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19 | GPS Sensor
19.1 GPS (Global Positioning System)
19.1.1 Serial interface characterization
19.2 Protocol
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19 GPS Sensor
Space-based global navigation satellite system.
GPS provides positioning, navigation, and timing services to worldwide users.
GPS receiver (sensor) gives digital information about position (longitude, latitude, height),
ground speed, course, and status.
Two types of GPS receivers:
CAN output -> Read in messages via CAN Input of VCU MS 50.4 (not covered here)
Serial output -> Read in messages via RS232 Interface of VCU MS 50.4
Serial Interface is characterized by:
Voltage levels: RS232 is standard (+/-12 V), UART (0 V/ 5 V) needs level shifter
Baud rate: 9,600 is standard for GPS, VCU MS 50.4 supports 1,200 to 115,200 baud. GPS
Rx interface baud rate must match VCU MS 50.4 interface baud rate. VCU MS 50.4 Baud
rate can be set with the 'GPS_BAUDRATE' characteristic Data format: VCU MS 50.4 expects
8 data bits, no parity bit, 1 stop bit (8N1)
Serial Interface is characterized by:
Voltage levels: RS232 is standard (+/-12 V), UART (0 V/ 5 V) needs level shifter
Baud rate: 9,600 is standard for GPS, VCU MS 50.4 supports 1,200 to 115,200 baud. GPS
Rx interface baud rate must match VCU MS 50.4 interface baud rate. VCU MS 50.4 Baud
rate can be set with the 'GPS_BAUDRATE' characteristic Data format: VCU MS 50.4 expects
8 data bits, no parity bit, 1 stop bit (8N1)
VCU MS 50.4 expects NMEA Protocol (ASCII).
The following messages are decoded:
Message
GGA
GSA
GSV
RMC
VTG
On most GPS sensors, these messages are activated in the default configuration.
Vehicle_Control_Unit_VCU_MS_50.4_Manual
Function
GPS fix information
Overall satellite data
Detailed satellite data
Recommended minimum data for GPS
Vector track and speed over the ground
Bosch Motorsport
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