AgriBus-GMiniR User's Manual - Mobile stations Edition (Public Version)
This manual is intended for use when the dual-frequency RTK-GNSS receiver "AgriBus-GMiniR" is installed in a vehicle and used as a mobile station.
---
# What is AgriBus-GMiniR?
It is a palm-sized dual-frequency RTK-GNSS receiver for use by connecting via Bluetooth to "[AgriBus-NAVI](https://agri-info-design.com/agribus-navi-2/)", a GNSS/GPS guidance application for Android that is installed on agricultural vehicles such as tractors and combines to assist "straight and even travel" in the Cultivated land.
**High-precision positioning with dual-frequency RTK-GNSS module**
Equipped with u-blox ZED-F9P dual-frequency RTK-GNSS module.
Ultra-high precision positioning in centimeter-level is possible.
The "AgriBus-GMiniR" can be used as both a reference station and a mobile station with RTK positioning.
**Equipped with gyroscope and posture sensor**
The gyro sensor provides highly accurate path prediction, and the attitude sensor intelligently compensates for deviations between the antenna position and the ground surface position caused by inclination.
This minimizes positioning errors and improves the efficiency of agricultural work.
---
# Overall composition
**When using as a mobile station
(When a reference station is also installed and the correction information transfer service is used.)**
- By using the correction information of the reference station, it can achieve centimeter-level ultra-high accuracy positioning.
It can be used in sowing operations.
- To use the correction information transfer service "[AgriBus-Caster](https://agri-info-design.com/agribus-caster-2/)", you need to subscribe to "AgriBus-NAVI" Standard Plan.
- When achieving ultra-high accuracy RTK positioning, the distance between a mobile station and a reference station should be "roughly 10 km or less.If the distance is farther than that, there is a possibility that the error will be FLOAT, but if you are aiming for an error of "within 3cm", a distance of about 20km is not a practical problem.
In some cases, users have been able to FIX even at a distance of 50km.
- To use the correction information transfer service, your smartphone/tablet must be able to connect to the Internet.
**When using as a mobile station
(When not using the correction information transfer service)**
- The accuracy will be lower than when using the correction information transfer service. It is a sub-meter level positioning. It can be used for tillage, soil breaking, and land preparation.
---
# Configuration of this product
### included items
- Main unit of AgriBus-GMiniR
- Dual-frequency high-performance active antenna (antenna and cable integrated / cable length 5m)
- USB power cable (1.5 m)
### Individual parts drawing
**AgriBus-GMiniR main unit**
**Dual-frequency high-performance active antenna (antenna and cable integrated / cable length 5m)**
**USB power cable (1.5m)**
### Description of the unit
**USB / POWER-IN**
Connect the included USB power cable and power it up to start.
**GNSS-ANT**
Connect the supplied dual-frequency high-performance active antenna (antenna and cable integrated / cable length 5 m).
**STATUS (LED)**
Indicates the status of the unit.
- Lit : Bluetooth connection in progress
- Blinking : Bluetooth connection not established
**EXT**
Port for expansion. Cannot be used at present.
**Other**
The main unit is not waterproof. The attached antenna is waterproof.
---
# Installation Method
### AgriBus-GMiniR main unit
- Prepare an environment that can be powered by the supplied USB power cable, such as a cigar-socket type USB charger or mobile battery.
- The main unit is not dustproof or waterproof. Please wrap it in a plastic bag, especially when installing it in a vehicle without a cabin.
- The main unit should be mounted on the vehicle so that it is stable, avoiding places where it may vibrate.
- Make sure that the USB power cable and antenna cable are not bent or otherwise overloaded.
- There are no restrictions on the direction in which the main unit is installed. You can set the orientation in "AgriBus-NAVI" when you use it.
### GNSS Antenna
- The antenna is waterproof. The antenna should be installed horizontally in an open area, such as above a cabin. The antenna should be placed in an unobstructed position with an elevation angle of about 15° above the horizontal plane of the antenna.
- The antenna cable length is 5 meters. Install the antenna carefully.
- It is recommended to place an iron ground plane (10-20 cm in diameter) on the bottom of the antenna to stabilize the positioning. The antenna has a built-in magnet for easy installation and removal.
- In order to prevent the antenna cable from tearing, it is recommended to use a commercially available corrugated tube (5-7mm diameter) or other protective material.
- Please consider using the rear glass, the back of the cabin, or a wiring plug for work equipment.
- There are no restrictions on where the antenna can be placed. The position is set by "AgriBus-NAVI" at the time of use.
**Installation example**
**※. Points to note**
- The antenna cable is thin, so please be careful not to tear it when pulling it in.
- If you tighten the connection between the antenna and the main unit too tightly, the cable inside the main unit may come off.
- The cable may become a hindrance when getting in, out, or driving. Please use a commercially available guide or other means to avoid traffic lines and ensure safety.
---
# How to use
### Updating the firmware
Please make sure to update the firmware to the latest version in "AgriBus-GTools" before use. The firmware release will be announced on our website and Facebook. For the update procedure, please refer to [AgriBus-GTools User's Manual (public version)](https://docbase.io/posts/2142104/sharing/3f057607-9082-4934-a5e1-399409fdc42d).
### Switching to a mobile station
Switch the operation mode of the main unit to "Mobile station" with "AgriBus-GTools". For the procedure of switching, refer to [AgriBus-GTools User's Manual (public version)](https://docbase.io/posts/2142104/sharing/3f057607-9082-4934-a5e1-399409fdc42d). ※. In the shipping state, the operation mode is "Mobile station".
### Setup Method
1. connect the USB power cable to the main unit and turn on the power.
2. After turning on Bluetooth on your phone/tablet, start "AgriBus-NAVI".
3. Tap the Settings button at the bottom left of the guidance screen.
4. Select "AgriBus-GMiniR" in [GNSS]-[GNSS acquisition method].
5. Select the device to be connected in [GNSS]-[Bluetooth Device].
If you have more than one connected device, please check the device name with "AgriBus-GTools". After selecting the device, check that the LED on the main unit is lit and the connection is established. If you cannot find the device, tap "Find device".
6. You can set the antenna position (X, Y, Z) in [Vehicle]-[GNSS Antenna Position].
You do not need to set "Azimuth Offset for Multi-Antenna GNSS".
7. Set the orientation of the device in [Vehicle]-[Mounting direction of GNSS device].
After selecting the orientation of the bottom of the device and the surface of the device facing the direction of travel in that order, tap the [Measure left/right/forward/backward tilt] button.
8. Set the drift correction value for the gyro in [GNSS]-[Gyro Adjustment].
Tap the [Measure drift correction value] button while the vehicle is stationary.
9. The guidance screen is displayed.
Make sure the GNSS status in the upper right corner of the screen is set to SINGLE or D-GNSS. Depending on the firmware version of the u-blox ZED-F9P dual-frequency RTK-GNSS module installed in the device, the status will be either SINGLE or D-GNSS.
10. In [Orientation & Posture] - [Smoothing], set the parameters as needed.
If the guidance wanders from side to side, increase the value of each parameter to make it smoother.Normally, there is no problem with the recommended values.
### When using the Correction Information Transfer Service
The correction information is available by subscribing to the "AgriBus-NAVI" standard plan. 30 days free trial is available, so please try it out.
1. In [GNSS]-[GNSS Correction Information], check [Use GNSS Correction Information].
- When using "AgriBus-Caster "
- Use My Reference Station
Select this option if you want to use your own mount point.
- Use a shared reference station
This option is only available for Enterprise Plan subscribers. Select this option if you want to use a shared mount point.
- When using "other means of communication"
- Ntrip V1
Select this option when you want to connect to another company's correction information transfer/distribution service, etc. via Ntrip. Set the host name, port number, mount point, user name, and password as appropriate for your environment.**There has been an increase in the number of user name and password input errors. Please set them carefully.**
- TCP RAW
Select this option when you want to connect to another company's correction information transfer/distribution service via TCP. Set the host name and port number according to your environment.
2. The guidance screen is displayed.
Confirm that the GNSS status in the upper right corner of the screen is "FIX" or "FLOAT". The status will be either "FIX" or "FLOAT" depending on various conditions such as the position of the satellite.
### Notes.
- It is recommended that you do not put any unnecessary applications on your phone/tablet.
- If Bluetooth or Wi-Fi is not working properly, it may be caused by security software. Please stop the operation temporarily and try again.
- If your phone/tablet is running slowly, it may be caused by the security software mentioned above, as well as carrier-provided apps. Please try stopping this application and restarting your phone/tablet.
### Reference Information
[Here](https://docbase.io/posts/1873502/sharing/a4626719-dd70-4d0f-baf2-5891b7dc42a5) is a list of smartphones/tablets that we own and can confirm the operation of the application.Please use this information as a reference when purchasing a smartphone or tablet.
※. This is a list of smartphones/tablets that we are able to check the operation of when we are notified of a problem. This does not mean that we can guarantee the operation of all of them.
---
# Frequently Asked Questions
### What antenna do you recommend?
The "AgriBus-GMiniR" comes with an antenna as an accessory, so there is no need to prepare it separately.
### I would like to purchase the antenna separately.
If you would like to purchase antennas for AgirBus-GMiniR separately, they are available for 12,000 yen (including tax and shipping) per unit. Please contact us at the following address if you wish to purchase one.
contact@agri-info-design.com
### How far away can the mobile station be from the reference station?
When achieving ultra-high accuracy RTK positioning, the distance between a mobile station and a reference station should be "roughly 10 km or less". If the distance is farther than that, there is a possibility that the error will be FLOAT, but if you are aiming for an error of "within 3cm", a distance of about 20km is not a practical problem. In some cases, users have been able to FIX even at a distance of 50km.
### How can I use AgriBus-Caster?
The correction information transfer service "AgriBus-Caster" can be used by subscribing to the Standard Plan/Enterprise Plan of the "AgriBus-NAVI" application.
### Can I use another company's correction information transfer/distribution service?
Yes, you can use other companies' correction transfer/distribution services such as RTK2GO without using "AgriBus-Caster". However, please note that this is not supported by us.
### Is it necessary for mobile stations to have an Internet connection?
If you want to use the correction information transfer/distribution service with "AgriBus-NAVI", you will need internet connection on your smartphone/tablet. Please prepare a separate mobile contract in advance.
### What should I do if I can't connect with AgriBus-NAVI?
- Please check that "AgriBus-NAVI" and "AgriBus-GTools" are the latest versions in Google Play.
- Turn on the power to "AgriBus-GMiniR" and check if the LED on the main unit is on/flashing.
- Please upgrade the firmware of this "AgriBus-GMiniR" to the latest version using "AgriBus-GTools".
- Please check if the mode of this "AgriBus-GMiniR" is set to "Rover (mobile station)" in "AgriBus-GTools".
- Make sure that "AgriBus-GMiniR" is selected in "GNSS acquisition method" of "AgriBus-NAVI".
- Make sure this "AgriBus-GMiniR" is selected in the "Bluetooth devices" field in "AgriBus-NAVI".
- Please make sure that no other phone/tablet is connected to this "AgriBus-GMiniR".
### GNSS status remains "NO POS" in AgriBus-NAVI for a long time
- Please install the antenna in a place where the sky is open.
- Check that the antenna is properly connected to the main unit.
If you tighten the connection between the antenna and the main unit too tightly, the cable inside the main unit may come off.
### GNSS status is changed from FIX to FLOAT or SINGLE
There are two main reasons why the GNSS status goes from FIX to FLOAT or SINGLE: 1. when the GNSS signal condition is bad, and 2. when the correction information is not received for a certain period of time. Please check the following.
1. When GNSS signal conditions are poor
In places where it is difficult to receive signals from GNSS satellites, such as near windbreaks, next to buildings, or where the sky is not open.
2. When the correction information has not been received for a certain period of time.
If you are in a place where the signal of cell phone network is difficult to reach. If the correction information from the reference station has not reached the Internet or a correction transfer service such as AgriBus-Caster, or if there is a failure in the correction transfer service such as AgriBus-Caster.
※. We have confirmed that there is no problem even if the correction information is interrupted for about 30 seconds.
### Can I use this product for surveying?
This product cannot be used for surveying.
### How can I update the u-blox ZED-F9P dual-frequency RTK-GNSS module?
Please connect the device to a Windows PC with a USB cable and update the firmware with u-blox' u-center software.
[u-center download link](https://www.u-blox.com/sites/default/files/u-centersetup_v21.02.exe.zip)
[Firmware (HPG1.13) download link](https://www.u-blox.com/sites/default/files/UBX_F9_100_HPG_113_ZED_F9P.7e6e899c5597acddf2f5f2f70fdf5fbe.bin)
### Is it possible to output NMEA?
It is possible to output NEMA by connecting the unit to a PC with a USB cable.
---
# Product Specifications
| Item | Details |
| --- | --- |
| SIZE | H74 D34 W126 (mm) |
| Weight | 156 grams |
| I/F | Wi-Fi 802.11 b/g/n (2.4GHz only)
Bluetooth v4.2 BR/EDR and BLE |
| Function | Equipped with u-blox dual-frequency RTK-GNSS module ZED-F9P
Standalone positioning : Sub-meter Level, RTK positioning : Centimeter level
Supported GNSS : GPS(USA), MICHIBIKI(Japan), GLONASS(Russia), BeiDou(China), Galileo(Europe)
Switching between mobile station and reference station is possible with the dedicated application.
Equipped with gyroscope and posture sensor
Firmware update function |
| accessory | Dual-frequency high-performance active antenna (integrated antenna and cable / cable length 5m)
USB power cable (1.5m)
User's Manual
Warranty (1 year from purchase) |