Difference between revisions of "Sonoff Sensor Si7021"
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==Overview== | ==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. | + | [[File:Sonoff_TH_sensor_Si7021_02.jpg|thumb|400px|right]] |
+ | [[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 [https://www.itead.cc/sonoff-th.html Sonoff Si7021(SKU:IM160712005) ] | ||
+ | |||
==Features== | ==Features== | ||
*Relative humidity and temperature measurement | *Relative humidity and temperature measurement | ||
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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 | ||
|- | |- | ||
− | | 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 || ℃ |
|- | |- | ||
| 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 || ℃ | ||
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==Pins== | ==Pins== | ||
+ | {| class="wikitable" | ||
+ | ! scope="col" | Pin || scope="col" | Name || scope="col" | Description | ||
+ | |- | ||
+ | | style="text-align:right" | 1 || VCC || Power supply 2.2~3.6VDC | ||
+ | |- | ||
+ | | style="text-align:right" | 2 || GND || GND | ||
+ | |- | ||
+ | | style="text-align:right" | 3 || NC || NC | ||
+ | |- | ||
+ | | style="text-align:right" | 4 || DATA || Single bus, data port | ||
+ | |} | ||
+ | |||
==Downloads== | ==Downloads== | ||
+ | |||
+ | [[:File:Sonoff Si7021 Sensor_Schematic.pdf | Sonoff Si7021 Sensor Schematic]] |
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 |