User's Guide

PLM150 User’s Guide (LoRaWAN) V1.0

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omissions, and mistakes. No part may be reproduced or copied without written permission or contract.

1.4 GPIO Interface

Various functions can be implemented through GPIO interface in PLM150. Currently, serial

enable / disable function is implemented through GPIO 3.

[ Table 2 PIN Description ]

PIN Name

Description

GPIO3

Control UART1 Serial Rx Enable through GPIO 3

(HIGH : Enable, LOW : Disable)

ex) When AT command is used, GPIO 3 pin is set

to HIGH and GPIO3 pin is set to LOW for low

power after AT command use.

2 Command Interface

PLM150 sends/receives Commands and Responses to the host in AT mode through UART. AT

mode is to set the configuration and control the connection by issuing the standard AT

commands via a serial interface. PLM150 operates in AT mode after the initial booting. Users

can issue the AT commands to receive the current setting values and send the values for the

configuration setting. Some of the configuration (value) changes may require to reboot the

system, which can be done by issuing the "AT+RSET" command.

2.1 AT Commands

2.1.1 Commands Type

All of the AT command lines must start with 'AT' prefix and be terminated with <CR>. It supports

the command syntax in Table 2. The default setting for the AT commands supports ECHO, and