Live data from Hacker News

We're making an open-source $30 GPS/mesh radio, would like advice

meshtastic.org

111–120 of 176 posts

Re: We're making an open-source $30 GPS/mesh radio, would like advice

#114
This is awesome, thanks for sharing! I'm considering using this for a project where I need to measure distance between two nodes. Couple questions:

1. You mention "location and distance" between member nodes. I assume this is based on the LORA RSSI? How precise is the reading?

2. Do you support the "TTGO LORA32"? Your Github Readme mentions it, but Pages does not.

3. Will the TTGO LORA32 and Heltec LoRa 32 measure distance without being connected to a phone?

Re: We're making an open-source $30 GPS/mesh radio, would like advice

#115
post #114

This is awesome, thanks for sharing! I'm considering using this for a project where I need to measure distance between two nodes. Couple questions: 1. You mention "location and distance" between member nodes. I assume this is based on the LORA RSSI? How precise is the reading? 2. Do you support the "TTGO LORA32"? Your Github Readme mentions it, but Pages does not. 3. Will the TTGO LORA32 and Heltec LoRa 32 measure di…

If the nodes have GPS it's fairly straightforward to calculate distance and bearing.

Re: We're making an open-source $30 GPS/mesh radio, would like advice

#116
post #62
post #39

Earlier quoted context omitted.

Solutions of hundreds of dollars? For what exactly? Reminds me of the movie Hackers where they used buzzers. And why not? The only thing you gotta do is use pre-planned keywords/acronyms. I went to several (music) festivals, big ones between 2002 till 2004 with a few smaller gigs later until 2009 or so. Back then we just used SMS or phone call. I didn't even always have a plan during the mentioned years. Especially o…

You have to look at the issue from the organizer PoV and not as the event goer. You need to have some kind of reliable communication channels for the staff. The result of 10 years of experience of trying to cause that is for me that analog UHF radios work, wired VoIP phones work and just using whatever smartphones the staff works and combination of these three technologies gives you the SLA level you need. DECT is me…

That does make sense. I did not see it from the organizer PoV indeed.

Re: We're making an open-source $30 GPS/mesh radio, would like advice

#117

Howdy, as the founder of the Serval Mesh adhoc networking protocols and hardware, what I would look for in a new radio is: 1. True packet radio mode, that doesn't hide the radioness of the link etc, but lets the programmer use it's strengths. 2. UART link, ideally using 3DR/RFD900 compatible connector (then we can include it directly in our existing systems, and so can others). 3. Field-flashable, but with robust pro…

Upvoted for the deep knowledge shared here- but as a consumer, I don't know enough to care anything about any of that. I think a mesh radio that keeps us all together on a hike, festival, or emergency situation sounds pretty cool, and being open and extensible makes it even better.

Re: We're making an open-source $30 GPS/mesh radio, would like advice

#118
post #107

This is very similar to FLARM devices ( https://en.wikipedia.org/wiki/FLARM ) for ultralights, gliders, etc. This is already broadly deployed (at least in Europe). You could check for any lessons learned there. I think you can discount any flight users, because they would like to be seen too by other airplanes.

FLARM is very bad example especialy for DIY community. They have proprietary chips, firmware and are running non opensourced protocol. Also they are actively trying to prevent reverse engineering with cryptography and killing old/diy devices with protocol timebombs...

Re: We're making an open-source $30 GPS/mesh radio, would like advice

#120
post #2

Hi ya'll, so we've spent a few weeks making device software and an android app to convert a $30 chinese gps/radio into a long range mesh radio for hikers. It is working fairly well now (though still an alpha) and we'd love more people to try it and/or have fun coding on it. We got about 30 users (and some devs from this hackaday article) but we'd love more users and devs to join this happy-happy project: https://hack…

Looks awesome! Downloading the app, going to try it out on my T-BEAM that's been sitting dusty, and will definitely have an opportunity to test it soon.
Post reply on HN