NEC RPI3CM-2 Raspberry Pi Compute Module Setup Guide

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3.4 Software control via IR Remote

An IR Remote can be used to control software running on the Compute Module, such as a media player.

IR Remote control signals are received via the display’s built-in IR remote sensor or via an optional

external KT-RC2 sensor.

This feature can be used in two ways:

• As a CEC (Consumer Electronics Control) device

Specific buttons on the NEC IR Remote will perform actions, such as Stop, Play, Next, Previous,

etc., on CEC enabled software on the Compute Module. The display is responsible for receiving

and decoding the IR Remote signals, and then forwarding them on to the Compute Module as

standard CEC commands.

Only the NEC IR Remote can be used and CEC support must be enabled on the display and in the

Operating System on the Compute Module. See Figure 3.4-3: Supported CEC buttons on the NEC

IR Remote.

The buttons used for CEC commands are dual-function on the NEC IR Remote. When the

display’s OSD is active (being displayed) the buttons will perform display related functions.

When the OSD is not active the buttons will perform CEC functions. Press the EXIT button on the

IR Remote to exit and deactivate the OSD.

See sections 8.15 and 8.16 for more information.

• As a generic IR receiver

Demodulated raw IR signals received by the IR remote sensor are passed to the Raspberry Pi

Compute Module via GPIO 18. Packages such as lirc can be used to decode the raw IR signals.

IR Remotes other than the NEC IR Remote, such as a standard MCE/RC6 type, can be used as

long as they use a 40 KHz carrier. See sections 7.4 , 7.5 , and 8.5 for more information.

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NEC RPI3CM-2 Edition Raspberry Pi Compute Module