. 2021 Oct 29;21(21):7202. doi: 10.3390/s21217202

Table 1.

Sensing nodes for the measurement of the different ambient variables and associated sensors and interfaces.

Node	Sensors	Measurement	Protocol (ESP32)
SOIL	DS18B20	Soil temperature (°C)	OneWire
	SKU-SEN0193	Soil humidity (%)	Analog
AIR	SCD30	CO₂ concentration (ppm) and ambient temperature (°C) & humidity (%)	I₂C
COMFORT	BME280	Ambient temperature (°C), humidity (%) & atmosphericpressure (hPa)	I₂C
	TI-OPT3001	Illuminance (lux)	I₂C
METEO	SEN-15901	Wind speed (m/s), wind direction (degrees) & rainfall (mm)
	BME280	Ambient temperature (°C), humidity (%) & atmosphericpressure (hPa)	I₂C
	CCS811	Air quality (Total Volatile Organic Compounds)	I₂C
	APDS-9301	Illuminance (lux)	I₂C