12 Jan
2020
12 Jan
'20
7:33 p.m.
I wrote my own driver for a RasPi with a LoRa + GPS board. Before I share a link, I
should warn that I created the project to satisfy my curiosities about a few different
things and making software that was easy for others to understand was not a priority.
Those curiosities:
- Can Python be used effectively at the device driver level?
- Can I teach myself how to architect software using state machines?
- Can I develop a layered communications stack?
- Can I create a mesh/multihop protocol?
My long-term goal for the project was something very much like what is described in DR’s
promo youtube video (which is why I’m here and interested in this project). Though I
never planned on doing the Web interface part. I just wanted to build the radio network.
I doubt my software will be much help to you guys, but here it is:
The driver is: https://github.com/dwhall/sx127x_ahsm
<https://github.com/dwhall/sx127x_ahsm>
and the project is: https://github.com/dwhall/HeyMac
<https://github.com/dwhall/HeyMac>
Project Status is: I have two nodes that can beacon back and forth (MAC layer) and there’s
nothing yet at the network layer.
!!Dean
On Jan 12, 2020, at 2:30 PM, Morgan Allen
<morganrallen(a)gmail.com> wrote:
Interesting, I haven't used that interrupt yet, curiously what driver do you
typically use?
On Sun, Jan 12, 2020 at 8:07 AM Dean H (KC4KSU) <dean.kc4ksu(a)gmail.com
<mailto:dean.kc4ksu@gmail.com>> wrote:
Cool, thanks.
I like to use DIO3/ValidHeader to (subtract a constant value to) get an accurate
timestamp of when a packet is received. I would need a flywire.
!!Dean
On Jan 12, 2020, at 12:28 AM, Morgan Allen
<morganrallen(a)gmail.com <mailto:morganrallen@gmail.com>> wrote:
https://github.com/Xinyuan-LilyGO/TTGO-T-Beam/blob/master/schematic/T_BeamV…
<https://github.com/Xinyuan-LilyGO/TTGO-T-Beam/blob/master/schematic/T_BeamV1.0.pdf>
Looks like PPS is connected as TIME_PULSE. LilyGO has gotten better about hooking up the
DIO pins lately and this one even has DI0-2
On Sat, Jan 11, 2020, 9:39 PM Dean H (KC4KSU) <dean.kc4ksu(a)gmail.com
<mailto:dean.kc4ksu@gmail.com>> wrote:
Is there any schematic for the pcb? It would be helpful to know if/how they connected
the GPS’s PPS signal, the SPI’s CS and the LoRa’s DIOx pins to the microcontroller.
!!Dean
On Jan 3, 2020, at 5:09 AM, samuk(a)disroot.org
<mailto:samuk@disroot.org> wrote:
Hi all
I spotted these boards yesterday: https://www.aliexpress.com/item/4000469332610.html
<https://www.aliexpress.com/item/4000469332610.html> They have onboard GPS.
It looks like Grant will try to support them:
https://github.com/sudomesh/disaster-radio/issues/33
<https://github.com/sudomesh/disaster-radio/issues/33>
So if you are thinking of buying some test hardware and have some technical skill they
might be a good choice.
I think it would add a lot to the usefulness of the devices.
I guess it would be good to have a coarse or precise setting. If I'm just driving
around day to day I may not want to be tracked, If I'm about to go and fight a
bushfire I'd probably be happy for people to know exactly where I am.
Are you planning to incorporate a GPS into the custom boards that are under development?
Thanks
Sam
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