NTRIP configuration using ABh commands

Trimble binary command prerequisites to use the ABh command:

ABh Command Structure

The NTRIP Configuration message has multiple subcommands, but the message ID remains the same for all as shown.

INS configuration generic format
Byte #	Item	Type	Value	Description
0	STX	Char	02h	Start transmission
1	STATUS	Char	00h	See Receiver status byte
2	Message ID	Char	ABh
3	LENGTH	1 (Char)	??h
Data Byte Start
4	RESET FLAG1	1 (Byte)	??h
Data Byte End
Length+4	Checksum	Char	??h	(status + ID + length + data bytes) modulo 256
Length+5	ETX	Char	03h	End transmission

The following commands describe only the specific data portion block of the generic message format.

1. Get NTRIP client parameters

Subcommand 21h requests the current NTRIP client parameters:

Byte #	Item	Type	Value	Description
Data byte start
4	Subcommand	Char	21h
5	NTRIP client ID	Char	01 – 03	Request NTRIP client parameters for this specified client
Data byte end

Subcommand 21h returns the current NTRIP client parameters:

Byte #	Item	Type	Value	Description
Data byte start
4	Subcommand	Char	21h
5	NTRIP client ID	Char	01 – 03	Request NTRIP client parameters for this specified client
6	Enabled	Char	00 or 01	NTRIP client is: 0: Disabled 1: Enabled
7	CASTER ADDRESS LENGTH	Char	n	The number of characters to follow in the CASTER ADDRESS
	CASTER ADDRESS	n Char		ASCII IP address or server DNS name
	CASTER PORT	SHORT	0 – 65535	IP port that the NTRIP caster is connected to
	MOUNTPOINT LENGTH	Char	n	The number of characters to follow in the MOUNTPOINT
	MOUNTPOINT	n Char		ASCII mountpoint name
	USERNAME LENGTH	Char	n	The number of characters to follow in the USERNAME
	USERNAME	n Char		ASCII username
	PASSWORD LENGTH	Char	n	The number of characters to follow in the PASSWORD
	PASSWORD	n Char		ASCII password
	IBSS Mode	Char		0: Disabled 1: Enabled
	TGIP Mode	Char		0: Disabled 1: Enabled
Data byte end

2. Set NTRIP client parameters

Subcommand 20h sets the current NTRIP client parameters:

Byte #	Item	Type	Value	Description
Data byte start
4	Subcommand	Char	20h
5	NTRIP client ID	Char	01 – 03	Request NTRIP client parameters for this specified client
6	CASTER ADDRESS LENGTH	Char	n	The number of characters to follow in the CASTER ADDRESS
	CASTER ADDRESS	n Char		ASCII IP address or server DNS name
	CASTER PORT	SHORT	0 – 65535	IP port that NTRIP caster is connected to
	MOUNTPOINT LENGTH	Char	n	The number of characters to follow in the MOUNTPOINT
	MOUNTPOINT	n Char		ASCII mountpoint name
	USERNAME LENGTH	Char	n	The number of characters to follow in the USERNAME
	USERNAME	n Char		ASCII username
	PASSWORD LENGTH	Char	n	The number of characters to follow in the PASSWORD
	PASSWORD	n Char		ASCII password
	IBSS Mode	Char		0: Disabled 1: Enabled
	TGIP Mode	Char		0: Disabled 1: Enabled
Data byte end

3. Enable/Disable NTRIP Client

Subcommand 22h enables or disables the NTRIP Client specified. The receiver responds with an ACK message if successful or a NACK message if the operation failed:

Byte #	Item	Type	Value	Description
Data byte start
4	Subcommand	Char	22h
5	NTRIP client ID	Char	01 – 03	NTRIP client to be enabled/disabled
6	Enabled	Char	00 or 01	NTRIP client is: 0: Disabled 1: Enabled
Data byte end

4. Get NTRIP caster parameters

Subcommand 70h requests the current NTRIP caster parameters:

Byte #	Item	Type	Value	Description
Data byte start
4	Subcommand	Char	70h
5	NTRIP caster ID	Char	01 – 03	Request NTRIP caster parameters for this specified caster
Data byte end

Subcommand 70h returns the current NTRIP caster parameters. Note that the APPFILE Output message record is used to configure output streams.

Byte #	Item	Type	Value	Description
Data byte start
4	Subcommand	Char	70h
5	NTRIP caster ID	Char	01 – 03	Request NTRIP caster parameters for this specified caster
6	Enabled	Char	00 or 01	NTRIP caster is: 0: Disabled 1: Enabled
7–8	TCP/IP port	SHORT	0 – 65535	IP port for the NTRIP caster
9	Authentication Type	Char	N	Shall be ‘N’
10	Fee	Char	N	Shall be ‘N’
11	NMEA Required	Char	0	Shall be ‘0’ (zero)
12	MOUNTPOINT LENGTH	Char	n	The number of characters to follow in the MOUNTPOINT
	MOUNTPOINT	n Char		ASCII mountpoint name
Data byte end

5. Enable/Disable NTRIP caster

Subcommand 72h enables or disables the NTRIP Client specified. The receiver responds with an ACK message if successful or a NACK message if the operation failed:

Byte #	Item	Type	Value	Description
Data byte start
4	Subcommand	Char	72h
5	NTRIP caster ID	Char	01 – 03	NTRIP caster to be enabled/disabled
6	Enabled	Char	00 or 01	NTRIP caster is: 0: Disabled 1: Enabled
Data byte end

6. Change NTRIP caster TCP/IP port

Subcommand 73h changes the NTRIP caster TCP/IP port. The receiver responds with an ACK message if successful or a NACK message if the operation failed:

Byte #	Item	Type	Value	Description
Data byte start
4	Subcommand	Char	73h
5	NTRIP caster ID	Char	01 – 03	Request NTRIP caster parameters for this specified caster
6–7	TCP/IP port	SHORT	0 – 65535	IP port for the NTRIP caster
Data byte end

7. Change NTRIP caster mountpoint

Subcommand 74h changes the NTRIP caster mountpoint name. The receiver responds with an ACK message if successful or a NACK message if the operation failed:

Byte #	Item	Type	Value	Description
Data byte start
4	Subcommand	Char	74h
5	NTRIP caster ID	Char	01 – 03	Request NTRIP caster parameters for this specified caster
6	TCP/IP port	SHORT	n	The number of characters to follow in the MOUNTPOINT
	MOUNTPOINT	n Char		ASCII MOUNTPOINT name
Data byte end