6 Apr
2020
6 Apr
'20
11:02 a.m.
The "off grid" part, will need a good
battery, small solar panel,
sealed case of some type.
I did a BOM and a rough how-to for a LifePO4 system here:
https://hackaday.io/project/170069-disaster-radio-lora-mesh
I'm still waiting on the charge controller, but have assembled a system to the same Ah
with 20w solar which is working well.
You could use Lithium ion, but in a boiling hot box on a sunny roof they may be a bit
explody.
In the UK I think a 20w panel should do, with the most agressive power-saving
(Underclocking to 80Mhz and only using BLE)
2p
Sam
Once you know the power draw of the device, you can calculate the rest.
Anyone know if an "electric sheep fence" unit would be enough for a
few days of no sun operation? Those come in nice units with small
solar panel (40W?) battery, charge controller sealed for outdoor use
and are widely available at farm stores, no electronic skills needed,
but probably around 100 euros is my guess.
Good luck to all of us, and welcome Antoni! Please keep us updated on
your progress, a lot of people learn.
Best wishes, and stay safe.
Respectfully
Blake
On Mon, Apr 6, 2020 at 12:28 PM grant <ggallo102(a)gmail.com> wrote:
Hello Antoni,
We have a list of supported development boards on our wiki
https://github.com/sudomesh/disaster-radio/wiki/Devices--&-Hardware
The best board to use right now is the LILYGO TTGO v2, which you can find on ali express
https://www.aliexpress.com/item/4000396836096.html
The TTGO can operate at 868Mhz, which is what I believe is the correct frequency for the
EU, but
someone who knows more can correct me.
If you order the exact link I provided, the board should arrive pre-flashed with the
disaster radio
firmware, though it will be an old version, so it may be best for you to learn to flash
them
yourself, especially if you plan on deploying a lot of them.
Also, you gave me an idea to allow configuration of the LoRa frequency through the
console or web
gui. I'm going to open an issue for this right now,
Thanks and let me know if there are any other question we can answer,
-grant
On Mon, Apr 6, 2020 at 10:00 AM <nerd(a)linux.pl> wrote:
--
----------------------------------------------------
Blake Girardot
OSM Wiki - https://wiki.openstreetmap.org/wiki/User:Bgirardot
HOTOSM Member - https://hotosm.org/users/blake_girardot
skype: jblakegirardot
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https://sudoroom.org/lists/listinfo/disasterradio Hello,
I'm not electronic man. I would like to start using disaster radio.
What I must buy, I need offgrid and full autonomic device.
I live in Poland. Which device is good for my country? Which band? etc.
Thanks
Antoni
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