---
title: "NTRIP Receiver with WIZnet WizFi360 and Teensy"
url: "https://maker.wiznet.io/Lihan__/projects/ntrip-receiver-with-wiznet-wizfi360-and-teensy/"
markdown_url: "https://maker.wiznet.io/Lihan__/projects/ntrip-receiver-with-wiznet-wizfi360-and-teensy/md"
type: "UCC: User Created Content"
author: "dj1711572002"
author_url: "https://shinshu-makers.net/shinshu_makers/2025/07/07/%e3%80%90rtk26%e3%80%91wizfi360%e3%81%a7ntrip%e3%83%ac%e3%82%b7%e3%83%bc%e3%83%90%e3%83%bc%e4%bd%9c%e3%81%a3%e3%81%9f%ef%bc%9cfix%ef%bc%91%ef%bc%90%e7%a7%92%e4%bb%a5%e5%86%85%e3%81%a8%e8%b6%85/"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "dj1711572002"
original_url: "https://shinshu-makers.net/shinshu_makers/2025/07/07/%e3%80%90rtk26%e3%80%91wizfi360%e3%81%a7ntrip%e3%83%ac%e3%82%b7%e3%83%bc%e3%83%90%e3%83%bc%e4%bd%9c%e3%81%a3%e3%81%9f%ef%bc%9cfix%ef%bc%91%ef%bc%90%e7%a7%92%e4%bb%a5%e5%86%85%e3%81%a8%e8%b6%85/"
published: "2025-08-27"
language: "en"
likes: 0
views: 1600
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# NTRIP Receiver with WIZnet WizFi360 and Teensy

> High-speed NTRIP receiver built with Teensy 4.1 and WizFi360 Wi-Fi module. Achieves RTK Fix within 10 seconds compared to ESP8266’s tens of seconds.

Original author: dj1711572002 (source: https://shinshu-makers.net/shinshu_makers/2025/07/07/%e3%80%90rtk26%e3%80%91wizfi360%e3%81%a7ntrip%e3%83%ac%e3%82%b7%e3%83%bc%e3%83%90%e3%83%bc%e4%bd%9c%e3%81%a3%e3%81%9f%ef%bc%9cfix%ef%bc%91%ef%bc%90%e7%a7%92%e4%bb%a5%e5%86%85%e3%81%a8%e8%b6%85/)

## Documents and links

- [NTRIP Client for Teensy + WizFi360](https://gist.github.com/dj1711572002/50a3254921d90c3793ab1ac3e11819d6) (code): Implements AT command-based TCP connection, NTRIP request, and RTCM3 streaming.

## Article

### Software Apps and Online Services

Arduino IDE

ChatGPT (code generation support)

u-center (u-blox GNSS configuration & monitoring)

RTCM3 protocol

### Tags

WizFi360

Teensy 4.1

RTK

NTRIP

GNSS

---

## DESCRIPTION

### Project Overview

This project demonstrates building an **NTRIP receiver** using a **WizFi360 Wi-Fi module** and a **Teensy 4.1** board.
Compared to the traditional ESP8266-based solution, which required tens of seconds to reach an RTK Fix, this new combination achieves **Fix within 10 seconds** under good conditions.

The performance improvement is due to WizFi360’s **fast UART throughput (1 Mbps)** and **straightforward TCP→UART data pipeline**, significantly reducing latency and jitter.

---

### Key Features

**Ultra-fast Fix**: Achieves Fix in under 10 seconds in optimal conditions.

**Stable data stream**: RTCM3 correction data is delivered without fragmentation or delay.

**Extended capability**: SD card logging of UBX/NAV messages supported.

**ChatGPT-assisted coding**: AT command-based TCP/NTRIP connection generated step by step with AI support.

---

### Hardware Setup

WizFi360 TX → Teensy RX1, WizFi360 RX → Teensy TX1

Teensy UART1 ↔ WizFi360 (115200 bps)

Teensy UART2 → F9P GNSS receiver (RTCM3 corrections, 460800 bps)

F9P UART1 → Teensy UART4 (UBX log capture and SD storage)

---

### Software Implementation

```plaintext
// ntrip_config.h
static const char NTRIP_HOST[] = "rtk2go.com";
static const uint16_t NTRIP_PORT = 2101;
static const char NTRIP_USER[] = "your_email";
static const char NTRIP_PASS[] = "";
```

```plaintext
// AT command-based TCP connection
WF_SERIAL.println(F("AT+CIPMUX=0"));
WF_SERIAL.println(F("AT+CIPMODE=1"));
WF_SERIAL.print(F("AT+CIPSTART=\"TCP\",\""));
WF_SERIAL.print(NTRIP_HOST);
WF_SERIAL.print(F("\","));
WF_SERIAL.println(NTRIP_PORT);
```

#### Core Functionality

Streams RTCM3 binary via USB serial for validation.

Forwards RTCM3 directly to the F9P receiver to enable RTK Fix.

Logs UBX data (`NAV-PVT`, `NAV-SAT`, `NAV-RELPOSNED`) to SD card with buffering for high throughput.

---

### Network Architecture

```plaintext
NTRIP Caster (e.g. rtk2go.com)
       ↓ (RTCM3 over TCP)
WizFi360 Wi-Fi Module
       ↓ UART
Teensy 4.1
       ↓
u-blox F9P GNSS Receiver
       ↓
RTK Fix Output (USB / SD Log)
```

---

### Performance Results

**ESP8266-based system**: Typically tens of seconds to >1 minute for Fix.

**WizFi360 + Teensy**: Achieves Fix in as little as 10 seconds.

Reduced latency and jitter allow the F9P to converge faster with stable correction input.

---

### Lessons Learned

The choice of Wi-Fi module strongly affects RTK Fix performance.

ESP8266 suffers from software buffer overhead and AT command delays.

WizFi360 provides a direct and low-latency data path, ensuring consistent correction delivery.

---

### Future Improvements

Support for multiple NTRIP services (e.g., VRS, SSR).

Cloud integration for log upload and monitoring.

Multi-receiver expansion for fleet RTK solutions.

---

### Challenges & Solutions

**Challenge**: RTCM3 reception on ESP8266 was fragmented/delayed, leading to slow Fix.

**Solution**: WizFi360’s faster TCP→UART stream and Teensy’s stable clock enable smooth, rapid Fix convergence.

---

---

Source: https://maker.wiznet.io/Lihan__/projects/ntrip-receiver-with-wiznet-wizfi360-and-teensy/