air_monitor_dcf77_clock

Combination of an air monitor and a clock:

• Air monitor shows a VOC index, humidity and temperature values.
• The clock uses a DCF77 module to receive the current time from Frankfurt, when the device is started.

A LED is used to show the DCF77 communication at start (display is turned off until the time was received, the signal will be disturbed by I2C bus).
A switch is used to toggle the display view.

This circuit uses a 1.3 inch OLED display to show the following values:

• VOC index from Sensirion
• Relative humidity [%]
• Temperature [°C]
• Time [hh:mm:ss]
• Week day
• Date [dd.mm.yyyy]

Components in use:

• Sensirion SGP40 sensor
• Bosch BME280 sensor
• DS3231 RTC modul
• 1.3 inch OLED modul
• Arduino Nano
• DCF77 module