Daniel Kleppner, a renowned physicist who made significant contributions to atomic physics and quantum computing, passed away on June 16, 2025, at the age of 92. He was best known for his work on hydrogen masers, which laid the groundwork for the Global Positioning System (GPS), and his pioneering research on Rydberg atoms and Bose-Einstein condensation. Kleppner spent nearly four decades as a professor at the Massachusetts Institute of Technology (MIT) and received the National Medal of Science in 2006. His final words were a toast to the future of science at his grandson's high school graduation party.
It is a solar-powered communication node that integrates the XIAO nRF52840 Plus main controller, the Wio-SX1262 LoRa module, and the XIAO L76K GPS module. It is specifically designed for areas without network coverage. With a built-in battery, it supports long-distance communication, precise positioning, and low-power operation. It's suitable for expanding network coverage in outdoor areas.
A tutorial on how to flash Meshtastic with the Fancy UI firmware on the LILYGO T-Deck Plus, including detailed steps and troubleshooting tips.
>T-Deck Plus, flashed 2.5.4.8d288d5,
>then went into configuration set GPS pins
>- RX 44
>- TX 43
>- enabled GPS
>then went into configuration set GPS pins
>- RX 44
>- TX 43
>- enabled GPS
The project involves a software-defined GPS receiver using the legacy C/A code to produce clock bias and location estimates. It can run from pre-recorded sample files or an RTL-SDR with a web-based dashboard for visualization. The project is written in Python, utilizing libraries like aiohttp, NumPy, Pydantic, and pyrtlsdr.
The article describes a project where someone developed a software-defined GPS receiver from scratch using Python and an RTL-SDR dongle. The project tackles the 'coarse' positioning capability of GPS, achieving location resolution within 24 seconds from a cold start. The article highlights the project's accessibility and potential as a starting point for further exploration of GPS technology.
T-Beam Meshtastic is a wireless module with ESP32, LoRa, GPS, WiFi, and Bluetooth capabilities. It features a 0.96-inch OLED display and supports various frequency bands including 433/868/915/923Mhz.
Google researchers demonstrated the ability to use GPS signal measurements from millions of anonymous Android mobile devices to map the ionosphere with high accuracy, potentially improving GPS navigation worldwide.
A blog post about a portable starmap project built using Arduino. The project includes a round LCD display, GPS module, and star chart data stored in a flash memory chip.
