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Humidity hysteresis

+-0.5%RH

Long-term Stability

+-0.5%RH/year

Interchangeability

fully interchangeable

4. Dimensions of RHT02's PCB board(unit----mm) and wiring diagram:

Pin

Function

1

VDD----power supply , red wire

2

DATA--signal, yellow wire

3

GND, black wire

4

Null

5. Electrical connection diagram:

6. Operating specifications:

(1) Power and Pins

Power's voltage should be 3.3-6V DC. When power is supplied to sensor, don't send any instruction to the sensor

within one second to pass unstable status. One capacitor valued 100nF can be added between VDD and GND for

wave filtering.

(2) Communication and signal

MaxDetect 1-wire bus is used for communication between MCU and RHT02. ( MaxDetect 1-wire bus is

specially designed by MaxDetect Technology Co., Ltd. , it's different from Maxim/Dallas 1-wire bus, so it's

incompatible with Dallas 1-wire bus.)