What Wi-Fi frequency does the HP LaserJet M109/M112 wireless model support?
The HP LaserJet M109/M112 wireless model only supports 2.4 GHz Wi-Fi connections. If your router is set to 5 GHz only, the printer will not be able to connect. Make sure your network is broadcasting on the 2.4 GHz band during setup. (Page 3)
From the official HP Laserjet M109 M112 Printer manual, page 3
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