ESP32-Based mechanical NMEA-183 wind sensor

• a5600 is used as a wind vane angle sensor
• sealed-contact is used to count wind speed sensor ticks
• Schematics

The wind sensor starts a WiFi access point, and then transmits wind data two ways:

• NMEA 0183 sentences via UDP port 9000. Counterparts available:
  • ESP-32 Wind indicator
  • [ESP8266-based UART bridge] and a charplotter Not tested on a real chartplotter
  • OpenCPN
  • Any other software able to receive NMEA-183 data via UDP
• An internal web page showing wind dial in real time. Any mobile or a laptop is able to display that at http://yanus.local/wind

Parameters to adjust

The web part of the sensor is also used to fine-tune:

• Wind angle correction
• Wind speed correction
• Wind angle averaging time
• Alarm wind angles

How to flash the main unit

The binaries are compiled for classic ESP32, but tested also on ESP32-S3 and ESP32-C3

There are multiple ways to flash ESP32. The easiest way is esptool-js.

Take binaries from the latest release.

Flash addresses for ESP32 are

File	Address
bootloader.bin	0x1000
partition-table.bin	0x8000
ota_data_initial.bin	0xd000
esp-windsensor-mast.bin	0x10000