TERSUS Oscar Quick start guide

User
Manual
Guide
Version V1.3-20210224
Oscar GNSS Receiver
Firmware Upgrade Guide
©2021 Tersus GNSS Inc. All rights reserved.
Sales Enquiry: [email protected]
Technical Support: su[email protected]
More details, please visit www.tersus-gnss.com

Oscar Firmware Upgrade Guide v1.3
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Table of Content
Table of Content..............................................................................................- 1 -
List of Figures..................................................................................................- 1 -
1. Interfaces of Oscar...................................................................................- 2 -
2. Firmware Upgrade....................................................................................- 3 -
2.1 Wired Upgrade............................................................................... - 3 -
2.2 Wireless Upgrade.......................................................................... - 5 -
List of Tables
Table 1 Interfaces on the bottom side......................................................... - 2 -
List of Figures
Figure 1 Bottom of Oscar.............................................................................. - 2 -
Figure 2 Copy the .GZ firmware file to a USB flash drive........................ - 3 -
Figure 3 Copy the .BIN firmware file to a USB flash drive.......................- 4 -
Figure 4 Connect Oscar to a USB flash drive............................................- 4 -

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1. Interfaces of Oscar
The bottom of Oscar receiver is shown as below.
Figure 1 Bottom of Oscar
Table 1 Interfaces on the bottom side
Icon
Connector
Name
Connections
Serial port &
External power
External power, RS-232 communication,
external radio
Mini USB port
Device, computer, USB drive
SIM
SIM slot
Nano SIM card
-
TNC port
410-470MHz Radio Antenna
Screw hole
It is a 5/8’’ x 11 UNC-2B connector for
corresponding connector and pole.
Serial port & External power
TNC port
Mini USB port
SIM slot
Speaker
Screw hole
Battery compartment

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2. Firmware Upgrade
There are two methods to upgrade firmware for Oscar GNSS Receiver: wired
upgrade and wireless upgrade.
2.1 Wired Upgrade
The detailed steps of Oscar upgrade are as follows.
1) Download the latest firmware file from Tersus website
https://www.tersus-gnss.com/software/oscar-gnss-receiver for different
versions. If your Oscar firmware version is V1.2.x or previous versions, it is
needed to download the specific upgrade package that is designated for
your Oscar version (Ultimate/Advanced/Basic). If your Oscar firmware
version is V1.3.0 or later, download the unified upgrade package only.
Please be noted that the downloaded file is a .zip file, unzip this file to find a
pdf document and the firmware file of .GZ format or .BIN format (for V1.3.0
or later firmware upgrade).
2) Prepare a USB flash drive, ensure the file system of this drive is FAT32.
Create a folder named "OscarUpdate" under the root directory of the USB
flash drive, then put the latest firmware file in it (DO NOT unzip the firmware
file further). Make sure there is only one firmware file in this folder.
Figure 2 Copy the .GZ firmware file to a USB flash drive

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Figure 3 Copy the .BIN firmware file to a USB flash drive
3) Ensure Oscar is powered off, and use the Mini-USB OTG cable to connect
Oscar to the USB flash drive.
Figure 4 Connect Oscar to a USB flash drive
4) Long press the power button to power on Oscar. If your Oscar firmware
version is earlier than V1.4.0RC1 (not included), the firmware upgrade
program will automatically start after boot up; if your Oscar firmware
version is V1.4.0RC1 or later, it is needed to long press the FN button to
start firmware upgrade program, until the OLED displays "SYSTEM
UPGRADE" or the six LEDs of the basic version are all on, release the FN
button and wait for the upgrade.
For Ultimate and Advanced versions, the firmware upgrade starts when the
OLED displays ‘SYSTEM UPGRADE’, after finishing the upgrade it
displays ‘SYSTEM REBOOT’ and it reboots automatically to present the

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upgraded firmware. For Basic version, all its six LEDs light up when it starts
firmware upgrade, after finishing the firmware upgrade the power LED
lights up and the satellite LED flashes, which means it restarts successfully
with updated firmware.
Note: Please make sure the battery has enough power for the firmware
upgrade. The GNSS board inside Oscar will upgrade when the firmware is
upgrading, any forced power failure will cause the system crash.
2.2 Wireless Upgrade
There are two methods for wireless upgrade: one is using web upgrade via
WiFi, the other is using Nuwa app via PDA network.
The details are to be updated. Stay tuned for the new version of this guide.

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Proprietary Notice
All Information in this document is subject to change without notice and does
not reflect the commitment on Tersus GNSS Inc. No part of this manual may be
reproduced or transmitted by all means without authorization of Tersus GNSS
Inc. The software described in this document must be used in terms of the
agreement. Any modification without permission from Tersus GNSS Inc. is not
allowed.