RN131 datasheet(23/40 Pages) MICROCHIP

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Getting Started

 2013-2015 Microchip Technology Inc.

DS50002183B-page 23

2.3

MODULE CONFIGURATION

The RN modules of the evaluation boards operate in two modes:

• Data mode (default)

• Command mode

2.3.1

Data Mode

In Data mode, an RN module is essentially a data pipe. When the RN module receives data

over Wi-Fi, it strips the TCP/IP headers and trailers, and passes the user data to the UART.

When data is written to the UART, the RN module constructs the TCP/IP packet and sends

it out over Wi-Fi. Therefore, the entire process of sending/receiving data to the host is

transparent to the microcontroller of the end-application/user.

2.3.2

Command Mode

By default, the RN module is in Data mode. Sending an escape sequence of three

$$$

characters causes the RN module to enter Command mode. Once in Command

mode, the RN module can be configured using simple ASCII commands. To exit

Command mode and return to Data mode, type exit and press <Enter>.

Basic configuration requires the wireless network access point’s name (SSID) and the

authentication password. The RN module can associate with only one network at a

time. It is recommended to begin evaluation by configuring the RN module using an

open access point to simplify the setup.

The following two methods are used to configure the RN module:

• Over the UART connected to a PC/laptop or to a microcontroller

• Through Wi-Fi using Soft AP mode

A terminal emulator is required to enter the commands and to monitor the transactions.

Figure 2-1 shows an application interface for Data and Command modes.

FIGURE 2-1:

APPLICATION INTERFACE FOR DATA AND COMMAND MODES

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