SparkFun RTK EVK (Evaluation Kit) Schematic v1.1
Schematic for the SparkFun RTK EVK featuring ESP32-WROVER-IE, u-blox ZED-F9P RTK GNSS, NEO-D9S L-band receiver, and W5500 Ethernet with PoE support.
Overview
This schematic provides the detailed circuit design for the SparkFun RTK Evaluation Kit (EVK), a high-precision GNSS development platform. The architecture is powered by the Espressif ESP32-WROVER-IE module and integrates dual u-blox GNSS modules: the ZED-F9P for multi-band RTK and the NEO-D9S for L-band satellite corrections. Connectivity features include a WIZnet W5500 Ethernet controller with SilverTel DP990X Power over Ethernet (PoE) capability, a Microchip USB2514B USB 2.0 hub, and a CH340C USB-to-UART bridge. The design also incorporates a microSD card slot, level shifting via the SN74AVC4T774PW, and power regulation using the AP7361C-33 LDO.
Use Cases
- High-precision RTK GNSS surveying
- Autonomous vehicle navigation and positioning
- RTK base station or rover development
- IoT location tracking with Ethernet connectivity
- Satellite-based correction service integration (L-band)
Topics
Referenced Parts
AP7361C-33
Diodes Incorporated
GND GND GND AP7361C-33
ESP32-WROVER-IE
Espressif Systems
ESP32-WROVER-IE
USB2514B
Microchip
USB251XB_USB2514B
CH340C
WCH
CH340C
NEO-D9S-00B
u-blox
U-BLOX_NEO-D9S-00B
ZED-F9P
u-blox
U-BLOX_ZED-F9P
DP990X
SilverTel
POE_PSU-DP990X
| SN74AVC4T774PW | Texas Instruments | SN74AVC4T774PW |
| W5500 | Wiznet | W5500 |
| AP7361C-33 | Diodes Incorporated | GND GND GND AP7361C-33 |
| ESP32-WROVER-IE | Espressif Systems | ESP32-WROVER-IE |
| USB2514B | Microchip | USB251XB_USB2514B |
| CH340C | WCH | CH340C |
| NEO-D9S-00B | u-blox | U-BLOX_NEO-D9S-00B |
| ZED-F9P | u-blox | U-BLOX_ZED-F9P |
| DP990X | SilverTel | POE_PSU-DP990X |