over the last month i learned a lot about LoRa and LoRaWAN. About all kind of specifications and rules.
Im using a TTIG and two seperate TheThingsUno´s to collect enviromental Data like Temp/Humidity/Soil Mositure.
For my Thesis one last thing is to perform some kind of Distance Test so that i can provide information about the different SF´s and Ranges.
Before i can ask my question i need to provide a bit of background:
When im setting up my Nodes (standart QuickStart config) im sending with SF7 and 125BW. My TTIG and the Gateway of the university get the Data. The university GW is about 1,2 km far away… and still recieves the Signal with sf7 (Its stationed on a high building). So for my Testing i thought i can ride to some locations in variable distance to see if the node can send Data to the gateway. First i did not set the ADR bit. I did this now and at home it works perfectly. If i set the Default SF to 9 or 10 it will automatically set the SF to 7 after about 64 Messages. But if i set the Default SF to 11 or 12 it wont join. The otaa wont work. Ive read a lot of topics that the RN Chip has some kind of problem with joins on sf 11/12 caused by the receiving windows.
So my question is:
What is the best way to test the distance coverage? Should i let the node join the network via otaa, drive a bit farer away and wait till the adr adapts the new SF? Or should i set the Default SF to 10 and see if the Node joins the network from the new (more distance) position?
Can i change the amount of Uplinks needed for adr to take action?
How does the Node function if i join the network on 10 and drive further away… The node wont reach a Gateway anymore. Does the ttn.reset perform a “internal” ADR controlled by the node itself? Reading the specification of LoRaWAN it should. How much “failed” uplinks does it need to perform a “intern” ADR correction?
If you have any further question let me know. I understand its maybe kinda hard to understand my questions and they are sounding a bit confusing but i hope you can get my question right