Tag Archives: wifi module

Seg 2: wifi module

  1. Wifi module

    From Figure 2-1, wifi module has two rows of pins. If seen it in detail, there are labels for the two rows pins in wifi module, i.e., p1 and p2, which is denoted by the first row pins and the second ones. Each row of pins has 14 pins. Certainly, different type of wifi module is corresponding to the different labels. For example, wifi module is shown in Figure 2-2 has a mental shell, which facilitates heat dissipation, and its pins are labeled from 1 to 28. Similarly, all of the pins are arranged into two rows, each of which has 14 pins. Its schematic diagram could be seen in Figrue 2-3. When the 28 pins are inserted into the Arduino shield board, wifi signal is changed into serial signal, and/or vice versa. In general, there are two MAC addresses in the wifi module, which are used to look for the Application Point (Ap). The relevant context can be referred to the association in the first lesson part.


    Figure 2-2 wifi module with mental shell


    Figure 2-3 Schematic diagram of wifi module (unite: mm)

    Table 2-1 Definitions of pins in the wifi module

number

function

direction

description

1

VCC

Power In

5V power input

2

GND

GND

Power grand

3

WLAN_LED

O

WIFI start instruction

4

VDD

Power Out

3.3V power output

5

LINK2

O

Net gape 2 connection instruction

6

USB_P

I/O

USB signal +

7

USB_M

I/O

USB signal -

8

STA/GPIO_0

I/O

Status instruction/GPIO_0

9

GPIO_1

I/O

GPIO_1

10

ES/RST

I

Exit the passthrough/recovery factory value

11

TX0P2

A

Net gape 2 TX-P

12

TXON2

A

Net gape 2 TX-N

13

RXIP1

A

Net gape 1 RX-P

14

RXIN1

A

Net gape 1 RX-N

15

RXIN2

A

Net gape 2 RX-P

16

RXIP2

A

Net gape 2 RX-P

17

TXON1

A

Net gape 1 TX-N

18

TXOP1

A

Net gape 1 TX-P

19

RTS_N/GPIO_2

I/O

Net gape 2 RTS

20

UART_RX

I

Serial 1 RX

21

UART_TX

O

Serial 1 TX

22

RXD/GPIO_3

I/O

Serial 2 RX

23

LINK1

I/O

Net gape 1 connection instruction

24

CTS_N/GPIO_4

O

Serial 1 CTS

25

WPS/RST

I

WPS button/recovery factory value

26

TXD/GPIO_5

O

Serial 2 TX

27

VDD_1_8

Power Out

Net gape 1.8V output

28

VCC

Power In

5V input