Product parameter
of core chip combination:
CCS811 :VOCs/CO₂ sensor (detection range: eCO₂ 400-8192ppm,TVOC 0-1187ppb)
HDC1080: high-precision temperature and humidity sensor (temperature:-40°C to +125°C ± 0.2°C; humidity: 0-100% RH ± 2%)
of working voltage of:
module input (VIN) :3.3V-5.5V DC (wide voltage compatible, on-board LDO regulated)
chip power supply (VDD) :1.8V-3.6V DC (internal automatic switching)
of interface type: I²C (double address: CCS811 = 0x5B,HDC1080 = 0x 40)
of detection accuracy of:
eCO₂: ± 50ppm or ± 15% (whichever is greater)
TVOC:±15%
response time :
Gas sensor: Refresh every 1 second after preheating for 60 seconds
Temperature and humidity: 650ms(14 bit resolution)
power consumption :
Operating mode: 1.2mA(CCS811)+0.9 μA(HDC1080)
Sleep mode: 0.8μA
of operating of: 0°C to +50°C (operating temperature), humidity

product main pin function
VIN: DC input positive (3.3V-5.5V DC), on-board AMS1117 regulated output 1.8V to sensor
GND: power supply ground, which needs to be shared with the main control system at a single point.
SCL :I²C clock line (open drain output), 4.7kΩ pull-up resistor needs to be externally connected to VIN
SDA :I²C data line (open drain output), 4.7kΩ pull-up resistor needs to be externally connected to VIN
WAKE :CCS811 wake-up pin (low level activation, default work when floating)
RST :CCS811 hardware reset (active low, duration> 20 μs)
ADDR0 :HDC1080 address selection (ground = 0x 40, floating = 0x 41)