This firmware operates with UBX-M8030-KT-DR and UBX-M8030-KA-DR chips and NEO-M8L
professional and automotive grade modules.
Scope
This release note covers the changes to the ADR 4.31 firmware compared to the ADR 4.21
firmware version. For a comprehensive list of changes with respect to earlier versions, this
release note should be read in conjunction with the ADR 4.21 release note.
u-blox GNSS Standard Driver for Windows v. 1.2.0.8
u-blox GNSS Sensor Device Driver for Windows v. 2.40 and later
u-blox GNSS VCP Device Driver for Windows v. 3.10
The latest drivers are available in the Product resources section of the u-blox website -
Built-in driver support for directly connected sensors
This release includes built-in support for the following sensors connected via a two-wire
interface (hardware sensor interface). Additional sensors may be supported on request in the
future firmware releases.
2ADR 4.31
Introduction
This chapter describes the new ADR features and improvements in this release compared to
flash firmware ADR 4.21.
UDR fallback
Note that ADR 4.31 firmware supports UDR fallback. In case of missing wheel tick data, the
firmware will automatically switch to UDR mode.
This release has been optimized and tested for light road vehicles including motorbikes.
Performance and behavior has not been characterized for trains, trams or trolleybuses.
4 Improvements
The following improvements in terms of positioning accuracy and reliability have been made in
this firmware release:
1. Handling of vertically mounted modules or IMU sensors (Gimbal Lock) (ID1335)
2. Handling of modules or IMU sensors mounted with certain roll angle while using manual
alignment (ID1336)
3. Positioning performance during vehicle acceleration. (ID1349)
4. Switching between DR and no-fix mode (ID1361)
5. Directional output while reversing (ID1343)
6. Map aiding functionality (ID1362)
7. Data transfer via USB interface (ID1366)
8. RTC reset mechanism (ID1379)
9. Hot start behavior under difficult GNSS conditions (ID1360)
10. 3D position accuracy estimation after power cycle (ID1371)
11. Thresholds for turn table mode to enable faster recovery for heading (§7.2.17)
12. Reduced the effect of vibration on INS offset while the vehicle is stationary (§7.2.18)
13. GNSS: Starting bit detection strictly after bit synchronization (§7.2.19)
14. ADR bike platform: INS reset after power cycle (ID1374)