L86 EVB User Guide
GNSS Module Series
Rev. L86_EVB_User_Guide_V1.0
Date: 2014-08-18
www.quectel.com
GNSS Module Series
L86 EVB User Guide
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Quectel Wireless Solutions Co., Ltd.
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Copyright © Quectel Wireless Solutions Co., Ltd. 2014. All rights reserved.
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About the Document
History
Revision
Date
Author
Description
1.0
2014-08-18
Bond SUN
Initial
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Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 3
Table Index ................................................................................................................................................... 4
Figure Index ................................................................................................................................................. 5
1 Introduction .......................................................................................................................................... 6
2 Introduction to EVB Kit ....................................................................................................................... 7
2.1. EVB Top and Bottom View .......................................................................................................... 7
2.2. EVB Accessories ......................................................................................................................... 9
3 Interface Application ......................................................................................................................... 10
3.1. USB Interface ............................................................................................................................ 10
3.2. UART Interface.......................................................................................................................... 11
3.3. Antenna Interface ...................................................................................................................... 12
3.4. Switches and Buttons ............................................................................................................... 13
3.5. Test Point................................................................................................................................... 14
4 EVB and Accessories ........................................................................................................................ 15
5 Install Device Driver ........................................................................................................................... 16
6 Start PowerGPS.................................................................................................................................. 17
7 Appendix A Reference ....................................................................................................................... 20
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Table Index
TABLE 1: EVB BOTTOM VIEW ........................................................................................................................... 8
TABLE 2: EVB ACCESSORIES .......................................................................................................................... 9
TABLE 3: PINS OF UART PORT ....................................................................................................................... 11
TABLE 4: SWITCHES AND BUTTONS ............................................................................................................. 13
TABLE 5: THE DESCRIPTION OF TEST POINTS ........................................................................................... 14
TABLE 6: DESCRIPTION OF POWERGPS WINDOW ..................................................................................... 18
TABLE 7: REFERENCE .................................................................................................................................... 20
TABLE 8: ABBREVIATIONS .............................................................................................................................. 20
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Figure Index
FIGURE 1: EVB TOP VIEW ................................................................................................................................ 7
FIGURE 2: EVB BOTTOM VIEW ........................................................................................................................ 8
FIGURE 3: EVB ACCESSORIES ........................................................................................................................ 9
FIGURE 4: MICRO-USB INTERFACE .............................................................................................................. 10
FIGURE 5: UART INTERFACE .......................................................................................................................... 11
FIGURE 6: ANTENNA INTERFACE .................................................................................................................. 12
FIGURE 7: SWITCHES AND BUTTONS .......................................................................................................... 13
FIGURE 8: TEST POINTS ................................................................................................................................. 14
FIGURE 9: EVB AND ACCESSORY EQUIPMENT ........................................................................................... 15
FIGURE 10: POWERGPS TOOL ...................................................................................................................... 17
FIGURE 11: COM PORT AND BAUD ................................................................................................................ 17
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1 Introduction
This document defines and specifies the usage of L86 EVB (Evaluation Board). You can get useful
information about L86 EVB and GPS demo tool from this document.
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2 Introduction to EVB Kit
2.1. EVB Top and Bottom View
Figure 1: EVB Top View
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Figure 2: EVB Bottom View
Table 1: EVB Bottom View
Index
Description
A
UART port
B
Serial port alternation switch
C
RESET button
D
FORCE_ON
E
Micro-USB port
F
POWER switch
G
PATCH antenna
H
L86 module
I
Active antenna interface
J
Test points
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3 Interface Application
3.1. USB Interface
Figure 4: Micro-USB Interface
The main power is supplied via Micro-USB interface. Quectel provides two ways for data communication:
Micro-USB and UART interface which are controlled by serial port alternation switch (S401). If you want to
use UART in order to output NEMA, both RS232 and Micro-USB cable are necessary. So the easier way
is to use Micro-USB cable which provides both the power and output NEMA. You can make alternation
between UART port and Micro-USB interface via switch (S401).
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3.2. UART Interface
Figure 5: UART Interface
Table 3: Pins of UART Port
Pin
Signal
I/O
Description
2
RXD
I
Receive data
3
TXD
O
Transmit data
5
GND
GND
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3.3. Antenna Interface
Figure 6: Antenna Interface
Antenna
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3.4. Switches and Buttons
Figure 7: Switches and Buttons
Table 4: Switches and Buttons
Part
Name
I/O
Description
S1
Serial port alternation
switch
I
Quectel EVB supplies two communicative ways:
Micro-USB and UART which are controlled by
switch.
S2
POWER
I
Control power supply via Micro-USB.
K1
FORCE_ON
I
Logic high will force module to wake up from
backup mode.
K2
RESET
I
Press and release this button, then the module
will reset.
S2
S1
K2
K1
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3.5. Test Point
Figure 8: Test Points
Table 5: The Description of Test Points
Pin
Signal
I/O
Description
1
TXD1
O
Transmit data
2
RXD1
I
Receive data
3
RESET
I
System reset
4/6
GND
Ground
5
1PPS
O
1 pulse per second
7
TIMER
O
Logic high will force module to wake up
from backup mode. Keep this pin open or
pulled low before entering into backup
mode. If unused, keep this pin open.
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4 EVB and Accessories
The EVB and its accessories are equipped as shown in Figure 9.
Figure 9: EVB and Accessory Equipment
The GNSS active antenna is not included in L86EVB-KIT. If you need it for your application, you can
purchase separately from Quectel Sales Support.
NOTE
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5 Install Device Driver
Please note that you need to install the driver of Micro-USB when using Micro-USB for data
communication. The driver has been stored in our FTP server. The driver of CP210x can also be
downloaded from internet. The download path of our FTP server is shown as below:
Overseas customer: /d:/FTP/OC/Overseas_Technical/Overseas_Module Official Documents/GNSS
Module/Common/04 Tool Kit/ GNSS_EVB_Micro-USB_Driver_CP210x.
Domestic customer: /d:/FTP/CC/Domestic_Technical/Domestic_Module Official Documents/GNSS
Module/Common/04 Tool Kit/ GNSS_EVB_Micro-USB_Driver_CP210x.
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6 Start PowerGPS
The PowerGPS version is V2.2.0. The PowerGPS tool can help user to view the status of GPS receiver
conveniently. When the tool is opened, the following window will be displayed:
Figure 10: PowerGPS Tool
After EVB accessories are assembled, turn on the module and start up the PowerGPS. Select a correct
COM port and baud rate (L86 module supports 9600bps by default), then click the button “Create
Connection”.
Figure 11: COM Port and Baud
From the PowerGPS window, user can view CNR message, time, position, speed, precision and so on.
Descriptions are listed in Table 6.
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Table 6: Description of PowerGPS Window
Icon
Description
SV with PRN 20. If the position of SV is near to the centre of the
Sky View, the elevation angle of SV is close to 90°. Dark blue
means this satellite is in tracking.
Light blue means this satellite is not in tracking.
The CNR of PRN 27 is 48dB/Hz. Light blue column means the
navigation data of this satellite is in use.
The CNR of PRN 50 is 40dB/Hz. White column means the
navigation data of this satellite is not in use.
UTC time
Latitude degree
longitude degree
Positing fix
The number of used satellites
Horizontal Dilution of Precision
Altitude based on WGS84 Datum
UTC date
Fix type: No-Fix, 3D or 2D SPS
Used satellite
Position Dilution of Precision
Vertical Dilution of Precision
Speed of receiver
You can send PMTK command by PowerGPS. The format of PMTK command only includes characters
between ‘$’ and ‘*’, for example: PMTK869,0.
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Figure 12: MTK Command
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7 Appendix A Reference
Table 7: Reference
SN
Document Name
Remark
[1]
Quectel_L86_Hardware_Design
L86 Hardware Design
[2]
Quectel_L86_Protocol_Specification
L86 Protocol Specification
[3]
Quectel_L86_Reference Design
L86 Reference Design
Table 8: Abbreviations
Abbreviation
Description
CNR
Carrier-to-Noise Ratio
GPS
Global Positioning System
GNSS
Global Navigation Satellite System
GLONASS
Global Navigation Satellite System (The Russian GNSS)
PPS
Pulse Per Second
PRN
Pseudorandom Noise
SPS
Standard Positioning Service
SV
Satellite Vehicle
UART
Universal Asynchronous Receiver & Transmitter
UTC
Universal Time Coordinated
WGS84
World Geodetic System 1984
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