Roving Networks WIFLY GSX Manual do Utilizador descarregar pdf (Página 47)

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RN-WIFLYCR-UM

When the module wakes up from sleep, it takes time (in milliseconds) to initialize the internal hardware. During this time,

any data that is sent to the WiFly module over the UART is not processed. You can monitor signals that indicate the

module is ready to accept data, as described in Table 19.

Table 19. Signals Indicating the Module Can Accept Data

Method

Interface

Description

RTS transition

RTS pin

When the WiFly module wakes up, the RTS pin goes high. Once the module is ready,

the RTS pin is driven low. You can monitor this pin with a microcontroller.

Monitor GPIO4

Alternative

GPIO

functions

Set the alternative functions for GPIO4, GPIO5, and GPIO6 (see “Setting the Alternate

GPIO Functions” on page 53). When the module wakes up and connects to an access

point, GPIO4 goes high, indicating the module is ready to receive data over the UART.

A microcontroller can monitor GPIO4.

Sensor power

You can configure the module to output Vbat, or 3.3 V or 1.2 V on the sensor power pin

when it wakes from sleep, indicating it is ready to accept data.

After the module wakes, you can open a TCP connection to a remote host in a number of ways, as described in Table 20.

You set the remote host using the following commands:

set ip host <address> OR set dns name <string> // Sets the host’s IP address OR URL

set ip remote <value> // Sets the port number on which the host is listening

save // Save the settings in the configuration file

reboot // Reboot the module so that the settings take effect

Table 20. Methods of Connecting to a Remote Host

Method

Type

Description

Auto connect

Internal RTC

timer

Connect to the host at specific time intervals based upon the set sys autoconn <value>

command setting.

Open

UART

In command mode, issue the open command.

Connect on UART

data

UART mode 2

This mode is designed for the HTML client feature. Use the set uart mode 2 command

to connect the to host automatically when UART data is received.

GPIO5

Alternative

GPIO

functions

Set the alternative functions for GPIO4, GPIO5, and GPIO6 (see “Setting the Alternate

GPIO Functions” on page 53). Set GPIO5 high to trigger a TCP connection and low to

disconnect.

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