Linked Questions

12 votes
4 answers
19k views

Watchdog on the RPi4

Does the Raspberry Pi 4 have a hardware watchdog timer like the RPi3 does? If it does, which kernel module should I load in order to use it? I'm running Raspbian Buster, kernel 4.19.93-v7l+ Thanks.
tlqmj's user avatar
  • 159
8 votes
4 answers
9k views

WatchDog Daemon not restarting PI after fork bomb

I have tried to run the WatchDog Daemon using the tutorial found at http://binerry.de/post/28263824530/raspberry-pi-watchdog-timer So basic process I ran through to get WatchDog up and running is: 1....
Richard's user avatar
  • 471
4 votes
6 answers
17k views

How to remotely turn off the cooling fan of an already software shut down Rpi?

I just bought a case with fa , as pi 4 is not working great without it. Now temperature is low, but as I have it in my room, I would like to turn it off while sleeping. My fan is: https://www.amazon....
Juliatzin del Toro's user avatar
1 vote
0 answers
3k views

SIM7600 4G HAT Rpi3B+ Setup Problem

I am trying to get a SIM7600E-H-4G-HAT running on my Raspberry Pi 3B+, but it is not working. Here is what I've done so far: Inserted my SIM-Card, connected the antenna to Main, connected the entire ...
user1511417's user avatar
2 votes
2 answers
2k views

how do I automatically power off the raspberry pi and cut power every night and then power it back on each day?

Background I'm a student working on research project to develop a remote wireless sensor network of data loggers. Each data logger (aka node) is going to be retrofitted to a bird feeder that reads ...
Rangertech's user avatar
2 votes
2 answers
1k views

Is it safe to connect a GPIO Pi pin directly to a 3.3V Arduino pin, and vice versa?

I have Pi4 on a UPS and a 3.3 volt Arduino (Nano 33 IOT) supplied without a UPS protection. I am designing a system where Pi monitors a 3.3V Arduino pin to know if there is a power outage (and shut ...
kb__'s user avatar
  • 43
2 votes
1 answer
2k views

Are there reliable methods for connecting/reconnecting to multiple bluetooth LE devices to a raspberry Pi?

I've been trying to get a bluetooth LE IoT set up to work with multiple bluetooth LE devices that periodically turn on and transmit. I'm using code similar to https://engineersportal.com/raspberry-pi-...
RyanCheu's user avatar
  • 121
2 votes
1 answer
1k views

USB modem ppp0 automatic connection improvement

I have a USB modem (Huawei E1552) connected a RPi running Raspbian Stretch. It is connected at remote location that needs persistent internet. For example, for ssh or pushing code remotely. I have ...
Tony Baloney's user avatar
0 votes
0 answers
2k views

Green light always on after a while for Raspberry pi 3 Model B V 1.2 2015

I boot the raspberry pi correctly, the red light is on (solid light) and the green light blinks. After a while, (it can be few hours or a couple of days) the green light stays solid and it does not ...
chrisis's user avatar
0 votes
0 answers
2k views

How to track why two RPi's are constantly "freezing"...?

I have two RPi's, one 3B+ and one 4 8GB. Both run updated Raspbian with Node-Red, VNCServer, No-ip DUC and have SSH enabled. No mouse or display connected to any of them. The 3B+ serves as the "...
Anders's user avatar
  • 101
1 vote
1 answer
1k views

How to configure the watchdog

I tried to configure the watchdog on several Pi's with the latest Raspbian by adding "dtpatam=watchdog=on" to /boot/config.txt and adding a file called /etc/watchdog.conf with: watchdog-...
WhyNine's user avatar
  • 51
0 votes
0 answers
830 views

Watchdog is running?

I need to enable Watchdog functionality on my RPi. I've followed this guide: https://medium.com/@arslion/enabling-watchdog-on-raspberry-pi-b7e574dcba6b No errors were reported, I installed everything ...
Daniel's user avatar
  • 259
0 votes
0 answers
624 views

Hardware watchdog during reboot

I'm creating a prototype of a Raspberry Pi 3B+ that uses Mender as the update manager. My goal is that if the Raspberry Pi is stuck somewhere in the boot process (Corrupted Kernel that cannot even ...
fnx_qt's user avatar
  • 1
1 vote
2 answers
217 views

Slight dip on the GPIO 5v line when LEDs are on

I have my raspberry pi set up to do two main things: control 16 LEDs via 16 transistors each connected to an out pin. The LEDs are collectively fed the 5V from the GPIO. power a chip also on the 5V ...
schmop's user avatar
  • 179
1 vote
0 answers
197 views

Strange segfault after several hours of running program

I created a program fairly closely related to hello_pi/hello_video.c. And for some reason after several hours of running the program I get these very strange segfaults that I cannot for the life of me ...
ktb92677's user avatar
  • 141

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