dht20
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libdriver
DHT20 full function driver library for general MCU and Linux.
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LibDriver DHT20
DHT20 is a new upgraded product of DHT11, equipped with a dedicated ASIC sensor chip, a high-performance semiconductor silicon-based capacitive humidity sensor and a standard onchip temperature sensor, and uses a standard I2C data output signal format. Its performance has been greatly improved and has exceeded the reliability level of the previous generation sensor.The new generation of upgraded products have been improved to make their performance more stable in high temperature and high humidity environments; at the same time, the accuracy, response time, and measurement range of the product have been greatly improved.Each sensor is rigorously calibrated and tested before leaving the factory to ensure and satisfy customer’s large-scale applications. It can be used in HVAC, dehumidifier, testing and inspection equipment, consumer products, automobiles, automatic control, data loggers, weather stations, home appliances, humidity control, medical and other application fields which need to detect and control temperature and humidity.
LibDriver DHT20 is the full function driver of DHT20 launched by LibDriver.It provides the function of reading temperature and relative humidity. LibDriver is MISRA compliant.
Table of Contents
- Instruction
- Install
-
Usage
- example basic
- Document
- Contributing
- License
- Contact Us
Instruction
/src includes LibDriver DHT20 source files.
/interface includes LibDriver DHT20 IIC platform independent template.
/test includes LibDriver DHT20 driver test code and this code can test the chip necessary function simply.
/example includes LibDriver DHT20 sample code.
/doc includes LibDriver DHT20 offline document.
/datasheet includes DHT20 datasheet.
/project includes the common Linux and MCU development board sample code. All projects use the shell script to debug the driver and the detail instruction can be found in each project's README.md.
/misra includes the LibDriver MISRA code scanning results.
Install
Reference /interface IIC platform independent template and finish your platform IIC driver.
Add the /src directory, the interface driver for your platform, and your own drivers to your project, if you want to use the default example drivers, add the /example directory to your project.
Usage
You can refer to the examples in the /example directory to complete your own driver. If you want to use the default programming examples, here's how to use them.
example basic
#include "driver_dht20_basic.h"
uint8_t res;
uint8_t i;
float temperature;
uint8_t humidity;
res = dht20_basic_init();
if (res != 0)
{
return 1;
}
...
for (i = 0; i < 3; i++)
{
dht20_interface_delay_ms(2000);
res = dht20_basic_read((float *)&temperature, (uint8_t *)&humidity);
if (res != 0)
{
(void)dht20_basic_deinit();
return 1;
}
dht20_interface_debug_print("dht20: temperature is %0.2fC.\n", temperature);
dht20_interface_debug_print("dht20: humidity is %d%%.\n", humidity);
...
}
...
(void)dht20_basic_deinit();
return 0;
Document
Online documents: https://www.libdriver.com/docs/dht20/index.html.
Offline documents: /doc/html/index.html.
Contributing
Please refer to CONTRIBUTING.md.
License
Copyright (c) 2015 - present LibDriver All rights reserved
The MIT License (MIT)
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
Contact Us
Please sent an e-mail to [email protected].
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