esp32 & esp8266
RTK GPS on a Budget: Centimeter Accuracy with an ESP32 Rover
Standard GPS is off by 15 feet. See how an ESP32 rover and an affordable RTK kit hit half-inch accuracy for capstone and robotics…
electronic modules
M5Stack Cardputer Mesh Kit: $48 Pocket LoRa & GNSS for Off-Grid Fun
Add LoRa long-range radio and GNSS positioning to M5Stack's pocket-sized Cardputer for $48 - a handy tracker, off-grid messenger, and field tool.