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I have many installations—around 2,000—that need to run 24/7, 365 days a year. Power relays and RS485 devices are connected to the board.
Occasionally, the system freezes, and the system LED (GPIO44) turns off. The only way to fix it is to physically cut the power and turn it back on.
This can happen after a week or after three months; I can't figure out the reason.
My research suggests a power supply issue or a voltage drop, but I would like to know if there is a way to resolve this state. Whether it is a software or power supply issue, it is as if the board gets stuck during startup.
Do you have any advice?
my system:
cat /proc/version
Linux version 4.14.81 (root@c34dd7d43957) (gcc version 7.3.0 (OpenWrt GCC 7.3.0 r0+7498-730f2344ba)) #0 Fri Nov 25 04:10:54 2022
Thanks.
While OpenWrt is a single user system, you can create additional users so you don't have to disclose the root user password. You can add the user by editing /etc/passwd and /etc/shadow or you can install the useradd package:
opkg install shadow-useradd
Now add a new user named "admin", but we don't want them to have shell access:
useradd admin -d /var -M -s /bin/false -p mytemporarypassword
The password is added in cleartext so you need to change it using the command:
passwd admin
Follow the prompts to set your password then you can confirm the new user has been added as required:
cat /etc/passwd
cat /etc/shadow
Since OnionOS uses ubus via rpc we need to add the user to the rpc user list. The configuration file is /etc/config/rcpd, but you can use uci commands to add the user:
uci add rpcd login
uci set rpcd.@login[-1].username='admin'
uci set rpcd.@login[-1].password='$p$admin'
uci add_list rpcd.@login[-1].read='*'
uci add_list rpcd.@login[-1].write='*'
uci commit rpcd
The username must match the username we just created and the structure of the password field causes the rpc daemon to use the system password we just created.
The "read" and "write" fields is set to an asterisk indicating that the user will have unrestricted access, the same as the root user.
You can confirm the new user had been added using a uci command:
uci show rpcd
rpcd.@login[0]=login
rpcd.@login[0].username='root'
rpcd.@login[0].password='$p$root'
rpcd.@login[0].read='*'
rpcd.@login[0].write='*'
rpcd.@login[1]=login
rpcd.@login[1].username='admin'
rpcd.@login[1].password='$p$admin'
rpcd.@login[1].read='*'
rpcd.@login[1].write='*'
Now restart the rpc daemon:
service rpcd restart
You can now login to OnionOS with the same functionality as the root user has, but the user has no console access.
@cyberai pls try running the checkCamera.py Example Python Program and posting the command line output and screenshots of the output.
This will give us a better idea of what's going on.
