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 ā long lastingā do you mean the battery ?
* as far as I know a working stack that fits is never released
ā¦a Lora node based ont he ATtiny85 or similarā¦
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 donāt you use that one thenā¦ 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 donāt follow.
You need a door sensorā¦ So basically on/offā¦ with some intelligence I assume So that when someone donāt close the door the node wonāt keeps sending the same ādoorās openā signal. 
His firmware is adapted for very low power useā¦ you may use that for free, but not in a commercial application without contacting himā¦ I donāt 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 āsane defaults that just workā for it.
yeah ā¦ you have to put some effort in your researchā¦ luckily thereās a lot to be found when using google / search here on the forum
donāt expect a taylormade solution/tutorial presented especially for you ā¦ 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 thenā¦ 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 PCBās 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