remote AIS receiver/repeater - part 2 - AIS receiver

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TL;DR
* dAISy AIS receiver running at 3.3v  3.7 - 4.2V and direct serial output
http://www.wegmatt.com/
* homemade 5 element colinear at 162MHz or Moxon rectangle (reception azimuth is limited)
http://arundale.com/docs/ais/aerial.html
http://w4.vp9kf.com/moxon_calculate.php




Originally I used a Raspberry Pi and RTL-SDR dongle to receive AIS messages at home, but this requires too much power for solar operation if my receiver/repeater is going to live on a remote hilltop

I have settled on a small standalone receiver called dAISy http://www.wegmatt.com/. Purchased from Tindie, not yet arrived from the USA.

The creator has been very helpful answering some technical queries about boot times, power management and reception advice.

The unit can be powered from 3.3v and output AIS messages over TTL serial. Power <20 mA@5V (untested at 3.3v)

Receiver is apparently easily desensitied by nearby transmitters, so need careful placement away from the LoRa transmitter