User's Manual

Fig

2-2 HLK-WR02Interface

2.3.1 RS232

The following figure shows a schematic diagram of the external interface of RS232.

Interface,the definition is as follows:

Fig 2-3 RS232 PIN

No Function Direction Explaination

1 N/C N/C None

2 RXD Input Data reciving input

3 TXD Output Data sending output

4 N/C N/C None

5 GND Input Ground

6 N/C N/C None

7 N/C N/C None

8 N/C N/C None

2.3.2 LAN Interface and WAN interface

HLK-WR02

serial wifi server

provides two network interface, WAN port and LAN port, the

interface is a standard form of RJ-45 interface. RJ-45 interface definition is shown as

below

：