Hi, I've a problem with my raspberry3, for the second time (each time, about 2 weeks after last reboot) I have a frozen, the ping was replying but seems no TCP.. no SSH, no Node Red, no telnet, etc.
At second time seems things get worst, the log contains the same amout of nul chars in syslog but on second time not only TCP was affected.. also Node red stopped working (I've some modules which are indipendent from network, they read status of I2C I/O (buttons) and activate I2C PWM (I used it to drive relay)..
I'm out of home, I couldn't reach Raspberry to solve/reboot, so I asked someone to interrupt power for a while and after reboot problem was solved.
I discovered what happened in syslog:
Feb 19 17:00:00 raspberrypi kernel: [1051671.413479] Under-voltage detected! (0x00050005)
I put it at 5,05 volt.. to correct it I'll try to rise a bit, someone knows which is the good value? I don't want to excedd, I think till 5,5 it will be ok, but maybe better 5,3..
Anyway, I need something who testing the main services and evenually reboot the Raspberry, is it possible to do with Node Red? I searched and found a deprecated Watchdog module, then in another topic a gu asked and suggested to execute a sudo reboot.
Can I test every x seconds for example the 127.0.0.1:22? would be good also the router 192.168.1.1 on port 80, and eventually execute a sudo reboot?
I've no really good idea if this is a good solution, maybe I woud need something which runs at higer level (kernel) and reboot if it goes into panic, maybe this is my case because when it happens I've 2 rows in syslog full of null chars.. seems also kernel is not responding, or the log service, may you suggest something or recomend something else?
Thank you a lot!