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motioneye-project
Button on GPIO to turn ON/OFF wifi (for Access Point conf)
Preliminary Docs
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motionEyeOS Version
I am running motionEyeOS version: 20200606.
Board Model
I am using the following board/model: Raspberry Pi Zero W But for some tests, I use a Raspberry Pi 3 for the ethernet and usb ports (keyboard and network)
Network Connection
My motionEyeOS unit is not connected to the network but it use is own Access Point IP adress : 192.168.42.1
Peripherals
Button on GPIO Led indicator on GPIO
RTC DS1307 (because of isolated situation in Access Point)
Improvement needed
In a configuration using the Access Point, make it possible to turn ON or OFF the WiFi. This function will be very useful for use in an isolated situation (no power -> use batteries, no network). It will offer more autonomy because it decrease the need of energy.
It is then possible to use an external button on the GPIO to activate the WiFi and a led on the GPIO to indicate that the WiFi is active. WiFi should turn on at boot. Turn OFF the WiFi can be automatically with a timer. Re-turn ON the wifi or re-init the timer can be done by pressing the button.
I wrote the script (attached) for manage the button and the led, but it miss the commands for the WiFi. What would be the command lines to enable/disable WiFi ?
It will better if it avoid to reboot when the wifi turn on or turn off.
Example of the utility of this issue : With motionEyeOs, I built a standalone camera-trap to study wilds birds at nest. It use batteries, USB storage, Wifi Access Point and Real Time Clock for date/time because it's in an isolated situation. There is a success. And now, i try to decrease the consumption of energy. That is what, stop the wifi when I don't use it, could be a way. I actually need the Wifi just 5 min every 4 days to check every things.
To test the script attached, copy it in /data/etc/ simulation_WiFi_button.zip
To use the complete config use it : motioneye-config.tar.gz SSID : Button_Wifi_AP || Pass : WIFI2022 IP adress : 192.168.42.1 Hostname : Button_Wifi || user admin || no password Raspberry Pi Zero W
I find the commands to enable and disable WiFi without rebooting (modprobe brcmfmac).
The solution into the script of the button : WiFi_with_button.zip
Does it actually shut off the WiFi chip, or does it simply disable it? Big difference in what you originally requested...
I'm not sure. But during my lasts tests on RPI3, I 've noted a difference of 20 mA (average, sometime null, somtime 40 mA). Your question is very interresting. I don't know where i can find the response. But I will test all methods and continue to measure the consumption of current method by method. I will find if any methods are similars or if some of them are very more efficients.
And a next step is to start the script WiFi_with_button after booting.
It miss also some msg for the log file (button pressed detected, GPIO active, WiFi disable and enable)
Removing the driver (modprobe brcmfmac) as far as I know, doesn't 'shut the chip off', just disables / removes the driver for the chip. You could ask in the RPi forums on RPiFoundations site...
I did some tests and find a best command (to economize energy) : sudo ifconfig wlan0 down (or up). I have compared the consumption on RPi 3 with Bullseye between 3 methods (desktop/brcmfmac/ifconfig).
Do you know if a webpage show how to write a log file in motioneyeos. It could be util to know when button is pressed, if wifi have restarted, when it was stopped... ?
the path you want is /var/log/{name_of_file} it's the same as any other log file. You just need to have the utility or script do something like
echo " $(/bin/date) button was pressed" >> /var/log/button.log
This will then put " Wed Oct 12 14:33:42 EDT 2022 button was pressed" in a file called /var/log/button.log
I replace ifconfig by ip link. In MotionEyeOs, it will work better. Also, ifconfig is now old and replace by ip link.
So i use : ip link set dev ap0 down and ip link set dev ap0 up.
The wifi switch correctly and i can connect the computer to the AP of MotionEyeOS-RPiZero.
But, after to switch up, it's impossible to connect in SSH (putty) or in HTTPs (on web brower), no response...
I record in a specific log file the answer of ip a after each command. I obtain exactly the same before to switch down and after to switch up.
example (after sitch up the wifi) : 3:ap0 <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether b8:27:eb:aa:36:2c brd ff:ff:ff:ff:ff:ff inet 192.168.42.1/24 brd 192.168.42.255 scope global ap0 valid_lft forever preferred_lft forever inet6 fe80::ba27:ebff:feaa:362c/64 scope link tentative valid_lft forever preferred_lft forever
Do you think some services need to be restarted ? Do you think I need to restart the Access Point ?
I didn't find any command to have the list of services. I wanted to compare before and after.
You should be able to connect to http://ip_address with a web browser. I am not sure why you couldn't. Once in the WebGUI, you can turn on SSH if you forgot to turn it on with a file called ssh or ssh.txt in the /boot partition when you created the SDCard.
ip a
gives you all active IP info
netstat -tulpn
gives you all active TCP/IP ports and statuses. You are looking for port 80, this line specifically:
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 645/python
Unfortunately in mEOS, the command
system motioneye status
returns Usage: /sbin/service {start|stop|restart}, status was forgotten... and systemctl is not installed...
Excuse me if I was not clear.
When I use the command ip link set dev ap0 down, the wifi switch down, as i want (economy of energy).
Whe I use the command ip link set dev ap0 up, the wifi switch up correctly.
If I compare the answers of the commands lines ip a and 'netstat -tulpn', before to switch off the wifi and after to switch on, they are exactly the same.
So, normaly, all are done. When I connect my computer to the AP-wifi, it's ok, that's right. But it's impossible to connect with url : 192.168.42.1 on the web browser and impossible to connect in SSH. So I reboot the system, and that's fine, I can connect the computer to the AP-wifi and open MEO in the web browser or access to it in SSH.
I'm sure MOE does'nt reboot after the switch OFF/ON of the wifi because, I watch the screen of MOE with a screen directly connected on HMDI.
Then you can add the command
service motioneye restart
after the command that restarts your wifi.. You might need a 5-10 second delay for the wifi to come all the way back up, though which would be:
sleep 10 && service motioneye restart
After the command service motioneye restart. It answer Stopping motioneye : done and Starting motioneye : done.
But there is'nt possible to open MOE in web-browser or SSH terminal.
If you run
netstat -tulpn | grep ":80"
what does it report?
My example: [root@meye-4cec78b8 ~]# netstat -tulpn | grep ":80" tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 651/python tcp 0 0 0.0.0.0:8081 0.0.0.0:* LISTEN 4367/motion
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1079/python tcp 0 0 0.0.0.0:8081 0.0.0.0:* LISTEN 1092/motion
I've checked the log files
What seems to be done 👍
in dmes.log, I can read : IPv6 ADRCONF (NETDEV_CHANGE) link becomes ready.
in hostapd.conf, I can read : ap0 interface enabled
not done 👎 in message.log, I can read : Oct 15 14:57:54 daemon.info hostapd : ap0 : STA 74:c6:3b:...d5 IEEE 802.1 : dissociated
But on MEO from MEO, i can ping itself well.
I'm not sure it's an interesting indication...
Can you disconnect whatever phone or tablet you are using, and re-connect? Not the "automatic connect"...
Yes I've tested with my phone (Android), my Ipad, my laptop (ubuntu) and my computer (windows). Disconnect/reconnect/forget this network, ...