The KEYFOBP2 is a dual purpose I2C Expansion port and Key Fob Receiver/Decoder shield 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, Raspberry Pi 3 and Pi2 I/O lines are asserted High for the duration of the remote button press. Raspberry 3 and Pi2 I/O lines return to a low state when the remote control button is released. Includes RP-SMA Antenna.
The On-Board LICAL Key Fob Decoder is Mapped to the following Raspberry Pi 3 and Pi2 Pins:
Key Fob Button 0 is Connected to Raspberry Pi 3/Pi2 Pin 29 – GPIO5
Key Fob Button 1 is Connected to Raspberry Pi 3/Pi2 Pin 31 – GPIO6
Key Fob Button 2 is Connected to Raspberry Pi 3/Pi2 Pin 33 – GPIO13
Key Fob Button 3 is Connected to Raspberry Pi 3/Pi2 Pin 35 – GPIO19
Key Fob Button 4 is Connected to Raspberry Pi 3/Pi2 Pin 37 – GPIO26
Key Fob Button 5 is Connected to Raspberry Pi 3/Pi2 Pin 40 – GPIO21
Key Fob Button 6 is Connected to Raspberry Pi 3/Pi2 Pin 38 – DPIO20
Key Fob Button 7 is Connected to Raspberry Pi 3/Pi2 Pin 36 – GPIO16
The KEYFOBP2 includes a level-shifted +5V I2C Expansion port for the Raspberry Pi 3 and Pi2. The KEYFOBP2 acts as a gateway to the entire NCD I2C product line, allowing limitless expansion possibilities. This expansion could be the single most significant expansion for your Raspberry Pi 3 ever made simply because of its broad expansion possibilities. Integrated 4.7K pull-up resistors make it an ideal I2C master device.
This I2C expansion port is compatible with our entire range of I2C devices, including relay controller, sensors, and various Mini Modules, making expansion of the Raspberry Pi 3 and Pi2 quick and easy, regardless of your application requirements.
NOTE: Key Fob remotes are security encrypted, and must be paired with the controller prior to use. This expansion includes a pass-through connection for the Raspberry Pi 3 and Pi2 GPIO Header. However, this expansion makes extensive use of the Raspberry Pi 3 and Pi2 GPIO Header, and may render the GPIO port unusable for many expansions. Please exercise extreme caution when plugging other expansions into the pass-through header.