Part 6 – AT Commands for GPS-Enabled Devices

Chapter 16 – AT Commands for GPS-Enabled Devices

RMC – Recommended Minimum Specific GNSS Data

Time, date, position, course and speed data provided by a GNSS navigation receiver.

Structure:

$GPRMC,hhmmss.sss,A,dddmm.mmmm,a,dddmm.mmmm,a,x.x,x.x,ddmmyy,,,a*hh<CR><LF>

Example:

$GPRMC,111636.932,A,2447.0949,N,12100.5223,E,000.0,000.0,030407,,,A*61<CR><LF>

Name

Example

Description

Message ID

$GPRMC

RMC Protocol Header

UTC time

111636.932

UTC of position in hhmmss.sss format (000000.00 ~

 

 

235959.999)

Status

A

Status: 'V’ = Navigation receiver warning; ‘A’ = Data Valid

Latitude

2447.0949

Latitude in dddmm.mmmm format d

N/S indicator

N

Latitude hemisphere indicator: ‘N’ = North, ‘S’ = South

Longitude

12100.5223

Longitude in dddmm.mmmm format

E/W Indicator

E

Longitude hemisphere indicator: 'E' = East, 'W' = West

Speed over ground

000.0

Speed over ground in knots (000.0 ~ 999.9)

Course over ground

000.0

Course over ground in degrees (000.0 ~ 359.9)

UTC Date

030407

UTC date of position fix, ddmmyy format

 

,

Magnetic variation, degrees

 

,

East or West

Mode indicator

A

‘N’ = Data not valid

 

 

‘A’ = Autonomous mode

 

 

‘D’ = Differential mode

 

 

‘E’ = Estimated (dead reckoning) mode

 

 

‘M’ = Manual input mode

 

 

‘S’ = Simulator mode

Checksum

*61

 

<CR><LF>

<CR><LF>

End of message (termination)

VTG – Course Over Ground and Ground Speed

The Actual course and speed relative to the ground.

Structure:

GPVTG,x.x,T,,M,x.x,N,x.x,K,a*hh<CR><LF>

Example:

$GPVTG, 000.0,T,,M,000.0,N,0000.0,K,A*3D<CR><LF>

Name

Example

Description

Message ID

$GPVTG

VTG Protocol Header

Course

000.0

True course over ground in degrees (000.0 ~ 359.9)

Reference

T

True

Course

,

Measured heading (degrees)

Reference

M

Magnetic

Speed

000.0

Speed over ground in knots (000.0 ~ 999.9)

Units

N

Knots

Speed

0000.0

Speed over ground in kilometers per hour (0000.0 ~ 1800.0)

Units

K

Kilometers per hour

Mode

A

‘N’ = not valid

 

 

‘A’ = Autonomous mode

 

 

‘D’ = Differential mode

 

 

‘E’ = Estimated (dead reckoning) mode

 

 

‘M’ = Manual input mode

 

 

‘S’ = Simulator mode

Checksum

*3D

 

<CR><LF>

<CR><LF>

End of message (termination)

Universal IP AT Commands Reference Guide (Document S000457K)

102

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Multi-Tech Systems iCell GPRS (MTSMC-G2-IP manual RMC Recommended Minimum Specific Gnss Data, $Gprmc, $Gpvtg
Page 101 Page 103

iCell GPRS (MTSMC-G2-IP specifications

Multi-Tech Systems iCell GPRS (MTSMC-G2-IP) is a versatile and powerful device designed for seamless connectivity in various applications, particularly in industrial and commercial environments. Known for its robust performance, the iCell GPRS module incorporates advanced technologies that enable effective communication over GPRS networks, making it an ideal solution for IoT applications, remote monitoring, and data collection processes.

One of the main features of the iCell GPRS is its dual SIM capability, which enhances network reliability and ensures continuous connectivity even in the event of network outages. By allowing the use of two SIM cards from different carriers, the device can switch between networks automatically, thereby minimizing downtime and maintaining critical communication channels.

The iCell GPRS supports various protocols including TCP/IP, UDP, and MQTT, which facilitates seamless integration with a range of applications. This flexibility in communication protocols allows developers to create customized solutions tailored to their specific needs, ensuring that the device can fit seamlessly into their existing infrastructure.

Another key characteristic of the MTSMC-G2-IP is its compact design and durability, making it suitable for deployment in a variety of environments. It features a wide operating temperature range that allows it to function efficiently in both extreme heat and cold, thereby catering to diverse applications across different industries. Additionally, the device is designed for easy installation and integration, which helps reduce deployment time and costs.

The iCell GPRS also includes built-in security features such as firewalls and secure data transmission protocols, protecting sensitive information from unauthorized access. This is particularly important for applications in sectors such as healthcare, finance, and transportation, where data integrity and security are paramount.

Furthermore, the device is equipped with various I/O ports that facilitate connectivity with external sensors, actuators, and other hardware. This feature makes it highly adaptable for monitoring and control systems, enabling users to gather real-time data and respond promptly to changing conditions.

In sum, the Multi-Tech Systems iCell GPRS (MTSMC-G2-IP) is a reliable and feature-rich solution designed for modern communication needs. Its dual SIM support, protocol versatility, robust design, and integrated security features make it an ideal choice for IoT and remote monitoring applications across numerous industries. Whether used in industrial automation, environmental monitoring, or smart cities, the iCell GPRS stands out as a dependable device that enhances connectivity and operational efficiency.
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