Supported Character Sets; At Command Interface; Unsolicited Result Code - Quectel EC25 Command Manual

Table 1: Types of AT Commands and Responses
Test Command AT+<x>=?
Read Command AT+<x>?
AT+<x>=<...>
Write Command
Execution
AT+<x>
Command

1.3. Supported Character Sets

EC25 & EC21 AT command interface defaults to the GSM character set. EC25 & EC21 modules support
the following character sets:

GSM format

UCS2

IRA
The character set can be configured and interrogated by using the AT+CSCS command (3GPP TS
27.007) and it is defined in 3GPP TS 27.005. The character set affects transmission and reception of SMS
and SMS Cell Broadcast Messages, as well as the entry and display of phone book entries text field.

1.4. AT Command Interface

EC25 & EC21 AT command interface includes two USB ports (USB MODEM port and USB AT port) and
one main UART port. The main UART port and two USB ports support AT command communication and
data transfer.

1.5. Unsolicited Result Code

As an Unsolicited Result Code and a report message, URC is not issued as part of the response related
to an executed AT command. URC is issued by the EC25 & EC21 without being requested by the TE and
it is issued automatically when a certain event occurs. Typical events leading to URCs are incoming calls
(RING), received short messages, high/low voltage alarm, high/low temperature alarm, etc.
EC25&EC21_AT_Commands_Manual
This command returns the list of parameters and value ranges
set by the corresponding Write Command or internal processes.
This command returns the currently set value of the parameter
or parameters.
This command sets the user-definable parameter values.
This command reads non-variable parameters affected by
internal processes in the UE.
LTE Module Series
EC25&EC21 AT Commands Manual
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