User's Manual

5
1.7 Mechanical dimensions
Unit: mm (mm)
Figure 3 Module detail dimensions
2. Functional Description
HLK-RM58S supports serial port to WIFI STA, serial to WIFI AP mode.
2.1 WiFi indicator flashing description
The module is flashed by the LED indicator in different modes, so that the module running
status can be quickly and easily known. The WiFi indicator of the module mainly has the following
status:
(1) The wifi indicator flashes twice periodically: indicates that the module is in the one-click
distribution mode.
(2) The wifi indicator flashes thirdly periodically: indicates that the module is in the sta mode
and the target ap hotspot is not connected.
(3) The wifi indicator flashes periodically: indicates that the module is in the 5.8g ap mode, but
it does not indicate whether there is a sta client device connected.
(4) The wifi indicator flashes quickly: indicates that the module is in the sta mode and is
connected to the wifi hotspot. When there is data transmission, the module LED will flash
quickly.