6. COMMAND PROTOCOL

The device can be configured in three ways:

1. Via a terminal program, for example, Hercules https://www.hw-group.com/software/hercules-setup-utility via the RS-485 interface.

2. Remotely — by commands sent from the server through an established TCP connection (GPRS/LTE/Wi-Fi).

3. Remotely — by sending an SMS with the command text to the phone number of the SIM card used in DVC POINT 2G/2G-GPS/LTE/LTE ISO

6.1. Command Format

When sending via RS-485 (CRC field is MANDATORY):

:CMD{ … ;}CRC:XXXX

The CRC field is not checked and may contain arbitrary data (for example, 1234).

When sending via GPRS/LTE/Wi-Fi (from the server):

:CMD{ … ;}

The CRC field is absent in this case.

6.2. FULL LIST OF COMMANDS

PERIOD
Period for sending the standard information message to the server.
Value: integer (seconds).
Default: 60. /this command is currently not used/
In the latest firmware versions, the information message is sent on request
:CMD{INFO:?;}\r\n

DATETIME
Setting the device date and time.
Format: “DD.MM.YY HH:MM:SS”
It is recommended to send the command each time a session is opened.

ALARM
Daily hardware reboot time.
Format: HH:MM.
Default: 14:00.
If the time is not set by the DATETIME command, reboot occurs every 24 hours from the moment of power-on.

IPADDRPORT
Server IP address and port for connection.
Format: “IP”,”PORT”.
Default: “203.161.41.45”,”6050″. / for DVC CLOUD /

SSID_PASSWORD
Wi-Fi network name and password (Wi-Fi ISO model only).
Format: “SSID”,”PASSWORD”.
Default: not set.

BAUDRATE
RS-485 interface communication speed.
Allowed values: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200.
Default: 9600.

DATAWIDTH
Number of data bits.
Allowed values: 7, 8.
Default: 8.

STOPBITS
Number of stop bits.
Allowed values: 1, 2.
Default: 1.

PARITY

Parity control.
Allowed values: NONE (none), EVEN (even), ODD (odd).
Default: NONE.

DOUT
Command to close the digital output OC to zero (common) for 2 seconds.
Format: :CMD{DOUT:1;}
Command to close the digital output to zero (common) permanently.
Format: :CMD{DOUT:2;}
Command to open (return) the digital output to 1.
Format: :CMD{DOUT:0;}
Write only. When executed, an unscheduled information message is also sent to the server.

• For DVC POINT LTE ISO and DVC POINT Wi-Fi ISO modems, upon receiving these commands, the NO and COM contacts of the optorelay are closed.

? (Parameter request)
Request current values of one or more settings.
Format: :CMD{COMMAND:?;}
or as a group:
:CMD{COMMAND1:?;COMMAND2:?;}

6.3. COMMAND EXAMPLES

6.3.1. Request current parameters
:CMD{BAUDRATE:?;DATAWIDTH:?;STOPBITS:?;PARITY:?;}CRC:1234

6.3.2. RS-485 configuration
:CMD{BAUDRATE:9600;DATAWIDTH:8;STOPBITS:1;PARITY:NONE;}CRC:1234
Set: 9600 baud, 8 bits, 1 stop bit, no parity.

:CMD{BAUDRATE:19200;DATAWIDTH:8;STOPBITS:2;PARITY:EVEN;}CRC:1234
Set: 19200 baud, 8 bits, 2 stop bits, EVEN parity.

6.3.3. Server connection configuration
Standard cloud portal DVC CLOUD:
:CMD{IPADDRPORT:”203.161.41.45″,”6050″;}CRC:1234

Custom server:
:CMD{IPADDRPORT:”192.168.1.100″,”12345″;}CRC:1234

6.3.4. Wi-Fi configuration (Wi-Fi ISO only)
:CMD{SSID_PASSWORD:”nameWi-Fi”,”Wi-FiPassword”;}CRC:1234

6.3.5. Output control

Command from server (without CRC):
:CMD{DOUT:1;}

Command via RS-485:
:CMD{DOUT:1;}CRC:1234

Result: The digital output closes for 2 seconds. At the same time, the device sends an unscheduled information message to the server.

:CMD{DOUT:2;}CRC:1234

Result: The digital output closes permanently. At the same time, the device sends

an unscheduled information message to the server.

:CMD{DOUT:0;}CRC:1234

Result: The digital output opens. At the same time, the device sends an unscheduled information message to the server.

• For DVC POINT LTE ISO and DVC POINT Wi-Fi ISO modems, upon receiving these commands, the NO and COM contacts of the optorelay are closed.

6.3.6. Setting time and reboot

:CMD{DATETIME:”01.01.26 15:30:00″;}CRC:1234

:CMD{ALARM:”03:00″;}CRC:1234

6.4. COMMAND EXECUTION FEATURES

6.4.1. Operating mode:
For GSM modems, it is better to send configuration commands via RS485 with the SIM card removed, so as not to wait for their execution while the modem attempts to connect to the provider.

6.4.2. IPADDRPORT and SSID_PASSWORD commands:
Are accepted by the device at any time (including during initialization or when there is no connection). After receiving a new command, the modem initializes the network module and attempts to connect to the new address / new network.

6.4.3. Execution confirmation:

Via RS-485: The response is returned to the RS-485 channel.
From the server: Confirmation is received through the communication channel (Wi-Fi/GPRS/LTE).

6.5. TRANSPARENT CHANNEL (DATA TRANSFER)

Any messages that do not match the format :CMD{…;}, do not start with :CMD and do not contain a semicolon before the closing curly brace are treated by the device as user data and are transmitted to the “transparent channel”:

RS-485 → Server: Data received via RS-485 is immediately sent to the open socket.
Server → RS-485: Data received from the socket is immediately transmitted to the RS-485 line.

Important: The device does not analyze or modify packet contents in transparent channel mode.