to Pi's setup the same...once see's the network and one does not.

[cchisholm]

I feel like I'm playing whack-a-mole here.

I have two RP3's and I am trying to set them up identically. One will be used to run PRONTERFACE for a 3D printer and the other for bCNC.

In both, /etc/network/interfaces has...

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# interfaces(5) file used by ifup(8) and ifdown(8)

# Please note that this file is written to be used with dhcpcd
# For static IP, consult /etc/dhcpcd.conf and 'man dhcpcd.conf'

# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d

and /etc/dhcpcd.conf has ...

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interface wlan0
static ip_address=192.168.0.211/24
static routers=192.168.0.1
static domain_name_servers=192.168.0.1 8.8.8.8

added at the bottom (different IP on each though ).

One works and the other shows networking as unavailable (click the icon says "no wirteless interfaces found")

I have looked through raspi-config trying to find something that might cause networking to be turned off, but so far nothing. Seems like there has got to be something outside of these two files that is causing the issue since the same thing works on one and not on the other.
I can't just copy the SD and use it in both because I have speciialized software on each. I do not think it is the software because this WAS working but somehow I've changed something to break it.

[SurferTim]

Did you set the wifi country in both?

[davidcoton]

What is in /etc/wpa_supplicant/wpa_supplicant.conf?
Have you changed the hostname of one of them?