Sonoff TH Sensor Si7021 (Itead IM170714003) Temperature and Humidity Sensor

Sonoff Si7021 Temperature and Humidity Sensor is a digital temperature and humidity sensor with a calibrated digital signal output. It adopts dedicated digital module acquisition technology and temperature&humidity sensing technology to ensure that the sensor has a very high reliability and excellent long-term stability. The sensor includes an integrated single-chip temperature and humidity sensor chip, which connects to a high-performance 8-bit MCU. The Si7021 sensor has advantages such as excellent quality, ultra-fast response, anti-interference ability and cost-effective. The sensor has 2.5mm 4-pole stereo audio male plug connector, which works perfectly with Sonoff TH10/TH16.

• Relative humidity and temperature measurement
• All calibrated, digital output
• Good long-term stability
• No additional parts required
• Ultra-low energy consumption
• The sensor is fully interchangeable
• Si7021(wiki)

Interface Description

It is recommended that the DATA pin use a 10K pull-up resistor and a 100nF capacitor can be added between the power supply pins (VCC, GND) for decoupling.

Audio Connector

Pins

Pin	Name	Description
1	VCC	Power supply 2.2~3.6VDC
2	GND	GND
3	NC	NC
4	DATA	Single bus, data port

Downloads

Sonoff Si7021 Sensor Schematic