Control your Arduino projects from anywhere in the world with a free app thanks to the Tuya IoT interface! Connect the Module of Tuya IoT Interface to your Arduino using the 4 included male wires. Then, connect your Arduino to the Cloud IoT Tuya simply by installing the Tuyav library, which is compatible with ATmega Chipsets (or AVR Platform). This will allow you to connect to the Tuya app via WiFi and allow you to control up to 5 outputs.

This relay shield is capable of controlling 4 relays . The maximum switching power can be 360VA / 90W . It can be controlled directly by the Arduino by means of digital IOs digital with external power of 9v . With integrated xbee socket and APC220 socket, it can be controlled wirelessly via Xbee / bluetooth / APC220 . Make it an ideal solution for home automation and robotics.

This DTMF Shield is a Dual-tone multi-frequency signaling module decoder for Arduino With it's audio connector you can decode the crazy funny noises common phones make.

This board is the combination of 3 extremely interesting products: a ESP32 Module with WiFi and Bluetooth, a oLED Display and a battery charging and charging system Lithium-Ion 18650.

The upgraded Input Shield for Arduino includes a two-axis mini-joystick (with moment switch) as well as four colored buttons (red, yellow, blue, green). The reserved interface of the APC220 Radio Data Module (SKU: TEL0005) and the Xbee interface are designed to make it easy to perform the wireless remote control button controller. The shield can easily be stacked on top of your Arduino boards. It can also connect with OLED2864 and OLED9664.

This ENC28J60 RJ45 Ethernet Shield is ideal for enabling your Arduino Nano with an Internet connection.

Do you want to program your RGB LED strip to be a little more "rhythmic" or "unpredictable"? This RGB LED Strip Shield contains all the necessary components to create a super cool RGB LED project with your Arduino.

WiDo is a WIFI IoT Node development board compatible with Arduino.

Shield of relays for Arduino, with 2 channel mechanical relays and with 2 channel MOS switch , providing an easy way for applications low and high voltage control. 

Shield XBee SparkFun

This version of the Ethernet Shield is not only compatible with Mega 1280 and 2560, but also provides a Micro SD card slot for read / write

The HC-12 433MHz Transceiver is a wireless communication Module, which is based on the RF SI4463 chip, has a built-in microcontroller and can be configured by AT commands, the maximum output power is 100mW (20dBm) and the receiver sensitivity differs from: 117dBm to -100dBm, depending on the transmission speed. Accepts 3.2V - 5.5V and can be used with 3.3V and 5V UART voltage devices.

Gravity: IO Expansion Shield for Arduino V7.1

An Controller Module of XH-M603 Charge, very easy to use, learn more about it here at ElectroFun!

The motor shield is based on the L298 , it is a double complete bridge driver designed to drive inductive loads, such as relays, solenoids, DC and stepper motors. 

An ESP8266 Wifi Shield for Arduino.