OrangePi Zero3: Infrared receiving test

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Chapt 3. Instructions for use of Debian/Ubuntu Server and Xfce desktop system

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Chapter 3 contents

3.13. Infrared receiving test

1) First, you need to insert the 13pin expansion board into the 13pin interface of the Orange Pi development board. After inserting the expansion board, the development board can use the infrared receiving function

Img 3.102

2) Install ir-keytable infrared testing software

orangepi@orangepi:~$ sudo apt update
orangepi@orangepi:~$ sudo apt-get install -y ir-keytable

3) Then execute ir-keytable to view the information of the infrared device

a. linux5.4 system output is as follows

orangepi@orangepi:~$ ir-keytable Found /sys/class/rc/rc0/ (/dev/input/event1) with:

Driver: sunxi-rc-recv, table: rc_map_sunxi lirc device: /dev/lirc0 Supported protocols: lirc nec Enabled protocols: lirc nec Name: sunxi ir recv bus: 25, vendor/product: 0001:0001, version: 0x0100 Repeat delay = 500 ms, repeat period = 125 ms

b. The output of the linux6.1 system is as follows


orangepi@orangepi:~$ ir-keytable
Found /sys/class/rc/rc0/ with:
Name: sunxi-ir
Driver: sunxi-ir
Default keymap: rc-empty
Input device: /dev/input/event5
LIRC device: /dev/lirc0
Attached BPF protocols: Operation not permitted
Supported kernel protocols: lirc rc-5 rc-5-sz jvc sony nec sanyo mce_kbd rc-6 sharp
xmp imon rc-mm
Enabled kernel protocols: lirc
bus: 25, vendor/product: 0001:0001, version: 0x0100
Repeat delay = 500 ms, repeat period = 125 ms

4) Before testing the infrared receiving function, you need to prepare an infrared remote controller dedicated to Orange Pi, other remote controllers do not support it

Img 3.103

5) Then enter the ir-keytable -t command in the terminal, and then use the infrared remote control to press the button against the infrared receiver of the Orange Pi development board to see the received key code in the terminal

a. linux5.4 system output is as follows

orangepi@orangepi:~$ sudo ir-keytable -t
Testing events. Please, press CTRL-C to abort.
 1598339152.260376: event type EV_MSC(0x04): scancode = 0xfb0413  1598339152.260376: event type EV_SYN(0x00).
 1598339152.914715: event type EV_MSC(0x04): scancode = 0xfb0410

b. linux6.1 system output is as follows


orangepi@orangepi:~$ sudo ir-keytable -c -p NEC -t
Old keytable cleared
Protocols changed to nec
Testing events. Please, press CTRL-C to abort.
 202.063219: lirc protocol(nec): scancode = 0x45c
 202.063249: event type EV_MSC(0x04): scancode = 0x45c
 202.063249: event type EV_SYN(0x00).

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