Monitors the NMEA2000 bus and displays a simple dashboard of relevant sailing info.
Implemented for the Adafruit ESP32-S3 reverse TFT feather with a 1.8" TFT display and 3 buttons for driving the UI.
Relies on the very useful https://github.com/ttlappalainen/NMEA2000 library and a custom version of the NMEA2000_esp32 library for the ESP32-S3 using the internal CAN controller (external transceiver required).
Also uses the Adafruit ST7789 TFT display driver and Adafruit GFX library for drawing primitives and Adafruit BMP5xx/BME280 sensor libraries if optionally defined.
Approximate power consumption including an external transceiver and 12v to 5v buck converter is about 50mA.
Provides top-level pages for wind, logbook and AIS info (at three different ranges).
General button usage:
- The D0 (top) button cycles selection or display of additional info in the current page.
- The D1 (middle) button toggles a subpage displaying additional info.
- The D2 (bottom) button cycles between top-level pages.
All headings and courses are relative to true North and speeds are in knots. Distances are in nautical miles. By default, depth is in feet, pressure in inHg and temperature in Farenheit but the code can be compiled with USE_METRIC defined to switch to meters, millibars and Celcius.
Displays basic wind and other instrument data.
- The radial dial shows the apparent wind angle (AWA)
- Boat speed (SOG) and course (COG) are in the center in yellow.
- Apparent wind speed (AWS) and angle (AWA) are shown in red at the top with a 1 hour history graph of AWS.
- True wind speed (TWS) and angle are shown in blue at the bottom with a 1 hour history graph of TWS.
- Depth is shown to the right in green.
Buttons:
- D1 toggles to a detailed history page.
- D2 switches to the Logbook page.
The history detail page shows a 1 hour history of TWS, AWS, SOG or depth sampled every minute. The overall maximum, minimum and average values over the last hour are displayed at bottom left. The vertical axis is divided every 10 units.
- D0 button cycles through each history.
- D1 toggles back to the main Wind info page.
This page is intended to provide information for making logbook entries or radio calls.
Includes:
- Current time (UTC or Local)
- Ambient atmospheric pressure, temperature and humidity when supported.
- GPS position
- Log (trip) distance and time.
- True heading and course.
- Speed over ground and average trip speed.
- Apparent wind speed and angle
- True wind speed and direction (relative to true North).
The trip log is calculated by sampling GPS position every minute. The log distance and time are saved persistently.
Buttons:
- D0 prompts to reset the trip log. Press D0 again to confirm or any other button to cancel.
- D1 toggles to the logbook history page.
- D2 switches to the first AIS page.
This displays a snapshot of most of the above logbook data on the hour for the last 4 hours.
- D0 cycles through each entry.
- D1 toggles back to the main logbook page.
Displays a North-up graphical representation of AIS targets within the selected range.
- Speed vectors in yellow show projected position in 5 minutes.
- Targets shown in red are considered potential collision issues (closest point of approach is < 1nm within the next hour).
- Selected vessel's range, true bearing and name/MMSI are displayed in green at bottom left.
- If the selected vessel is converging, their closest point of approach (CPA) distance, bearing and time (mins) is shown in red at top right.
- Targets are removed 60s after their last report.
Buttons:
- D0 cycles through the targets (selected vessel is white).
- D1 toggles a subpage displaying additional vessel information.
- D2 switches to the Wind info page.
The additional vessel info subpage includes additional static data for the selected vessel such and length and draft. How much information is available varies for Class A or Class B reports and depends on which messages have been received.
- D0 can also be used on this page to select other vessels.
- D1 toggles back to the main AIS page.