(This article uses ESPrtk 2.4.1 – Window PC – Google Chrome Browser).
I will use ESPrtk to stream RTCM data to my receiver.
I will choose rtk2go.com (free server from SNIP) as an example.
First, I need to check and choose a suitable base station.
Visit the page at the address rtk2go.com on port 2101 (http://rtk2go.com:2101/).
I get a caster table.
If the information is confusing, you can visit these 2 websites to check the detailed status each Basestation. (Monitor caster table decoder or SNIP::STATUS page).
OK,I will choose AA_Amman_STONEX.
Monitor caster table decoder .
It is possible to decrypt caster table information of all different services, for example, visit the website http://monitor.use-snip.com and fill in the server information as rtk2go.com with port 2101:
Click Submit, we will see the information resolved
This is a dedicated SNIP site, used to check the status information of static stations.
Visit the site http://www.rtk2go.com:2101/SNIP::STATUS for rtk2go.
Click on the mountpoint name, you will be redirected to a page with its details, for example I clicked on AA_Amman_STONEX:
You can click here to see some diagram circuit:
Because rtk2go.com is a public server, you can enter any password.
Please make sure the information is configured correctly.
Now restart ESPrtk, ESPrtk will connect to the Wifi access point and connect to rtk2go.com server. Then, It will start stream the RTCM data at TX_UART2 port .
I have make a short testing my RTK system using NS-HP-BD and ESPrtk module, with SNIP Caster (NTRIP) -Internet connection.
NS-HP-BD (Base) export RTCM3.3 then ESPrtk base send RTCM to SNIP SERVER.
ESPrtk client receive RTCM from SNIP Server and stream for NS-HP-BD Rover to get FIX correct, at the same time ESPrtk client send $GPGGA message of NS-HP-BD to SNIP Server and save all NMEA messages to SD Card.
After the test, i played the NMEA file on U-Center software.
You can see it here :
In the next posts. I will have some try with F9P (@rtklibexplorer – A first look at the u-blox ZED-F9P dual frequency receiver) or F9T (@rtklibexplorer – A first look at the u-blox F9T dual frequency receiver).