Arduino Uno Ultimate I2C Shield with Key Fob Receiver, 3-Digit LED Display, Buzzer and Wireless Socket

  • Universal Communications Shield for Arduino Uno
  • 1, 2, 3, 4, 5, 8-Button 418/433MHz Key Fob Remote Control Compatible
  • Up to 750 Foot Range with 8-Button Key Fob
  • Key Fob Pairing Button and Valid Key Fob Reveive LED
  • I2C Expansion Port and XBee Socket
  • Programmable Buzzer & 3-Digit LED Numeric Display


The ACOM offers a power-house of communication options for the Arduino Uno platform.

Special features of the ACOM include a user-programmable buzzer, an I2C Expansion port, an Digi Wireless Socket, I2C programmable 3-Digit Hexidecimal LED display, Universal 12V 100ma Open Collector Output, and a Key Fob Receiver with LICAL Decoder.

The ACOM Key Fob Receiver/Decoder shield is compatible with Linx Technologies MS Series Key Fob Transmitters operating at 418/433MHz (1, 2, 3, 4, 5, 8-Button Transmitters Available Separately). This device is capable of receiving button presses from a remote control up to 750 feet away (when using the 8-Button remote). When a remote control button is pressed, the on-board Valid LED illuminates. In addition, Arduino I/O lines are asserted High for the duration of the remote button press. Arduino I/O lines return to a low state when the remote control button is released. Includes RP-SMA Antenna.

Integrated I2C expansion port is compatible with our entire range of I2C devices, including relay controllers, sensors, and various Mini Modules, making expansion of the Arduino quick and easy, regardless of your application requirements.
Wireless Socket is Connected to Arduino UART Pins D0 and D1

The On-Board LICAL Key Fob Decoder is Mapped to the following Arduino Pins:
Key Fob Button 0 is Connected to Arduino D2
Key Fob Button 1 is Connected to Arduino D3
Key Fob Button 2 is Connected to Arduino D4
Key Fob Button 3 is Connected to Arduino D5
Key Fob Button 4 is Connected to Arduino D6
Key Fob Button 5 is Connected to Arduino D7
Key Fob Button 6 is Connected to Arduino D8
Key Fob Button 7 is Connected to Arduino D9
Arduino D10 and D11 are not used.
Open Collector Output is controlled by Arduio D12
Buzzer is controlled by Arduio D13.

Key Fob remotes are security encrypted, and must be paired with the controller prior to use. Includes Key Fob Antenna and I2C Cable. Key Fob remote controls sold separately.


This adapter provides a general-purpose I²C port, compatible with our complete line of I2C devices.  Control relays, monitor current, read just about any kind of sensor you can imagine.

Key Fob remote control transmitters can be found here.

Trademark Disclosure:

This device is designed, and manufactured by XBee is a registered trademark of Digi International. All other products or name brands are trademarks of their respective holders.



This is a general purpose I²C device compatible with all computing platforms and IoT technologies, including Raspberry Pi, BeagleBone, Arduino, Particle, BridgeX5, and many more.  All devices support a strict +5V I²C Bus standard.

Arduino Nano and Micro Interfaces:
Plug this Device into the Arduino Nano I²C Shield
Plug this Device into any Arduino Nano Master Device
Plug this Device into any Arduino Micro Master Device
Plug this Device into the Arduino Uno Interface Adapter

ESP8266 IoT Interfaces:
Use our ESP8266 Module and the PEI2C Interface Adapter
Use our ESP8266 Adapters for Adafruit and Huzzah

Onion Omega 1 & 2 IoT Interface:
Use our Onion Omega Adapters

Raspberry Pi Interfaces:
Use the Raspberry Pi I²C Interface Adapter
Use the Raspberry Pi 2/3 I²C Interface Adapter
Use the Raspberry Pi Zero I²C Interface Adapter

Particle IoT Interfaces: 
Plug this Device into the Particle Photon I²C Shield
Use as Expansion for any Particle Photon Device
Use as Expansion for any Particle Electron Device
Note: All devices above are compatible with Bluz Bluetooth Interface

Pycom IoT Interface:
Plug this Device into the WiPy I²C Shield

BeagleBone Interface:
Use the BeagleBone I²C Interface Adapter

Windows 8/10 PC Interface:
Use the Bridge Series Controller


Mechanical drawing
Wiring diagram