Environment - SI7021/HTU21D¶
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Plugin details¶
Type: Environment
Name: SI7021/HTU21D
Status: NORMAL CLIMATE
GitHub: P014_SI70xx.ino
Maintainer: .
Used libraries: .
Supported hardware¶
SI7013:¶
Has support for humidity, temperature and ADC values
± 3% RH (max), 0–80% RH (0 to 100% RH operating range)
±0.4 °C (max), –10 to 85 °C (–40 to +125 °C operating range)
Operating Voltage (1.9 to 3.6 V)
Low Power Consumption: 150 μA active current ; 60 nA standby current
Analog To Digital converter builtin.
Datasheet: <https://www.silabs.com/sensors/humidity/si7006-13-20-21-34/device.si7013-a20-gm1> Direct link: <https://www.silabs.com/documents/public/data-sheets/Si7013-A20.pdf>
- If using the SI7013 to measure ADC make sure you implement one of the two thermistor (thermistor can we replaced with LRD for light level measurements) circuit diagrams:
Figure 5. Typical Application Circuit for Thermistor Interface with AD0 = 1
Figure 6. Typical Application Circuit for Thermistor Interface with AD0 = 0
- Do not use the single ended circuit as the Vout is connected directly to ground:
Figure 7. Typical Application Circuit for Single Ended 0 to 3 V Measurement (!DO NOT USE THIS CIRCUIT!)
SI7020 and SI7021:¶
Si7020: ± 4% RH (max), 0–80% RH (0 to 100% RH operating range)
Si7021: ± 3% RH (max), 0–80% RH (0 to 100% RH operating range)
±0.4 °C (max), –10 to 85 °C (–40 to +125 °C operating range)
Operating voltage (1.9 to 3.6 V)
Low Power Consumption: 150 µA active current ; 60 nA standby current
No ADC builtin.
Note: The plugin reads the CHIP ID to determine if the ADC is available. This Plugin is NOT compatible with SHT20, for SHT2x devices use Plugin 122.
HTU21D devices while using the same reading protocol do not have a CHIP ID capability and not able to detect them.
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Change log¶
Changed in version 3.0: …
added Another major overhaul and currently supporting: SI7013,SI7020,SI7021
Changed in version 2.0: …
added Major overhaul for 2.0 release.
New in version 1.0: …
added Initial release version.