DHT11 STM32F4 Library

This library provides an interface for the DHT11 temperature and humidity sensor using STM32F4 microcontrollers, specifically tested with the STM32 Nucleo F401RE.

Features

• Read temperature and humidity data from the DHT11 sensor
• Simple API for easy integration

Requirements

• STM32F4 microcontroller (tested with STM32 Nucleo F401RE)
• STM32CubeMX and HAL libraries
• DHT11 sensor

Installation

1. Clone the repository:

   git clone https://github.com/Baryonics/dht11-stm32f4.git

2. Add the entire dht11-stm32f4 folder to your projects Libs folder.
3. Include the DHT11 library in your CMakeLists.txt file:

   # Add sources to executable
   target_sources(${CMAKE_PROJECT_NAME} PRIVATE
       # Add user sources here
       Libs/dht11-stm32f4/Src/dht11-stm32f4.c
   )
   
   
   # Add include paths
   target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE
       # Add user defined include paths
       Libs/dht11-stm32f4/Inc
   )

4. Include the DHT11 library in your main code:

   #include "dht11-stm32f4.h"

Usage

1. Initialize the DHT11 sensor (ensure the timer htim is prescaled so that one tick equals one microsecond. For the Nucleo F401RE, set the prescaler to 84):
2. Initialize the DHT11 sensor:

   DHT11_Init(DHT11_DATA_Port, DHT11_DATA_Pin, htim);

3. Read data from the sensor:

   uint16_t temp;
   uint16_t rh;
   
   DHT11_Status dht11_status = dht11_read(&temp, &rh);

API Reference

void DHT11_Init(void)

Initializes the DHT11 sensor.

DHT11_Status DHT11_Read(uint16_t *temp, uint16_t *rh)

Reads temperature and humidity data from the DHT11 sensor.

• *temp: Pointer to a variable to store the read temperature data.
• *rh: Pointer to a variable to store the read humidity data.
• Returns DHT11_OK on success, or an error code on failure.