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152 lines
5.4 KiB
Markdown
152 lines
5.4 KiB
Markdown
# ENV
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<el-tag effect="plain">SKU:U001</el-tag>
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<div class="product_pic"><img src="assets/img/product_pics/unit/env/unit_env_01.webp"></div>
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## Description
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**ENV** is a environmental sensor, can be used for temperature, humidity, and atmospheric pressure measurement.
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The ENV sensor integrates DHT12 and BMP280 sensors.
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DHT12 is an upgraded version of DHT11 humidity temperature sensor: complete downward compatibility, higher precision and added I2C interface.
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BMP280 is an absolute barometric pressure sensor especially designed for mobile applications, offers highest flexibility to optimize the device regarding power consumption, resolution and filter performance.
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**I2C address:DHT12(0x5C)、BMP280(0x76)**
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## Product Features
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- GROVE interface, support [UIFlow](http://flow.m5stack.com) and [Arduino](http://www.arduino.cc)
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- Two Lego installation holes
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## Include
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- 1x ENV Unit
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- 1x Grove Cable
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## Specification
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<table>
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<tr style="font-weight:bold">
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<td>Resources</td>
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<td>Parameter</td>
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</tr>
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<tr>
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<td>Temperature measuring range/resolution</td>
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<td>-20 ~ 60 ℃ / ±0.2℃</td>
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</tr>
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<tr>
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<td>Humidity measuring range/resolution</td>
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<td>20 ~ 95 %RH / ±0.1%</td>
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</tr>
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<tr>
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<td>Air pressure measuring range/resolution</td>
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<td>300 ~ 1100hPa / ±1hPa</td>
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</tr>
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<tr>
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<td>communication protocol</td>
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<td>I2C：DHT12(0x5C),BMP280(0x76)</td>
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</tr>
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<tr>
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<td>Operating temperature</td>
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<td>32°F to 104°F ( 0°C to 40°C )</td>
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</tr>
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<tr>
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<td>Net weight</td>
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<td>4g</td>
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</tr>
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<tr>
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<td>Gross weight</td>
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<td>17g</td>
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</tr>
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<tr>
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<td>Product Size</td>
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<td>24.2*32.2*8.1mm</td>
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</tr>
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<tr>
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<td>Package Size</td>
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<td>67*53*12mm</td>
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</tr>
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<tr>
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<td>Material</td>
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<td>Plastic(PC)</td>
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</tr>
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</table>
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## Related Links
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- **[BMP280 library](https://github.com/adafruit/Adafruit_BMP280_Library)**
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- **[BMP280 Datasheet](https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/datasheet/hat/BMP280-DS001-11_en.pdf)**
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- **[DHT12 Datasheet](https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/datasheet/hat/DHT12_en.pdf)**
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## EasyLoader
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>EasyLoader is a concise and fast program writer, which has a built-in case program related to the product. It can be burned to the main control by simple steps to perform a series of function verification. Please install the corresponding driver according to the device type. M5Core host [Please click here to view the CP210X driver installation tutorial](en/arduino/arduino_development), M5StickC/V/T/ATOM series can be used without driver)
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<div class="easyloader-box">
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<div style="background-color:white;">
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<div><img src="https://m5stack.oss-cn-shenzhen.aliyuncs.com/image/easyloader_intro.webp"></div>
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<div class="easyloader-btn">
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<a href="https://m5stack.oss-cn-shenzhen.aliyuncs.com/EasyLoader/Windows/UNIT/For%20M5Core/EasyLoader_ENV_UNIT_With_M5Core.exe">Windows</a>
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<a href="https://m5stack.oss-cn-shenzhen.aliyuncs.com/EasyLoader/MacOS/UNIT/EasyLoader_ENV_UNIT_With_M5Core.dmg">MacOS</a>
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<!-- <a>Linux</a>
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<a>MacOS</a> -->
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</div>
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</div>
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<div>
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<video id="example_video" controls>
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<source src="https://m5stack.oss-cn-shenzhen.aliyuncs.com/video/Product_example_video/Unit/ENV_UNIT.mp4" type="video/mp4">
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</video>
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<div class="easyloader-mask">
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<a>
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<svg id="play-btn" t="1583228776634" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="4152" width="75" height="75"><path d="M512 0C229.216 0 0 229.216 0 512s229.216 512 512 512 512-229.216 512-512S794.784 0 512 0z m0 928C282.24 928 96 741.76 96 512S282.24 96 512 96s416 186.24 416 416-186.24 416-416 416zM384 288l384 224-384 224z" p-id="4153" fill="#007aff"></path></svg></a>
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<p>Description:</p>
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<p>Display temperature, humidity and atmospheric pressure data.</p>
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</div>
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</div>
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</div>
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## Schematic
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<img src="assets/img/product_pics/unit/env_sch.JPG">
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## PinMap
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<table>
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<tr><td>M5Core(GROVE A)</td><td>GPIO22</td><td>GPIO21</td><td>5V</td><td>GND</td></tr>
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<tr><td>ENV Unit</td><td>SCL</td><td>SDA</td><td>5V</td><td>GND</td></tr>
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</table>
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## Example
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### 1. Arduino
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This is a ENV example, implemented with reading temperature, humidity and atmospheric pressure functionalities.
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1. Before compiling, please install `Adafruit BMP280 Library`
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2. copy `Adafruit_Sensor.h` to `C:\Users\<user_name>\Documents\Arduino\libraries\Adafruit_BMP280_Library`
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The code below is incomplete. To get the complete code, please click [here](https://github.com/m5stack/M5Stack/tree/master/examples/Unit/ENV_DHT12_BMP280)
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### 2. UIFlow
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- [Click here to download the UIFlow example](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/Unit/ENV/UIFlow)
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<img src="assets/img/product_pics/unit/unit_example/ENV/example_unit_env_05.webp" width="60%">
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<el-divider content-position="right">Last updated: 2020-12-11</el-divider>
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<script>
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var purchase_link = 'https://m5stack.com/collections/m5-unit/products/mini-env-sensor-unit';
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anchor_search(purchase_link);
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scrollFunc();
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</script>
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