FRIENDCOM WSN27-915R Podręcznik użytkownika - Strona 6

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5 SCHEMATIC DESIGN

At the periphery of RF module, a 1206 packaged magnetic bead M1 and filter capacitor shall be

connected in series to the 5 V power supply interface, and L2, C18 and C19 constitute the antenna

port matching circuit.

5.1 Debug Interface as follows.

5.2 LED indication, plus PSRAM (increase node capacity) schematic diagram is as follows.

5.3 Antenna port

The WSN27-915(B)R communication module is encapsulated by the patch. The user PCB board

should leave an antenna port. The user configures the appropriate antenna according to the actual

application. The antenna port is impedance of 50Ohm and connected to the external antenna of 50

Ohm.