Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

Questions tagged [board-leds]

For questions pertaining to the onboard LEDs of the Raspberry Pi (PWR, ACT and ETH)

The Raspberry Pi has onboard indicator LEDs, primarily a red PWR, a green ACT, but also a green/yellow/orange ethernet LED which differ from model to model.

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How to identify a Pi

I have a stack of five Pis, each of which have a separate hostname and are on the same network. I need to physically identify each Pi from another Pi, perhaps by flashing the onboard LEDs in a recognisable manner. Any idea how I might do this from…
Nick
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Turning off LEDs on Raspberry Pi 3

I need to disable all LEDs on my Raspberry Pi 3s otherwise they interfere with the operation of my camera setup. I use Raspbian Jessie. I can successfully use the following code: echo 0 >/sys/class/leds/led0/brightness echo 0…
Alessio Sangalli
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How can I control the red LED again

I just acquired the latest Pi-3. In the Pi B+ and Pi 2 it was possible to access both the red and green LED through /sys/class/leds/led0 and /sys/class/leds/led1. After setting up the Pi 3, I have seen that I have lost /sys/class/leds/led1, which…
John Smith
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How to read the status of the Power-LED on Raspberry Pi 3 with Python

How to read the status of the Power-LED (or the rainbow square - if you like that better) on Raspberry Pi 3 to detect an low-voltage-condition in a python script? Since the wiring of the Power-LED has changed since Raspberry Pi 2, it seems that GPIO…
JRoppert
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Raspberry pi leds does not blink and the ic gets hot

I bought my raspberry pi 3 model B 4 months back. It was working perfectly but one day, when I was working on pi, all of a sudden, it stopped working. After that day, when I am trying to power it up again, none of the red and green leds are blinking…
Bansari
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Do the Ethernet lights show error codes?

My moel B is flashing all three network lights (FDX, LNK and 100) toghether about once per second. Is this an error message? There is a cable plugged in but there appears to be a break somewhere between Pi and switch. To clarify, I have found the…
Peter
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Pi 3 on-board LEDs

Can I make one of the LEDs on the Ethernet port do the same thing as the ACT led? The case I've got my Pi in, does not allow me to see the ACT led so I do not know when its okay to cut the power after shutting down the Pi. I can't seem to find out…
kyran bullard
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Control on-board led triggers from python

I know the trigger for on-board leds can be controlled from the command-line (or a script) I have a python program that I want to temporarily take over the system led blink it a little and return control to the trigger it had previously. I know I…
FoxSam12
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Turn off onboard LEDs at boot

I know very little about Raspberry Pi and Python. I've been able to turn off the LEDs in the terminal using the following command: sudo su - echo none > /sys/class/leds/led0/trigger However, I would like to incorporate that into a Python program…
WhiskyJack
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Problem with LED blink program on Pi

I am completely new to RPi and stuck unexpectedly. I am trying to create a simple python program to make my LED blink. Here are the two programs which are giving same outputs on terminal when I checked the status with gpio readall 1. import…
Rishi
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raspberry v3.0, model B read red led status

How can I read the status of the on board red led in raspberry 3.0 model B? Thank you
hmmy92
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Green Led (ACT) is blinking for mmc0 without SD card activity

The green led (ACT) on my Raspberry Pi 3 is set to mmc0 to flash on SD card activity via echo mmc0 |sudo tee /sys/class/leds/led0/trigger However, it flashes much more often (randomly every few seconds) than it should according to iotop -bktoqqq…
Frank Breitling
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Red light only when plugging Pi2 into AV-Receiver via HDMI, TV works

When I try to plug my Pi2 into my A/V receiver via HDMI and plug in my power cable afterwards, the red light lights up, afterwards the green light lights once and then nothing. When I plug in the HDMI after powering up the Pi, the Pi boots and gives…
DoktorMerlin
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Blinking PWR when not enough current available?

I'm not sure whether I've seen mention of this here before or not. Anyway, I have a B+ with max_usb_current=1 enabled so I can run an external USB drive off it. There's never been a problem with this, but usually the pi is plugged into a dedicated…
goldilocks
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Raspberry Pi 4: exchange power LED with activity LED

the default situation with the two LEDs on my Raspberry Pi 4 is as such: [situation now] Green LED: read and write activity of my SD card Red LED: Power I would like to change the the LEDs to: [desired situation] Green LED: Power Red LED: Read…
wechsler
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