MDEV-GPS-RM datasheet(12/27 Pages) LINX

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ZDA – Universal Time and Date

Figure 17 contains the values for the following example:

$GPZDA,183746.000,22,08,2014,,*56

Start-up Response

The module outputs a message when it starts up to indicate its state. The

normal start-up message is shown below and the message formatting is

shown in Figure 18.

$PMTK010,001*2E<CR><LF>

Start-up Response Example

Name

Example

Description

Message ID

$PMTK010

Message header

Message

MSG

System Message

0 = Unknown

1 = Start-up

2 = Notification for the host supporting EPO

3 = Transition to Normal operation is successful

Checksum

CKSUM

End Sequence <CR> <LF> End of message termination

Universal Time and Date Example

Name

Example

Units

Description

Message ID

$GPZDA

ZDA protocol header

UTC Time

183746.000

hhmmss.sss

Day

01 to 31

Month

01 to 12

Year

2014

1980 to 2079

Local Zone Hour

Offset from UTC; set to null

Local Zone Minutes

Offset from UTC; set to null

Checksum

*56

End of message termination

Figure 17: Universal Time and Date Example

Figure 18: Start-up Response Example

Input Messages

The following outlines the serial commands input into the module for

configuration. There are 3 types of input messages: commands, writes and

reads. The module outputs a response for each input message.

The commands are used to change the operating state of the module.

The writes are used to change the module’s configuration and the reads

are used to read out the current configuration. Messages are formatted as

shown in Figure 19. All fields in each message are separated by a comma.

Figure 20 shows the input commands.

Serial Data Structure

Name

Example

Description

Start Sequence

$PMTK

Message ID

<MID>

Message Identifier consisting of three numeric

characters.

Payload

DATA

Message specific data.

Checksum

CKSUM

CKSUM is a two-hex character checksum as

defined in the NMEA specification, NMEA-0183

Standard for Interfacing Marine Electronic Devices.

Checksums are required on all input messages.

End Sequence

Each message must be terminated using Carriage

Return (CR) Line Feed (LF) (\r\n, 0x0D0A) to cause

the receiver to process the input message. They

are not printable ASCII characters, so are omitted

from the examples.

Figure 19: Serial Data Structure

Input Commands

Name

Description

101

Hot Re-start

102

Warm Re-start

103

Cold Re-start

104

Restore Default Configuration

161

Standby Mode

220

Position Fix Interval

251

Serial Port Baud Rate

255

Sync 1PPS and NMEA Messages

285

1PPS Configuration

286

Enable Active Interference Cancellation

Figure 20: Input Commands

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