NoticeDifference between revisions of "Sonoff Sensor Si7021"
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| Voltage input || VCC || style="text-align:right" | 2.2 || 3.3 || style="text-align:right" | 3.6 || V | | Voltage input || VCC || style="text-align:right" | 2.2 || 3.3 || style="text-align:right" | 3.6 || V | ||
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| − | | Operating temp. || Ta || style="text-align:right" | -40 || - || style="text-align:right" | +85 || ℃ | + | | Operating temp. & Measuring range || Ta || style="text-align:right" | -40 || - || style="text-align:right" | +85 || ℃ |
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| Storage temp. || Ta || style="text-align:right" | -65 || - || style="text-align:right" | +150 || ℃ | | Storage temp. || Ta || style="text-align:right" | -65 || - || style="text-align:right" | +150 || ℃ | ||
Latest revision as of 01:59, 12 September 2017
Contents
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, S22 Socket.
Go shopping Sonoff Si7021(SKU:IM160712005)
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. & Measuring range | 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 | |
Figure 1. RH Accuracy at 30℃
Figure 2. Temperature Accuracy
Hardware
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 |
