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💬 APRS GPS Tracker

openhardware.io 23 Jan 2019, 09:16 last edited by

https://www.openhardware.io/view/662/APRS-GPS-Tracker
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battery 43 bluetooth 11 gps 5 search and resque 1 ham radio 1 aprs 1
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tbowmo Admin 23 Jan 2019, 14:25 last edited by

Interesting, please note that you need to be a licensed ham radio operator, in order to use the APRS network.
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@alexsh1 the reason i am using the 18650's is the fact i have a steady stream of them coming in for my large battery packs. I have a couple hundred that aren't dead but just aren't quite up to to the standard i am putting in my big packs.
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@nekitoss I used 3.3V pro mini with regulator removed and powered by Vin pin. Also removed leds from the pro mini. I used minicore bootloader. I used the small pir sensors and again removed the regulator to power directly from the pro mini outputs. After that sleep the node and trigger on interrupt. Send battery level once a day. Use inbuilt battery level monitor and not external components that constantly drain power to get battery level. 1.8V is 0% on the graph (not visible yet!) but I have had nodes working below 1.7V It's a matter of luck with that it seems. Hope this helps you on the right track. I'll try and help if you want. This is the latest image and still going strong after 18 months. Voltage is at 2.903V Here is photo of the test example - I need to make a case and produce more of them over winter..... Here is the same build/code of a window sensor. Similar time frame but hardly triggered.....
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Hello Tilman, this is really a very nice design. I have ordered a pack of PCBs from elecrow, based on your gerber files, and have a few questions: in your BOM you have listed 5 smd-capacitors and 7 smd resistors, but on the PCB i have solderpads for 6 capacitors and 8 resistors. Can you just explain? is there a uniflächentaster-model for 2 ways? i think i have to flash the bootloader first, do you have a tutorial for this, and a sample-sketch for the board? Thank you very much
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Please add the documents required by the CERN license used.
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Welcome to the forum @mitchdes Yes, you are correct.
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💬 APRS GPS Tracker

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