver
Three LEDs indicating rain (from current weather data), hot (indoor temperature above 24°C), and cold conditions.
A buzzer provides hourly chimes, with a long chime at 12 am and pm. It stops making noise from 2 am to 6 am.
InfluxDB integration: pushes every 10s data that can be visualized using the provided dashboard (see influx_dashboard) STL files for a 3D printable enclosure.
- BME280 Sensor: Used for measuring indoor temperature, humidity, and pressure.
- SCD40 Sensor: Used for measuring indoor CO2 concentration.
More in platformio.ini file.
| Module | Connection |
|---|---|
| LCD 16x2 | I2C |
| BME280 | I2C |
| SCD40 | I2C |
| LED cold | D19 |
| LED hot | D18 |
| LED rain | D5 |
| BTN | D27 |
| Buzzer | D2 |
| PIR | D17 |
WIFI connection lost: LED cold and LED hot blink for 5s.
CLOCK mode {ON/OFF}, LCD Speed 250-500(ms), Sleep T 30-60(s), Deep-sleep T 15-60(mins),Am/PM {AM/PM}, Chg WLAN {ON/OFF}
- Outdoors air quality metrics
- Add target for other esp version