Do you want to check what your pets are doing at home anytime using your phone? Want to remotely see if your kids are seriously doing their homework?Today, I will introduce a project that is a smart home monitoring system based on ESP32, allowing you to monitor the situation at home anytime with your phone … Read more
The Internet of Things and embedded systems are booming, providing developers with a wealth of choices. Among them, the ESP32/8266 and Raspberry Pi are two highly popular development boards that are often compared. They are both known for their low cost but have significant differences in performance, functionality, and application scenarios. This article will help … Read more
ESP32-BLE2MQTT is a powerful tool that can send data from BLE (Bluetooth Low Energy) devices to the cloud via the MQTT protocol. With the development of smart home and IoT technologies, this capability has become increasingly important. This article will detail the features, functions of ESP32-BLE2MQTT and how to use it to build your smart … Read more
Introduction In IoT applications, battery-powered devices often need to communicate with MQTT servers, but the high power consumption of WiFi connections can severely affect battery life. The ESPNow2Mqtt library was born to address this issue, utilizing ESP-Now technology to complete MQTT communication within 100 milliseconds, achieving low power consumption and efficient IoT data transmission. Architecture … Read more
NO.1 wifi+mqtt To display the corresponding data without using sensors It is necessary to prioritize obtaining and visualizing data from the network (connect to WiFi and request API) (LVGL) Several MQTT libraries were used, and finally, micropython-mqtt was chosen Reference article 《MicroPython[ESP32-S3]: Setting up MQTT connection with micropython-mqtt》 GitHub address https://github.com/peterhinch/micropython-mqtt/tree/master This is an alternative … Read more
Raspberry Pi (https://www.raspberrypi.org/) is a microcomputer board developed by the Raspberry Pi Foundation in the UK, based on ARM architecture. This board provides USB and Ethernet interfaces, allowing connection to keyboards, mice, and network cables. It has the basic functions of a PC, and the Raspberry Pi integrates Wi-Fi, Bluetooth, and a large number of … Read more
In this article, we learn how to transmit MQTT messages from ESP8266 / NodeMCU to a Raspberry Pi running an MQTT broker. Our NodeMCU will read the light levels through a light-dependent resistor (LDR) and then transmit this information to the Raspberry Pi over Wi-Fi using MQTT. NodeMCU is an open-source IoT platform. It is … Read more
MQTT Programming The Raspberry Pi, developed by the Raspberry Pi Foundation in the UK, is a microcomputer motherboard based on ARM architecture. This motherboard provides USB and Ethernet interfaces, allowing for the connection of keyboards, mice, and network cables. It has the basic functions of a PC, while also integrating Wi-Fi, Bluetooth, and a large … Read more
MQTT is a messaging protocol developed by IBM. MQTT is a lightweight publish-subscribe messaging transport protocol designed for M2M and IoT connections. Mosquitto is an open-source message broker that implements the MQTT v3.1 protocol, providing a lightweight, publish/subscribe messaging model that makes short message communication between devices simple and easy to use. If you are … Read more
4.1 Basic Concepts of Serial Communication Serial communication is a commonly used communication method, which refers to data transmission between devices through a Serial Interface. There are several basic concepts of serial communication: 4.1.1 Serial Communication Serial communication refers to the transmission of data bit by bit, transmitting only one bit at a time. Compared … Read more