Configuring the base manually

You can use the U-center software in order to configure precisely the behavior of the M8P chip so that it will achieve exactly what you want.

In order to configure the base, you will need:

• 1 Computer, used as ground control station

• 1 Micro USB cable

• Latest version of U-Center Software (available here)

Configuring the U-blox chip

First of all, install the U-Center software on your computer. When done, you can connect your base module to your computer. Open the U-Center software after that, and connect it to your base module using the button in the upper-left corner (receiver toolbar).

After connecting, you should be able to enter the Configuration view from the top hotbar.

After any modification made in the Configuration panel, always remember to hit the Send button at the bottom of the configuration view panel, or your modifications won't be stored!

In this menu, scroll down on the left panel to find the MSG (Messages) menu. There, open the slide down menu and pick the RTCM1005 messages. After that, check both UART1 and USB checkboxes and click on the Send button.

You must repeat these steps for the RTCM1077, RTCM1087 and RTCM1127 messages (respectively GPS, GLONASS and BEIDOU raw data) without omitting to hit the Send button each time, or your changes won't be applied. Checking both UART1 and USB checkboxes will allow the chip to send the messages either from USB or UART1, depending on your system setup.

Next, move to the TMODE3 (Time Mode 3) section on the left panel. You will be able in this section to chose whether you'll use Survey-in (if you don't have an exactly known position for your base) or Fixed (if you know the exact position of your base, either in ECEF or Lat/Lon/Alt format) mode.

In Survey-in mode, your base will determine its position by itself. You will have to set a minimum surveying time and a minimum accuracy. The surveying will last at least for the duration you set, and won't stop until it has reached the accuracy you selected. Don't forget to click the Send button after setting up the surveying.

After setting up these values, you can get to the SVIN menu to check the informations gathered by the base, as its position, time, surveying time, and other useful data. To do so, open the Messages view from the top hotbar, and scroll down to the _NAV (Navigation)_section, then look for the SVIN message.

In Fixed mode, the surveying is not done, and you have to enter the position of the base yourself, whether it be in ECEF or Lat/Lon/Alt format.

Keep in mind that having the most accurate positioning for your base will provide best results in order to compute the position of the rover module.

At this point, your base is almost set up.

You have to encapsulate raw data in your telemetry link then. This will only require you to have your base and control station (computer) connected through USB. To set this up, you will first need to save the whole configuration you've done, by getting into the CFG (Configuration) menu on the left panel, selecting all four memories on the right, and clicking Send.

You have successfully configured your base and can start using it !