Mail ons

2 channel AIS Receiver (DAISy) for the Raspberry Pi


Raspberry Pi, as well as the required antenna are not included.

In stock (can be backordered)

Category: Tags: , , , ,

Receipt of raw AIS data does not have to be expensive, with a Daisy AIS Hat for Raspberry PI in combination with an antenna with a free line of sight to water you can fairly simple gain insight on what is sailing in your surroundings.

  • Specification:

    • True two channel receiver, continuously receiving on AIS channels A (161.975 MHz) and B (162.025 MHz)
    • Superior sensitivity compared to other low-cost AIS receivers
    • Low power, less than 200mW in receive mode (<40mA at 5V)
    • 38400 baud serial output in industry standard NMEA format (AIVDM)
    • Communicates with Raspberry Pi via UART0 (serial0)
    • Works with Raspberry Pi 1 (A+/B+ only), Pi 2, Pi 3 and 4 (see note below), and Pi Zero
    • Shape and size compliant with Raspberry Pi HAT standard
    • Breakout pads for 2 independent TTL serial outputs, 3.3 and 5 volt rails, and Raspberry Pi I2C port
    • SMA antenna connector
    • SMA-to-BNC adapter and hex standoffs included

Note: On the Raspberry Pi 3 and 4, UART0 is occupied by the built-in Bluetooth radio. Bluetooth may not be available when using the dAISy HAT.

dAISy can easily be combined with OpenCPN and OpenPlotter

OpenCPN, an open source chart plotter and navigation software, can be used with receivers like dAISy to track ships on a map. Any software running on the Raspberry Pi that accepts AIS data from a serial input will work with dAISy.

Several of our customers built chart plotters based on Raspberry Pi, OpenCPN and dAISy. A detailed step-by-step recipe can be found here.

With Kplex the Raspberry Pi can be setup as a NMEA server that distributes AIS to other devices on your network, like for example via WiFi to a navigation app running on an iPad or Android tablet.

Disclaimer: WE DO NOT RECOMMEND to rely solely on dAISy for navigation and collision avoidance!

Screenshot of OpenCPN with dAISy as AIS receiver


Sending date to lifeguardtracking/AISHub of MarineTraffic

The dAISy HAT works perfectly to send messages in the standard NMEA format to services like, AISHub, or MarineTraffic

Ships reported by MarineTraffic station 1492 in New York.




dAISy in comparison:

With our open source work, we pioneered a new category of AIS receivers designed around the SiLabs EZRadioPro single chip radio IC. This architecture is instrumental for the very low price, small form factor and low power consumption. The trade-offs are longer acquisition time, lower sensitivity and less range than some traditional AIS receivers.

Field tests with conventional dual-channel AIS receivers showed, that under good conditions the dAISy HAT can be on par with some models (e.g. SmartRadio SR162) while still being outperformed by others (e.g. advanSEA RX-100). However dAISy clearly outperforms all sub-$100 receivers that we have tested so far (Quark-elec, MarineGadget).

Our observation is, that with a good antenna dAISy is well suited to monitor local ship traffic. If you need maximum performance and are willing to pay for it, go with a receiver from the established brands.


Our AIS receivers are professionally assembled in the USA. We offer a 6 month warranty on the product (excluding physical or water damage). Please contact us if your AIS receiver prematurely fails or if you encounter any other technical issues.


dAISy HAT will be shipped after receipt of payment.



Should you have any questions, you can always contact us




There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.