Difference between revisions of "Sonoff Sensor Si7021"

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===Performance parameters===
 
===Performance parameters===
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{| class="wikitable"
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! scope="col" | Parameter || scope="col" | Condition || scope="col" | Min || scope="col" | Typ || scope="col" | Max || scope="col" | Unit
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|-
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| colspan=6 | Humidity
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|-
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| Operating range ||  || 0 || — || 100 || %RH
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|-
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| rowspan=2 | Accuracy || 0-80 || — || ±2 || ±3 || rowspan=2 | %RH
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|-
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|  80-100 || colspan=3 | See Figure 1
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|-
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| Temperture drift ||  || — || 0.05 || — || %RH/℃
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|-
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| Stability ||  || — || ≤0.25 || — || %RH/yr
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|-
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|colspan=6 | Temperature
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|-
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| Operating range ||  || -40 || — || +85 || ℃
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|-
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| rowspan=2 |Accuracy || -10≤Ta≤85 || — || ±0.3 || ±0.4 || rowspan=2 | ℃
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|-
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|  -40≤Ta≤125 ||colspan=3 | See Figure 2
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|-
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| Stability ||  || — || ≤0.01 || — || ℃/yr
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|}
  
 
==Hardware==
 
==Hardware==

Revision as of 07:42, 21 July 2017

Overview

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.

Features

  • 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

Electrical Characteristics

Rated Parameters

Parameter Symbol Min Typ Max Unit
Voltage input VCC 2.2 3.3 3.6 V
Operating temp. Ta -40 - +85 ℃
Storage temp. Ta -65 - +150 ℃

Performance parameters

Parameter Condition Min Typ Max Unit
Humidity
Operating range 0 — 100  %RH
Accuracy 0-80 — ±2 ±3  %RH
80-100 See Figure 1
Temperture drift — 0.05 —  %RH/℃
Stability — ≤0.25 —  %RH/yr
Temperature
Operating range -40 — +85 ℃
Accuracy -10≤Ta≤85 — ±0.3 ±0.4 ℃
-40≤Ta≤125 See Figure 2
Stability — ≤0.01 — ℃/yr

Hardware

Interface Description

Audio Connector

Pins

Downloads

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