Use ESP32 (ESPrtk) as NTRIP Server for Basestation RTK 'Bridge. - The Combine Forum
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Use ESP32 (ESPrtk) as NTRIP Server for Basestation RTK 'Bridge.

(This article uses ESPrtk 2.5.3 – Window PC – Google Chrome Browser).

In this tutorial, I will use ESPrtk to send RTCM data to NTRIP Caster.
I will choose (free server from SNIP) as an example.

Create a name (mountpoint) for the Base station.
I have intended to use “00_ESPrtk_M2QjZ” to name (mountpoint) for Base station. The name for the mountpoint needs to be unique (different from the previously registered names), and follow some rules :
Visit , check to see if the name has been used by someone else.

They are arranged in alphabetical order. Checking all the mountpoint names, I see “00_ESPrtk_M2QjZ” was not used and I can choose it to name my station.

Connection model :

Connect ESPrtk with Drotek F9P Board – F9P-ZED-Ublox .

Connect ESPrtk with SparkFun GPS-RTK Board –ZED F9P (Qwiic) .

Connect ESPrtk with Navspark NS-HP-GN from Skytra.

Open Web Configure.

Hold down the CWB button, then press the Reset button (then release), continue to hold down the CWB button until the blue status LED blinks, then release the CWB button.
You can now connect to the station, because the station is public (open) so you can connect without a password.
After connecting, open any browser on your device, and access to enter ESPrtk homepage.

In NTRIP Caster tab:

Caster ip:
Port :2101
Mointpoint : 00_ESPrtk_M2QjZ
Password : BETATEST
I will not choose “Auto check mountpoint conflict” because I am sure my mointpoint’s name is unique.

Select “Use custom Entry STR”, I will configure more information to tell CASTER and users (Rover) about the status of the Basestation.

Add WiFi name and password of Router (Hotspot) :

Please make sure the information is configured correctly.
Now restart ESPrtk, ESPrtk will connect to the Wifi access point and connect to server. Then, It will start send the RTCM data from RX_UART1 port to NTRIP Caster.

Accessing this address, I found my pointpoint appeared.

Visit this website , go to and click on the mountpoint called “00_ESPrtk_M2QjZ”, I will get more detailed information.

Perfect, now the Basestation is ready, Rovers can use RTCM data from it to use for its RTK applications.

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