Hi-Link HLK-SW04 User Manual - Page 7
Browse online or download pdf User Manual for Wireless modules Hi-Link HLK-SW04. Hi-Link HLK-SW04 12 pages.
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2 、 Schematic diagram of connection between controller and electromagnetic
lock：
4. APP using instructions
Download and install the cloud smart app and login in(Download the QR code as
follows)：