RN131 datasheet(27/40 Pages) MICROCHIP

27 / 40 page

RN131/RN171/RN1723

EVALUATION KITS

USER’S GUIDE

 2013-2015 Microchip Technology Inc.

DS50002183B-page 27

Chapter 3. Application Design Concerns

This section provides the design concerns related to powering an evaluation board,

sensor interface settings, AP mode, and restoring factory settings.

The following topics are discussed:

• Sensor Interfaces

• Push Button Functions

3.1

SENSOR INTERFACES

The input voltage on the sensor inputs must not exceed 1.2V; otherwise, hardware

damage could occur. The Analog-to-Digital Converter (ADC) saturates at 400 mV. It is

recommended to use the sensor power output to drive any analog devices that are

attached to the sensor pins.

3.2

PUSH BUTTON FUNCTIONS

3.2.1

FN Push Button

The FN push button can be used to place the RN module into one of three modes: AP,

Factory reset, and WPS.

3.2.1.1

AP MODE

AP mode allows all Wi-Fi-enabled devices to be associated with the RN module.

To put the RN module into AP mode, FN must be high when the RN module powers up

or wakes from a sleep state. This is done by pressing the FN push button, and then

pressing and releasing the RESET/RST push button, which resets the RN module and

places it into AP mode. Now that the RN module is in AP mode, a default Wi-Fi network

is created with the parameters listed in Table 3-1.

TABLE 3-1:

AP MODE DEFAULT SETTINGS

Once the RN module boots, other Wi-Fi-enabled devices will be able to locate the RN

module whenever scanning for access points.

Note:

Sensor pins 2 and 3 have a resistor network in front of sensors 4 and 5,

respectively. Therefore, these pins can be driven with up to 3.3V DC.

Note:

Using this method to place the RN module into AP mode will override any

previous AP mode software settings.

Setting

AP Mode Default

SSID

WiFly-xxx-yy

Where ‘xxx’ is GSX for RN131, EZX for RN171, and FZX for RN1723 and

‘yy’ is the LSB of the module’s MAC address.

Channel

DHCP Server Enabled

IP Address

192.168.1.1

Netmask

255.255.255.0

Gateway

192.168.1.1

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