DHT

STM32 LL(Low Layer) library for DHT11, DHT22 sensors

DHT11

• Ultra low cost
• 3 to 5V power and I/O
• 2.5mA max current use during conversion (while requesting data)
• Good for 20-80% humidity readings with 5% accuracy
• Good for 0-50°C temperature readings ±2°C accuracy
• No more than 1 Hz sampling rate (once every second)
• Body size 15.5mm x 12mm x 5.5mm
• 4 pins with 0.1" spacing

DHT22

• Low cost
• 3 to 5V power and I/O
• 2.5mA max current use during conversion (while requesting data)
• Good for 0-100% humidity readings with 2-5% accuracy
• Good for -40 to 80°C temperature readings ±0.5°C accuracy
• No more than 0.5 Hz sampling rate (once every 2 seconds)
• Body size 15.1mm x 25mm x 7.7mm
• 4 pins with 0.1" spacing

Add as CPM project dependency

How to add CPM to the project, check the link

CPMAddPackage(
        NAME DHT
        GITHUB_REPOSITORY ximtech/DHT
        GIT_TAG origin/main)

Project configuration

1. Start project with STM32CubeMX:
   • GPIO configuration
2. Select: Project Manager -> Advanced Settings -> GPIO -> LL
3. Generate Code
4. Add sources to project:

include_directories(${includes} 
        ${DHT_SENSOR_DIRECTORY})   # source directories

file(GLOB_RECURSE SOURCES ${sources} 
        ${DHT_SENSOR_SOURCES})    # source files

3. Then Build -> Clean -> Rebuild Project

Wiring

• 

Usage

• Usage example: link