I have several Pi's that run 24/7 and they will automatically reconnect when the wifi is available (I deliberately have my wifi networks turn off at night when there is no need for them to be on). I have found the below to be 100% reliable. I am using static IP on my Pi's but it should work fine with DHCP as well:
sudo nano /usr/local/bin/checkwifi.sh
The default dhcpcd is reliable and will automatically connect if correctly configured. See How to set up networking/WiFi
Raspberry Pi OS DOES NOT use networking.service - unless you misconfigure it.
You can use NetworkManager, but it is difficult to configure manually, and the GUI networking tool in Raspbian won't work. It is no more reliable than dhcpcd. ...
I would put an ESP32 or similar in between to Pi and HX711.
You could build some functions (e.g. tare) into the Arduino so it closer to the weigh scales than the Pi so you can check the device. Note load cells can drift over time if constantly under load so you may need to introduce check and calibration processes.
The HX711 has an Arduino library that ...
If you want to sniff your neighbors WiFi, the wireless chip must support monitor mode. The built-in WiFi on a Raspberry Pi does not support it. So you are without luck. You can check it with:
rpi ~$ iw list
and look for Supported interface modes: in the longish output. Have a look at Enable monitor mode for further information about this.
You want to have a client WiFi connection to an uplink access point. The problem is, that a Raspberry Pi does not support bridging a WiFi interface used for a client connection due to a hardware limitation. For further information about this look at Raspberry Pi WiFi to Ethernet Bridge for a server?.
But as noted there you can use proxy arp as a workaround ...
The dmesg log shows that the driver is loaded for a BCM4345/6 chip. It may be worth you checking this on your board as the RPT/RPF have not stated what this chip is as far as I know (and it's not in the certification documentation).
This note from Kali Linux here states that you can get:
on-board wifi monitor mode & frame injection support