Command Introduction; Introduction To At Commands; Command Instruction Set; Query Instruction Set - Ebyte E52-400/900NW22S User Manual

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VI. Command Introduction

6.1 Introduction to AT commands

AT instructions are divided into three categories: command instructions, setting instructions and query instructions;

AT command uses 115200 bps baud rate by default, without sending new lines;

Different AT commands require different numbers of input parameters. Different parameters need to be separated by

",". The input parameters are uniformly decimal values. You need to read the instruction set carefully for details. If
the number of input parameters of the AT command is wrong, the serial port will Returns data similar to
"AT+DST_ADDR=CMD_ERR".
Some AT command parameters will be restricted. If the AT command input value is wrong, the serial port will return

data similar to "AT+DST_ADDR=CMD_VALUE_ERR";
If the parameter setting is successful, the serial port will return data similar to "AT+DST_ADDR=OK";

Data in non-AT command sets will be considered transparent data, and the module will initiate a data request, so

you should try to avoid sending data starting with "AT+";
After using the saved instructions, all parameters inside the current module will be saved. Most of the setting

instructions will be saved directly to Flash. Only some common setting instructions can be saved to Flash according
to the parameters.

6.2 Command instruction set

The command instruction has no suffix, and only requires "AT+RESET" to restart the module.

Command
Instruction
AT+IAP
AT+RESET
AT+DEFAULT

6.3 Query instruction set

The suffix of the query command is "=?". For example, the query module related information command

"AT+INFO=?", the module will return the main parameters of the module.
Function
Enter IAP upgrade mode
Module restart
Restore module to factory
settings
After returning AT+IAP=OK, the module immediately restarts
and enters the IAP upgrade mode. It remains powered on for
about 30 seconds and automatically exits the IAP upgrade mode.
After returning AT+RESET=OK, the module will restart
After returning AT+DAFAULT=OK, the parameters will be
restored to factory values, and then restart immediately.
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E52-400/900NW22S User Manual
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