An anchor alarm/buzzer for boats and a slaved remote that can be taken ashore. Designed to wake you up if your boat drags, even if you're on land.
Parts list:
- two Heltec v3 lora32 modules
- a ublox gps
- two active buzzers
- one rotary encoder
- three small switches SS-12F15
- 3d printed enclosures
- batteries (18650s work well)
- M2 screws and nuts (10mm for lids and 5mm switches, or you could go ham with hot glue)
Total cost around $60
Features:
- configurable alarm range
- OTA update support via wifi
- Lora radios with several kilometers of range for remote
- All night battery life on remote with 18650
