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How-To LED

Description

The Pi-Tron CM4 has a few LEDs onboard to show or signal the user different conditions and states. Below in the How-To section is an image showing the positions of the LEDs together with a reference name. The name of each LED is listed in a table below the image describing the function of the respective LED. This How-To is more of an overview of the available LEDs then an actual How-To.

Requirements

  • No Requirements

How-To

Overview of all LEDs on the Pi-Tron CM4. The following image shows the reference name and location of each LED on the Pi-Tron CM4.

pi-tron-cm4-top-leds

Use the following table to look up each LEDs name from the above image.

Name Function Description
L1 Power 1,8 volts CM4 OK
L2 Power 3,3 volts CM4 OK
L3 Power 5 volts
L4 Power 3,3 volts
L5 USB Power 1 OK
L6 USB Power 2 OK
L7 Power-LED (PWR)
L8 USB-Hub active
L9 USB-OTG active
L10 USB-OTG reset / Device Mode
L11 USB-OTG USB ext. power
L12 DIO1 led
L13 DIO2 led
L14 DIO3 led (backside)
L15 DIO4 led (backside)
Lxx CM4 activity LED

Restrictions

  • Note: Not all LEDs are available on all models. For example, a Pi-Tron CM4 version without DIO also has no DIO LEDs.