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[POTM] dAISy - A Simple AIS Receiver


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Overview dAISy (do AIS yourself) is a very simple AIS receiver that I developed from scratch. It is built around the Silicon Labs EZRadioPRO Si4362 receiver, using a Texas Instruments MSP430G2553 MC

Ain't she pretty?    

Good news for everyone having difficulties sourcing the Si4362 radio IC.   I verified that the transceiver Si4463 works with dAISy. This probably also applies to Si4460 and Si4461. Besides being mor

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dAISy USB is now available on Tindie

https://www.tindie.com/products/astuder/daisy-ais-receiver/

 

As time allows I will probably also add a booster pack and/or breakout board over the coming months.

 

Of course you are still welcome to PM me directly if you're interested in buying or building your own version of dAISy.

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dAISy USB is now available on Tindie

https://www.tindie.com/products/astuder/daisy-ais-receiver/

 

As time allows I will probably also add a booster pack and/or breakout board over the coming months.

 

Of course you are still welcome to PM me directly if you're interested in buying or building your own version of dAISy.

Congrats! Thanks for the link back.

You may want to edit your first post with the Tindie link.

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@@gmtii thanks for sharing!

Is this based on the official 3.02 firmware with auxiliary serial output? Or still your own build of dAISy?

Also, do you power the ESP8266 separately or off of dAISy? The original version's LDO is only rated for 150mA and I recently replaced it with the beefier MIC5504-3.3YM5 TR (300mA) which is able to power ESP8266. That LDO also allowed to replace the tantalum caps with regular ceramics.

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@@gmtii thanks for sharing!

 

Is this based on the official 3.02 firmware with auxiliary serial output? Or still your own build of dAISy?

 

Also, do you power the ESP8266 separately or off of dAISy? The original version's LDO is only rated for 150mA and I recently replaced it with the beefier MIC5504-3.3YM5 TR (300mA) which is able to power ESP8266. That LDO also allowed to replace the tantalum caps with regular ceramics.

 

still using my compilation based on your fw with added serial output... I have not checked the git long time ago   :(
 
The esp8266 board is powered from external source...
 
btw, my coverage has been greatly reduced because some strong qrm in the band (taxi and data services) so filtering does not help here   :angry:
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  • 4 weeks later...

Just ordered two dAISys! 

Can't wait to start working with them on my autonomous boat. My goal is to have a teensy 3.1 grab the Nmea data from the dAISy. Then at preset times have the teensy send the latest nmea string via satellite to an email address where I can decode it and be aware of local ships in the area.

 

Sort of a hybrid on-board/ off-board collision avoidance system.

 

A question, is the TTL serial output already part of the dAISy or is that an extra purchase. If it is on the dAISy, how do I access it?

 

Ahh never mind I see the TTL output in the Eagle file.

 

What type (manufacturer, type) of antenna found works best with dAISy?

 

Thanks for the great work!

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@@coolpad I use this antenna with good results

http://www.milltechmarine.com/Tram-VHF-Whip-Antenna-with-PL259-Connector_p_137.html

(requires an additional SO329 to BNC adapter)

But any marine VHF antenna should do the job. The most important factor in my experience is a clear view of the sea without major obstacles (i.e. hills).

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  • 1 month later...
  • 4 weeks later...

Sorry for not being more active on 43oh recently, dAISy kept me way busier than usual. The weekends were mostly spent with placing parts and baking PCBs, whereas weekdays evenings were spent with shipping and related email correspondence.

 

But I'm officially out of stock for the last two weeks, and while waiting for the next batch of enclosures and PCBs to arrive from China, I put together Rev B of the dAISy BoosterPack.

post-9974-0-11829800-1439267708_thumb.jpg

 

On the F5529 LaunchPad, it's functionally identical with the product I sell on Tindie. I will probably share code and BoosterPack schematics on GitHub in a month or two.

 

I built the BoosterPack for easier experimentation with the Si4362 radio IC and its brethren. Due to how AIS works (short preamble, NRZI encoding), I currently cannot fully leverage the radio's capabilities.

 

I have one spare to give away to an interested collaborator with radio experience and a clear view of the sea.

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