Wegmatt dAISy HAT User manual

WEGMATTLLC dAISy HAT AIS Receiver
Quick Start Guide
Thank you for purchasing the dAISy HAT AIS Receiver for Raspberry Pi.
Disclaimer: dAISy HAT is a reliable, dual-channel AIS Receiver. However, under no circumstances it
should be solely relied on for collision avoidance or navigation. It’s the user’s responsibility to use the
product prudently. Neither Wegmatt LLC nor its dealers accept responsibility or liability to the product
user or their estate for any accident, loss, injury or damage whatsoever arising out of the use of this
product.
Please refer to the manual on our website http://www.wegmatt.com for more detailed instructions.
Installation
The dAISy HAT communicates with the Raspberry Pi through the serial port pins (8, 10) on the expansion
header. By default, the serial port of the Raspberry Pi is used for Bluetooth and must be reconfigured.
Raspberry Pi OS
If you are running Rasperry Pi OS, use the uart_control shell script by Ilker Temir to configure the serial
port. Open a terminal window on your Raspberry Pi and execute the following commands:
wget https://github.com/itemir/rpi_boat_utils/raw/master/uart_control/uart_control
chmod +x ./uart_control
sudo ./uart_control gpio
sudo reboot now
After completing the reboot, AIS data is available using the following parameters:
Serial port
/dev/serial0
Baud rate
38400
Data bits
8
Parity
None
Stop bits
1
Flow control
None
Use this information to configure OpenCPN or other programs. Keep in mind, that only one application
at a time can consume serial data. dAISy immediately starts receiving AIS messages when powered up.
When connecting to dAISy with a serial terminal (e.g. screen), you can press ESC to enter a debug and
configuration menu. In this menu you can control the function of the 2nd serial port.
OpenPlotter
If you are running OpenPlotter, use the Serial app to configure the connection with the dAISy HAT.

First enable the serial port by clicking the UART icon and reboot the Raspberry Pi. The serial port is now
connected to the dAISy HAT and you should see a new device ttyAMA0.
On the Devices tab, select the line with ttyAMA0 and give it an alias (for example daisy) and select
NMEA0183 from the data dropdown, then press Apply.
On the Connections tab, select the ttyAMA0 device and click Add to Signal K, select the Baud Rate of
38400, then press AUTO. Signal K, OpenCPN and other applications on the OpenPlotter image should
now receive AIS data.
LED status indicator
dAISy HAT features two red/green LEDs to indicate its status of each AIS channel.
Indicator
Description
Green, short flash every 5 seconds
Channel is in reception mode
Green, ¼ second flash
Channel received a valid AIS message
Red, ¼ second flash
Channel received an invalid message
Red, permanently on or fast continuous blinking
Device error
No LED activity
Device is not in reception mode
Troubleshooting
Problem
Solution
No activity of the status LEDs
Verify that the HAT is properly seated.
Device in reception mode, but no valid AIS
messages received (no ¼ second green flashes)
Verify antenna connection and location.
Good AIS reception requires line-of-sight, verify
your setup from a location that is certain to have
traffic, e.g. near a harbor.
Device indicates valid AIS messages (¼ second
green flashes), but no messages received on the
Raspberry Pi.
Verify that the serial port shows up, if not verify
the hardware configuration. Verify the serial
configuration of your software. Verify the serial
communication with a program like screen.
Software receives positions, but fewer than
expected and/or with worse range than
expected.
Verify antenna connection and location. Good AIS
reception requires line-of-sight. Move the
antenna away from sources of RF noise.
After some time, dAISy indicates a device error
(fast blinking red LED)
This should not occur with the dAISy HAT. Power
cycle the Raspberry Pi to resolve the issue.
If a problem persists or frequently reoccurs, don’t hesitate to contact us at [e-mail].
Contact
[email protected]m
http://www.wegmatt.com
Wegmatt LLC
6356 138th Ave NE #212
Redmond, WA
United States of America
Designed and assembled in the USA