GitHub

How to connect an Arduino to a real serial port (RS232)

For the challenge, I wanted to send data from my computer's real serial port (RS232 9-pin connector). For that, I created an adaptor circuit because the voltages on a computer serial port are ...
GitHub

yracine/DSC-Integration-with-Arduino-Mega-Shield-RS-232

DSC Alarm interface to SmartThings. Able to arm/disarm, monitor zone status and trigger the panic alarm. The IT-100 interface is connected to the communication and power lines of the DSC alarm panel ...
Hackster

A Single Arduino Uno with 14 RS-232 Ports

A single Arduino Uno/Mega can carry up to 14 RS-232 boards. Each board is distinguished by ID, which is set via a DIP switch. If you are a beginner, you can get started with Arduino Tutorials for ...
Design News

Who'd Thunk It? Arduino and PLCs Hook Up Via RS232 and Modbus

In researching industrial controls projects for my “Introduction to PLCs” and “Advanced Programmable Logic Controllers” courses that I teach at a local Alabama community college, I was quite surprised ...
note

Ethernet シリアル変換機

わけあってRS232とEthernet変換機が必要だったんですが、買うと結構高いので、ちょうど我が家に眠っていたArduino Nano Everyを使って作ってみました。実際は、ちょっと単なる電文のやり取りじゃなくて、ちょっとだけ文字列操作が必要だったんです。 GitHubに ...
blog.csdn

RS232转TTL串口模块实战：MAX3232原理、Arduino通信与调试全解析

原创 最新推荐文章于 2026-09-15 15:50:57 发布 · 300 阅读 手头攒了一堆传感器模块，总想挨个玩一遍，这是很多嵌入式爱好者的共同状态。网上流传的“37款传感器”更像是一个入门清单，Arduino的生态远比这丰富。今天要动手折腾的，是连接“旧世界”与“新世界 ...
blog.csdn

ModbusMaster 项目常见问题解决方案

ModbusMaster 是一个用于 Arduino 的开源库，旨在使 Arduino 能够作为 Modbus 主站与 Modbus 从站进行通信。该项目支持通过 RS232/485 接口（使用 RTU 协议）与 Modbus 从站设备进行通信。ModbusMaster 库提供了多种 Modbus 功能码的支持，包括读取和写入线圈、离散输入、保持寄存 ...