4.1.2 Payload (continue)
Status
Sensors status
Bits [0]
Bits [3:1]
Bits[4]
Bits[5]
Bits[6]
Bits[7]
1 – Trigger Event, 0 – Keep-Alive
RFU
1 - Temperature status is changed ( 2
℃
delta)
1 - RH status is changed (5% RH deltas)
1 - IAQ status is changed (25 IAQ index)
RFU
Battery
Battery level
Bits [3:0]
Bits [7:4]
unsigned value
ν
, range 1 – 14;
battery voltage in V = (25 +
ν
) ÷ 10.
RFU
Board Temp
Temperature as measured by on-board NTC
Bits [6:0]
Bit [7]
unsigned value
τ
, range 0 – 127;
temperature in °C =
τ
- 32.
RFU
measurement range -32 to 95°C
RH
Relative humidity as measured by digital sensor
Bits [6:0]
Bit [7]
unsigned value in %, range 0-100.
RFU
eCO
2
CO2 equivalent estimate
Bits [15:0]
Estimation of the CO2 level in ppm. The
sensor does not directly measure CO2
，
but
derives this from the average correlation
between VOCs and CO2 in human’s exhaled
breath.
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