DFPlayer Mini MP3 DF Player Module Board MP3 Audio Voice Decode Board For Arduino Supporting TF Card U-Disk IO/Serial Port/AD

Geekcreit® DFPlayer Mini MP3 Player Module MP3 Voice Audio Decoder Board For Arduino Supporting TF Card U-Disk IO/Serial Port/AD

MP3 Player Module Voice Module 4MB Voice Playback IO Trigger Serial Port Control USB Download FLash DY-SV17F, Blue

Serial Port WIFI ESP8266 Module Adapter Plate With IO Lead Out For ESP-07 ESP-08 ESP-12

3Pcs Serial Port WIFI ESP8266 Module Adapter Plate With IO Lead Out For ESP-07 ESP-08 ESP-12

JDY-40 2.4G Wireless Serial Port Transmission And Transceiver Integrated Remote Communication Module

Mini Ultra-small Size ESP-M3 From ESP8285 Serial Wireless WiFi Transmission Module Fully Compatible With ESP8266

CH340 3.3V/5.5V USB To TTL Converter Module CH340G STC SCM Download Module Upgrade Small Board Brush Board USB To Serial Port Dual 3.3V And 5V Power Output

ESP8266 ESP-12E Remote Serial Port WIFI Transceiver Wireless Module

ESP-M4 Wireless WiFi Module ESP8285 Serial Port Transmission Control Module Compatible with ESP8266

RobotDyn® USB Serial Adapter CH340G 5V/3.3V USB to Ttl-uart For Arduino Pro Mini DIY

DB9 Serial Port Adapter Connector RS232 Converter Head

Serial Port WIFI ESP8266 Module Adapter Plate With IO Lead Out For ESP-07 ESP-08 ESP-12

One Bit WS2812B Serial 5050 Full Color LED Module For Arduino

GT-38 SI4438/4463 Wireless Serial Port Module 433Mhz Replace HC-12 for Arduino

USB Serial Adapter CH340G 5V/3.3V USB to TTL-UART RobotDyn for Arduino - products that work with official Arduino boards

ESP-12E: ESP8266 Serial Port WIFI Wireless Transceiver Module for Arduino

DIY NANO IO Shield V1.O Expansion Board For Arduino

3.3V 5V USB to TTL Converter CH340G UART Serial Adapter Module STC

CJMCU CP2102 USB To TTL/Serial Module Downloader For Arduino

CJMCU-2317 MCP23017 I2C Serial Interface 16 bit I/O Expander Serial Module

NANO IO Shield Expansion Board For Arduino

CJMCU-2516 Memory Module W25Q16BVSIG Serial SPI Flash 16M-BIT

LDTR-WG0205 USB To ESP8266 Serial Adapter Wireless WIFI Develoment Board Transfer Module

PCF8574 LCD1602 Adapter I2C/IIC/TWI Serial Interface Module Board LCD Converter For Arduino

CH340G USB To Serial 5V 3.3V Break-out Expansion Module Board

Geekcreit® FT232RL FTDI USB To TTL Serial Converter Adapter Module For Arduino

0.96 inch oled IIC Serial White OLED Display Module 128X64 I2C SSD1306 12864 LCD Screen Board For Arduino

RobotDyn® USB to TTL UART CH340 Serial Converter Micro USB 5V/3.3V IC CH340G Module

USB To TTL Debug Serial Port Cable For Raspberry Pi 3B 2B / COM Port

ESP-01: ESP8266 Serial Wifi Wireless Transceiver Networking Module For Arduino