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Questions tagged [activity-led]

The green activity LED blinks on both read and write activity on the SD card. On newer models it is connected to a GPIO expander , which is connected via I²C to the SoC.

5
votes
2answers
2k views

Can't turn on ACT LED on baremetal Pi3

I'm trying to run some bare-metal code on my raspi 3. This is my first time doing any sort of bare-metal programming, so first things first I want to turn on my ACT led as a kind of hello-world type ...
2
votes
1answer
778 views

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 ...
2
votes
1answer
32 views

Normal Work of RPi 3B+

I am newbie and i want to understand watching only on indicators, is Rpi 3 B+ work quite well? I mean, are green and red lights should glowing both permanently together or red light can glows ...
1
vote
1answer
45 views

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 ...
1
vote
1answer
479 views

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 ...
1
vote
1answer
464 views

Raspberry Pi 3 will not load SD Card

I have a very strange problem and have gone through 2 pi's atm. I have Raspberry Pi 3, I put an OMV imageon it [1]. The first time I boot up the Raspberry Pi it outputs and has a Kernal error: I try ...
0
votes
1answer
180 views

raspberry pi no rainbow screen

I have an another problem. My RPi (3 model B+) not booting. No ACT led, no rainbow screen, only PWR led. Here is what i checked: - Power supply (Raspberry Pi Universal Power Supply 2.5A, 5.1V Micro ...
0
votes
2answers
183 views

Send PWM signal from Raspberry Pi 3 BEFORE boot

I am using my raspberry pi 3 to run some services. When someone powers on the Raspberry I want to use RGB LEDs to indicate the status instead of using a LCD screen to output messages. The LEDs I plan ...
0
votes
0answers
40 views

Why the green LED is not blinking properly on Raspberry Pi 3 Model B running Arch Linux ARM from USB?

After installing Arch Linux ARM on Raspberry Pi 3 model B, everything is working as expected but the green LED that indicates the SD card read write activity. The LED just blinks every second for 0.1 ...
0
votes
0answers
89 views

Raspberry pi not booting nor screen showing any colors

So I just took off my raspberry pi and clean it with wet tower and dry it completely off. When i then boot into it, it was completely normal then I started to notice that the green light is not ...