Template: 13.3inch PiPad C4 Guide

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Write Raspberry Pi OS

hdmi_group=2
hdmi_mode=82
hdmi_cvt 1920 1080 60 6 0 0 0
  • Save and insert the micro SD card to Raspberry Pi.
  • Connect the Magic mirror to network and power on Raspberry Pi.
  • After booting, you can access Raspberry Pi via SSH/VNC, or directly connect the keyboard and mouse.

Check the USB Audio Card

  • Test the sound output device
aplay -l
  • Test the sound input device
arecord -l

USB2.0

To reduce consumption, USB interfaces are disabled in CM4 by default. If you need to use USB ports, please add the following line to config.txt file.

dtoverlay=dwc2,dr_mode=host

Then reboot the CM4. If you use the newest Bullseye image, the USB2.0 is set to OTG mode by default, and it occurs the error in CM4:

config failed, hub doesn't have any ports! (err -19)

To remove the errors, you can remove the line otg_mode=1 from config.txt file and add the line:

dtoverlay=dwc2,dr_mode=host

13.3inch PiPad C42.png

kepp display lighting all the time

  • Modify lightdm.conf
sudo nano /etc/lightdm/lightdm.conf
  • Find the line "Xserver-command" below [SeatDefaults] section and change it from
#xserver-command=X

to

xserver-command=X -s 0 -dpms
  • -s # – set screen saver not enabled
  • dpms turn off power saving management
  • Then save and reboot
sudo reboot

RS232

To use the RS232 interface, please modify the config.txt file:

sudo nano /boot/config.txt

Add the following line the file and save

dtoverlay=uart3

RS485

To use the RS485, you need to enable the serial port of PI

sudo raspi-config

Choose Interface Option -> Serial -> No -> Yes, then reboot

Keys description

13.3inch-HDMI-LCD-H-Manual-02.jpg

  • 1: Open or Close LCD display. If you don't need the LCD for long time, you can use this button to reduce consumption
  • 2: Direction button
  • 3: "OK" function
  • 4: Open menu and "Return" function