Background Knowledge The DHT11 temperature and humidity sensor includes a resistive humidity sensing element and an NTC temperature sensing element. It features strong response and anti-interference capabilities, as well as a high cost-performance ratio. Each DHT11 sensor is calibrated in a highly precise humidity calibration chamber. The calibration coefficients are stored in OTP memory in … Read more
Table of Contents 1. Introduction to DHT11 2. Code Implementation 3. Summary & Precautions 01 — Introduction to DHT11 The DHT11 is a composite sensor for temperature and humidity that features a calibrated digital signal output. It utilizes dedicated digital module acquisition technology and temperature and humidity sensing technology, ensuring high reliability and excellent long-term … Read more
1. Introduction to I2C IIC (Inter-Integrated Circuit) is a synchronous, half-duplex, two-wire serial communication bus proposed by Philips, mainly used for short-distance communication between chips, such as between MCU and EEPROM, RTC, OLED screens, MPU6050 sensors, and other modules. Main features are as follows:Two-wire communication:SCL (clock line) and SDA (data line)Supports multiple master/slave communicationsUnique addressing:Each … Read more
DIY Smart Environmental Monitoring! Build a High-Precision Temperature and Humidity Sensor with ESP32 Say goodbye to stuffiness and dampness, easily build your own environmental monitoring system In modern smart home systems, temperature and humidity monitoring is an essential basic function. Today, I will teach you how to use the powerful ESP32 development board, paired with … Read more
In the field of the Internet of Things (IoT), the C language is widely used due to its efficiency and direct control over hardware. This article will introduce how to use C language for communication between sensors and devices, helping beginners understand this process. 1. What is the Internet of Things? The Internet of Things … Read more