GPS TIME SERVER / ESP32 APPLICATION
GPS NTP Server
rust based ntp gps based server for esp32
About this project
About this project
A stratum-1 time server built from three Adafruit FeatherWings: an ESP32-S3 TFT Feather, an Ultimate GPS board and an adlogger board. Rust firmware with two targets — ESP-IDF for the device and a host build for pure-logic unit tests — parses NMEA RMC/GGA with checksum validation, timestamps the PPS pulse on GPIO12 through an interrupt, and steers an NTP server answering UDP/123. The display pages cover time, satellites, PPS and battery, with a 15-second auto-blank. Measured against a GPS-disciplined Pi it sat within about 1.5 ms, and a validation script checks stratum, leap indicator and an offset tolerance of 100 ms by default.
From the README
From the README
- Input
- PPS GPIO12 | ISR timestamp
- Firmware
- Rust firmware for a GPS-disciplined NTP server
- Build
- Default target/chip is configured for ESP32-S3
- Accuracy
- within ~1.5 ms of the local GPS-disciplined Pi reference
Hardware
Boards: ESP32
ESP32-class board. Verify the exact board revision, display, power source and wiring in the upstream build guide.
Media credit & rights
Upstream project media · rights remain with its owner · Credit: tim-oe
Screenshots from the upstream README. Code and firmware were not executed. License notices are included.
View original source ↗ Copyright & removal · Reviewed
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Repository links do not imply author endorsement or verified hardware compatibility. Check the upstream safety guidance before powering or flashing a build.