DFRduino Nano (Arduino Nano Compatible) - DFRobot

Arduino Nano ESP32 S3 Review: A Powerful Upgrade for IoT Projects - DFRobot

Beetle CM-32U4 - ATmega32U4 - compatible with Arduino Leonardo - DFRobot DFR0816 Botland - Robotic Shop

DFRobot Mega 2560 V3.0 (Arduino Mega 2560 R3 Compatible)

Gravity: Nano I/O Shield — Arduino Online Shop

Buy Bluno Nano and BLE Bluetooth 4.0 - compatible Botland - Robotic Shop

Beetle Board - Compatible with Arduino Leonardo - ATmega32U4 - DFRobot

DFRduino UNO R3 - Compatible with Arduino Uno - DFRobot

Arduino comapatible shield to convert UART/Serial protocol to RS485 protocol. Integrates a standard RS485 port, a mini RS485 port, RS485 headers. Automatic and manual transceiver mode switch. 16 digital and 6 analog IO port and power. The DFRobot RS485 Shield for Arduino is an industrial standard for long distance, anti-interferrence and reliable communication.

DFRobot RS485 Shield for Arduino

DFR0003 by DFRobot, Embedded System Development Boards and Kits

Introduction The Dreamer Nano V4 is a surface mount breadboard embedded version of the ATMEGA 32U4 with integrated Micro USB. It has everything that Arduino Leonardo has (electrically). Physically, it is just missing power jack to save space. Using the ATmega32U4 as its sole microcontroller allows it to be cheaper and simpler.