1. Introduction to WiFi Modes The ESP32 has two main WiFi modes: STA and AP modes. AP mode refers to Access Point mode, which can be connected by other devices; STA mode refers to Station mode, which can connect to hotspots. The ESP32S3 supports the coexistence of both STA and AP modes, for example, a … Read more
A long time ago, I implemented this feature in a DIY smart curtain project to change the window opening strategy on rainy days. Today, I need to use the base station to query location information, so I thought I would write an article to introduce both functionalities together for my future reference. 1. Principles of … Read more
01 Overview The ultrasonic sensor is a type of sensor that uses ultrasonic waves to measure the distance to obstacles in front. This ultrasonic sensor has undergone many optimizations, providing stable performance and accurate distance measurement, and is compatible with LEGO small particle blocks. 02 Principle Humans can hear sounds due to vibrations of objects, … Read more
01 Overview The OLED screen has advantages such as high contrast, low power consumption, wide viewing angles, and self-emissive pixels, making it suitable for small display applications like wearable devices and desktop widgets. This OLED display has a size of 0.96 inches, with a resolution of 128×64 pixels, and uses I2C communication, driven by the … Read more
Espressif’s Board of Directors It is said that shareholders of 688018 are paying attention. Recently, an academic paper titled “Integrated Wheel Sensor Communication using ESP32 — A Contribution towards a Digital Twin of the Road System” selected the ESP32 as the core module for wheel sensor data collection and communication, aiming to promote the construction … Read more
Store receipts need to be printed, embedded systems require local storage, and devices must operate offline—complex protocols, size constraints, and long development cycles often hinder good ideas at the “last mile.” Now, there is a thermal printing solution based on the ESP32: direct serial connection, simple commands, supporting text/QR codes/barcodes/images, allowing for quick setup of … Read more
Internet of Everything Arduino-MQTT Development Teaching (Part Three) Welcome, students, to this creative and technologically captivating innovative technology class! Have you ever thought about how every object in our lives can “speak” and interact with us in wonderful ways? This is not a fantasy, but a future vision painted by Internet of Things (IoT) technology! … Read more
Friends, recently I needed to use SPI communication, so I used two boards, the STM32F03C8T6 and the ESP32, to implement SPI communication between them. Here, the STM32 acts as the SPI master, using the STM32 standard library functions. The ESP32 acts as the SPI slave, using the ESP-IDF spi_slave driver.P.S. I searched online for a … Read more
01 ESP32 Bluetooth FM Speaker Open Source User: Aknice Project Overview: Using the Anxin Ke ESP32-S development board to receive Bluetooth output I2S signals for decoding by UDA1334. The audio signal is switched between ESP32-S Bluetooth, FM, and AUX sources to the PAM8406 amplifier via a CD4052 switch, providing 5W x 2 in a 2.0 … Read more
Introduction:The MAX30102, as a highly integrated and high-performance sensor, can accurately measure human heart rate and blood oxygen saturation, widely used in wearable devices, medical monitoring instruments, and other products. (For entertainment purposes only, it’s still best to go to the hospital for reliable results.)Wiring: NANOESP32C6 MAX30102 3V3 VIN GND GND 6(SDA) SDA 7(SCL) SCL … Read more