C94-M8P Application Brd Setup Guide Datasheet by U-Blox

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C94-M8P Application Board
Setup Guide
UBX-16009722 R02
C94-M8P Board Connections and Interfaces
J1: RS232 UART M8P/Radio
J3: External battery / DC
J6: Debugger interface for radio
J8: UART & GNSS features
Geofence and RTK status
Interface to e.g. u-blox C027
J9: Indicator LEDs
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Slide 2
Setting up the C94-M8P
Two C94-M8P boards the “Base” and the “Rover” – need to be set up:
1. Connect the UHF whip antenna to the SMA connector “UHF”
2. Connect the GNSS patch antenna to the SMA connector ”GNSS”
3. Connect the USB port on the board to a PC (for power and configuration)
© u-blox AG
Slide 3
https://www.u-blox.com/en/product/u-center—windows fl
Preparing to Configure the C94-M8P
To configure your C94-M8P kit you need to first:
Download the latest u-center from
© u-blox AG
Slide 4
https://www.u-blox.com/en/product/u-center-windows fl
Updating firmware on C94-M8P
All the changes in configuration are lost when application boards are
updated. The Base and Rover must be re-configured after updating.
Do not have more than one application board connected to your computer
while updating.
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Slide 5
Before starting the evaluation, check that the application boards are using the latest
firmware (currently HPG 1.40). Information on the latest firmware is published on the
u-blox web site. To update the firmware, follow the steps described in the u-center
User Guide, chapter 8.1, Firmware update.
See https://www.u-blox.com/en/product/u-center-windows.
Configuring the Base Station
There are three steps to configure the Base Station:
1. Set the position, by having the Base Station do one of the following:
a) survey-in its coordinates
b) be configured with pre-surveyed coordinates
2. Set-up the port for the Radio Link for Port configuration
3. Select RTCM messages for transmission
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Slide 6
The two boards are identical. Select one board to act as a “Base Station”.
The next slides will guide you through the steps needed to configure the Base Station
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Step 1 The Base Station Coordinates
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Slide 7
Begin a self survey
Use, for example, 5 minutes
and 2 meters as targets.
With a good antenna in a
friendly multipath
environment you can reach
1 meter with a 10-15 min
observation time.
Or, provide a fixed position
ase es its IME". might @Mmgs-wx-mvmwm)-svu(&aww-in) El Time 01 Week. /V Stems Mean PUSIHUH Valid Ubselvanon Tlme POSIHOI’IS Used: Mean ECEF X: Mean ECEFY Mean ECEFZ Mean 30 SldDev UBX - NAV [Navigation] - SVIN [Survey-1n] 305031 DDD S uccessltu finished Yes 300 301 2883274 1 783 1333944. 6038 5512145 7873 1 6338 [3] [:1 [m] [M] {m} [M] 1: 3-? Pull 3‘1 «m
Step 1 The Base Station Coordinates
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Slide 8
The UBX-NAV-SVIN message allows you
to monitor the survey-in process.
Self survey finishes when the accuracy
AND time limit are satisfied.
An operating Base
Station indicates its
Fix Mode as “TIME”.
Note that you might
have to disable NMEA
messages to see this
mode correctly.
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Step 2 Base Station Radio Link
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Slide 9
Use UBX-CFG-PRT to specify that only RTCM3 data is output on UART1.
UBX - CFG [Emig] - MSG [Messages] unx - EFG [Cnnfig] - MSG [Metsaget] UBX - CFG [Carlin] » MSG [Messages] UBX - CFG [Carlin] » MSG [Messages] Message F505FITEM3-21EIUS v Menage |F5-aoHTCM3.z1un _v] Message |F551RTCM321037 ;| Message F5-ESRTCM321230 v IZC l— a" In— Izc I" On In— IZC I— On In— IZC I‘ On In— UART1 I? On [1— UAFm I7 0n [1— UARTI l7 0n [1— UARTI l7 On [10— UAHTZ r [In In— UAHTZ I— On lu— UARTZ I— On ID— UARTZ I— On ID— usa I— On In— USB I— On In— usa I— On In— usa I— On In— SPI Fan IU— sn I_Un ID— SPI I‘Un ID— SPI I‘Un ID— socm l— 0" ln— SDCaId l— 0" lo— SDCad I— On lu— SDEad I— 0n [0— UBX-15031066 @blox
Step 3 Selecting RTCM messages
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Slide 10
For a GPS/BeiDou setup or moving baseline applications, refer to the User Guide (UBX-15031066).
Use UBX-CFG-MSG to specify that these three RTCM3 messages are
output on UART1.
1005 (Station coordinates)
1077 (GPS observations), and
1087 (GLONASS observations)
1230 (GLONASS code-phase biases)
Rover Setup Overview
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Slide 11
Steps needed to set up the Rover
1. Configure radio link
A Rover that receives RTCM messages will automatically go into RTK operational
mode, and no further configurations are needed.
I" NMEA BX ' ACK (Mknawledgg) AID (6P5 Aiding) cm (Config) CFG (Configuration) DAT (Datum) ANT (Antenna Smings) BATCH (Batch made output) DGNSS (Dmeremial GNSS configumic DOSC (Dixiplintd Ostillakol) v Fm "Nils-Mir v ‘ > lil X '1‘3end .3?me ERIEEIEI UBX - EFE [Ccdig] - PHI [Pam] had 1 man , Pruhucd in 5 . HTEMa _ Plutacnl um none ' Baum [H
Step 1 Rover end Radio Link
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Slide 12
Use UBX-CFG-PRT to ensure that UART1 is set up to receive RTCM3
corrections, and that no data is sent out (Protocol out: “none”).
\gw E ire‘hri— gm
Rover Operation
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Slide 13
A Rover that receives RTCM corrections will automatically apply these and will:
1. Immediately go into an RTK FLOAT mode
2. Go into RTK FIXED mode once it has resolved the carrier ambiguities
START 1. 2.
Important Note on Antennas
Rover and Base antennas use ground planes
The roof of a car can serve as an excellent ground
plane when the patch antenna is placed in the middle
of the roof
Base antennas are placed in unobstructed
Also rover antenna placement options should be
carefully examined for each application
Working in difficult environments and/or without
ground planes will make convergence times long
See White Paper “Centimeter Navigation with Low
Cost Antennas” (UBX-16010559) published on the
u-blox website for more information
© u-blox AG
Slide 15
RTK technology depends on continuous carrier phase
tracking, and therefore it is most important that:
Notes on Usage
The C94-M8P kit contains two boards configured to work as a pair
The default radio configuration supports one Base station transmitting to one
Rover, and no other Base stations must be transmitting in the area. For other
setups, please refer to the User Guide.
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Slide 16
Notes on the LEDs
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Slide 17
Blue LED is blinking when there is
a GNSS position fix (TIMEPULSE)
If there is no GNSS fix, the
LED will light up without
Green LED indicates the RTK
LED flashes in float mode and
stays on in fix mode.
The LED is off when there is
no RTK fix.
https://www. u-bon.com/en/product/c94-m8p
More Information
Product website: https://www.u-blox.com/en/product/c94-m8p
C94-M8P User Guide (UBX-15031066)
C94-M8P-1-10/11 for China (433 MHz)
C94-M8P-2-10 /11for USA and Canada (915 MHz)
C94-M8P-3-10/11 for Europe (433 MHz)
C94-M8P-4-10/11 for Japan (920 Mhz)
Note that the connectors differ from the older -00 variants. Please refer to
the last two slides for more connector information.
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Slide 18
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C94-M8P-B Board Connections and Interfaces
J1: RS232 UART M8P/Radio
J3: External battery / DC
J4: UART interface
J6: Debugger interface for radio
J8:Test & Production interface
J9: Geofence and RTK status
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Slide 19
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J3 J1 J2 J8
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C94-M8P-B Notes on the LEDs
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Slide 20
Red LED blinking when the radio
module is transmitting
Green LED blinking when radio
module ready to receive and on
when link established
Blue LED blinking when there is a
GNSS position fix (TIMEPULSE)
Yellow LED indicates RTK status:
blinking indicates Float
on indicates Fixed ambiguity

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