Hello there,
I am looking for a ready to order PCB for a Lora node based ont he ATtiny85 or similar. I am especially interested in ready to use code samples for this node.
I am looking to make a few cheap and long lasting door sensors.
Thanks a lot for your help!
what lora(wan) module should that ATtiny connect ? remember the memory and I/O is very limited
with ’ long lasting’ do you mean the battery ?
* as far as I know a working stack that fits is never released
…a Lora node based ont he ATtiny85 or similar…
Not the ATtiny85 but if the ATtiny84a is OK then take a look at this, and combine it with this and this then you get something like this:
and this 
Thanks a ton for your replies! Those look promising. What would be the default way to realize a Lora Node which runes on batteries and just sends a message when a door contact is closed?
that depends on your programming/electronics experience.
easiest way is to buy a factory node - https://shop.factorylab.nl/product/fennec-door-count/
or read some LAB stories and edit/write new code for your use case - https://www.thethingsnetwork.org/labs/stories/node
Well I have no problem with programming, soldering, etc. I build my own node already with a Arduino Mini and the RFM95. Ideally I would be looking for a PCB now that also supports battery power.
So why don’t you use that one then… and use a magnetic contact as input
Yeah I want to do exactly that, but the Node I have now is hand soldered and takes a long time. Ideally I would like to use a ready made PCB design for that.
Ok this looks very promising. The only downside is that the software stack he is using is still under NDA.
Other than that I think this would be a nice PCB and if someone would provide a ready to run example for some sensor on this particular stack I could easly modify it for my use case.
I don’t follow.
You need a door sensor… So basically on/off… with some intelligence I assume So that when someone don’t close the door the node won’t keeps sending the same ‘door’s open’ signal. 
His firmware is adapted for very low power use… you may use that for free, but not in a commercial application without contacting him… I don’t see a problem here
It is more that I am unsure about the software stack I should be using. On GitHub they are writing that they use arduino-lmic. But this library has so many config options that I would basically need someone that sets “sane defaults that just work” for it.
yeah … you have to put some effort in your research… luckily there’s a lot to be found when using google / search here on the forum
don’t expect a taylormade solution/tutorial presented especially for you … but we are here to help when possible.
Well I was just wondering if someone had the same problem as I do and has just open sourced everything since that would be an ideal point of entry for me. PCB wise Charles has done that and I will probably order some of his pcbs. The next step would be to find a good entry point for the software side of things 
ok then… if you want to avoid using the LMIC stack you have to look at other options like nodes with RN2483/2903 chips that have buildin stacks.
There are also PCB’s and complete nodes for sale (search Tindie)
That would take the fun out of it I think I will try and adapt the lmic stack then. Thanks for your help and time!
In spanish a open door node running on batteries