dht11linuximx6

DHT11是一种温湿度传感器，可以用于检测环境中的温度和湿度。根据引用中提供的资料，《i.MX6UL终结者光盘资料\03_开发板硬件资料\02_芯片资料\DHT11.pdf》中有关DHT11的更详细介绍。

DHT11的接口非常简单，只有四个引脚，分别是电源、数据引脚、NC（悬空不需要连接）和GND。通常在连接到处理器时，会通过一个4.7K的电阻将DATA引脚上拉，以保持在空闲状态下的高电平。DHT11采用单总线通信，即只有一个数据线完成系统中的数据交换和控制。具体的数据获取流程如下：
1. 首先，总线处于空闲状态，通过上拉电阻保持高电平。处理器将驱动总线的IO配置为输出模式，并输出低电平（最少18ms）来启动DHT11，然后在输出高电平（20~40us）表示起始信号结束。
2. 然后，处理器将IO配置为输入模式，准备接收DHT11的应答数据。
3. 当DHT11检测到处理器发送的起始信号后，就开始应答，回传采集到的传感器数据。DHT11先将总线拉低80us作为对处理器的应答（ACK），然后接着将总线拉高80us，准备回传采集到的温湿度数据。

关于DHT11的详细的串口传输程序，可以参考引用中的资料。通过调用value_array[SIZE]可以完成串口通信和数据传输协议。

相关问题

stm32rct6 dht11

stm32rct6是指正点原子mini stm32f103RCT6开发板，而DHT11则是指DHT11温湿度传感器。在使用stm32rct6开发板读取DHT11传感器的温湿度数据时，可以参考引用提供的DHT11.h头文件中的函数和宏定义来进行操作。引用中给出了一些常用的函数，比如DHT11_Init用于初始化DHT11传感器，DHT11_Read_Data用于读取温湿度数据，DHT11_Check用于检测是否存在DHT11传感器等等。引用提供了一个关于stm32f103和DHT11传感器的例程，可以参考其中的代码实现来完成读取温湿度数据的功能。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *2* [DHT11通过串口打印数值实验【基于stm32f103RCT6】](https://blog.csdn.net/qq_38341992/article/details/103499689)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"]
- *3* [stm32f103+dht11温湿度传感器例程](https://download.csdn.net/download/panxiang162497/12102773)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"]
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stm32c8t6 dht11

The STM32C8T6 is a microcontroller based on the ARM Cortex-M3 architecture, developed by STMicroelectronics. It features a 32-bit RISC core with a maximum clock speed of 72 MHz, and a variety of peripherals including timers, ADCs, DACs, and communication interfaces such as UART, SPI, and I2C.

The DHT11 is a low-cost temperature and humidity sensor that uses a digital signal output. It has a measurement range of 0-50°C for temperature and 20-90% for humidity, with an accuracy of ±2°C and ±5% for temperature and humidity, respectively. It communicates with the STM32C8T6 via a one-wire interface, where the microcontroller sends a request signal and the DHT11 responds with the measurement data.

Together, the STM32C8T6 and DHT11 can be used in a variety of applications that require temperature and humidity monitoring, such as environmental control systems, weather stations, and agricultural monitoring.