DIY Wi-Fi GPS tracker using Xiao ESP32-S3 + Neo-6M with geofencing and SMS alerts — no SIM card or GSM module needed.
Virtual fences (built by GPS coordinates) represent the potential for animal guidance in locations where physical fences may be unfeasible.
Want to get your children and you notified if s/he leaves the playground? Just draw a geofence with your connected mobile app and feel safe.
DIY system to detect the presence of any object in a restricted area
