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CM3-PANEL-7-POE - Preview

This is a preview of the new CM3-PANEL-7-POE LCD panel for Raspberry Compute Module 3+ that will be available on January 2021

CM3-PANEL-7-POE is an enhanced version of the popular CM3-PANEL with a larger set of interfaces.

Main features

  • 800 x 480 pixel 7 inch TFT panel with 10 points capacitive touch
  • Socket for Raspberry Compute Module 3+ normal or lite
  • MIPI connector for Raspberry Pi Camera
  • Placement for an USB WiFi module @ 2.4 GHz or 2.4/5.8GHz
  • 3 USB Host
  • 10/100 Ethernet port (POE)
  • RS485 / RS422 / RS232 port selectable by dip switch on RJ45 connector
  • 1 Relay
  • Hi quality audio out up to 384kHz 32bit
  • Filesystem safety power down by means of an always on secondary internal power source with supercapacitor
  • RTC with backup battery
  • Operating temperature: -20° - +70°
  • Input power POE 48V or direct power extended range 10V..48V

Compared features

CM3-PANEL-U CM3-PANEL-W CM3-PANEL-7-POE Raspberry Pi 3+ with 7 inch display
USB hosts 1 0 3 4
Wifi 2.4GHz no yes optional yes
Wifi 2.4/5.8GHz no no optional yes
RS485 / RS422 / RS232 no no yes no
Relay no no 1 no
Ethernet no no POE yes
Safety power down no no yes no
RTC with backup battery no no yes
Audio out no no DAC Stereo 384kHz 32bit PWM 16 bit

Power supply, reset and LAN

There are two ways to provide power to the CM3-PANEL-7-POE.

  • Using a Power Over Ethernet line (48 VDC) (Mode A and Mode B both working)
  • Using a normal Ethernet line and a separate power-in line (from 10VDC to 48 VDC)

As illustrated below are available also:

  • A cold reset button (P1)
  • A Shutdown and Restart button (P2)

Debug port interface

The debug port interface is used to have access to the Linux system console also when no other network link is available.

An USB to 3V3 serial converter is requested to wire this port to your computer and a serial terminal software like as:

The debug port will be enabled on your Linux distribution by setting:


inside the file /boot/config.txt and


inside /boot/cmdline.txt

The default serial setup is 115200,N,8,1 and the logic level is 3.3 Volt.

RS232 - RS485 - RS422 serial port

A serial port visible as /dev/ttyAMA0 is available on the RJ45 connector described below.

The physical interface used is a Max Linear SP335 IC and it can be configured via dip-switch as:

  • RS232 port at ±12 volt
  • RS485 half duplex
  • RS422 full duplex

GPIO Lines

Relay and I2C bus

ATTiny safe shutdown microprocessor

This article is under construction. If you need more info please contact me: Sergio Tanzilli -


EUR 195.00

CM3-PANEL-7-POE - Raspberry CM3+ 7 inch LCD panel with POE

CM3-PANEL-7-POE is an enhanced version of popular CM3-PANEL with a large set of interfaces

Product available on January 2021

Main features


  • Raspberry CM3+

Not Included

  • MicroSD
  • WiFi module
  • Power supply
  • Case
| Product description |

CM3-Panel technical documentation Buy on-line

Bruna Mandolino