TinkerNav RTK GNSS Board

Overview

The TinkerNav RTK GNSS Board by Tinkerbug Robotics is an open-source Real Time Kinematic (RTK) GNSS board designed for centimeter-level positioning accuracy. It combines a SkyTraq PX1105R GNSS receiver with an integrated RTK engine and an ESP32-S3 dual-core processor, making it suitable for both base station and rover configurations.

Key Features

• SkyTraq PX1105R GNSS receiver with built-in RTK engine for centimeter-level accuracy
• ESP32-S3 dual-core processor with WiFi and Bluetooth LE
• Dual-mode operation — works as either RTK base station or rover
• Multiple communication options — WiFi, Bluetooth LE, and optional LoRa radio
• Modular architecture with plugin board support via 1x10 2.54mm sockets
• Arduino IDE compatible via Espressif board manager
• Open-source hardware (KiCad, Creative Commons-Share Alike) and firmware

Power

• USB-C connection (2V-5.5V)
• JST 2.0 PH battery connector for 1S-2S LiPo batteries
• Input voltage range: 1.8V-5.5V
• TPS63070RNMR Buck-Boost converter producing 3.3V at up to 2A

Connectors and Interfaces

• SMA connector for external GNSS antenna
• 2.54mm JST XH header for GNSS I/O
• USB-C for power and programming
• 2x 1x10 2.54mm sockets for plugin boards
• Breakout pins for LoRa and custom boards

What's Included

• TinkerNav board
• JST 2.0 PH to JST/BEC LiPo adapter
• JST 2.0 PH to wire adapter

Optional Accessories

• TinkerSend LoRa Radio ($29) — plugin board for extended-range correction data transmission via LoRa

Software

The board is programmable via Arduino IDE (appears as ESP32-S3 Dev Module) or Espressif IDE. Open-source firmware examples are available for base station and rover configurations, including WiFi networking, NTRIP, and LoRa communication modes. The GNSS receiver can be configured via the ESP32-S3 or NavSpark GNSS Viewer software (default baud rate: 115200).