在添加无线打印机过程中遇到问题时要检查什么?

确保你的设备在2.4GHz频率下连接,并且不要处于VPN模式。你需要离打印机足够近,以便于Wi-Fi信号接收。

From the official HP Laserjet M109 M112 Printer manual, page 7

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