Hi all! I have been playing with TTN for a week now and I have a working PROMINI (3,3v, 8mhz, 328) + RFM95 + u-blox GPS node. Everything is working as expected and I have been tracking my activity for a 2 days. The range is excelent btw, had some 10km+ frames near Lopik, NL (Gerbrandy tower) using a simple 86mm wire as an antenna.
I registered my device using ABP and I send 1 frame every minute (only while traveling ± 100 frame per day), packing the GPS data into 2x32bit integers thus sending 8 bytes per frame.
This weekend everything stopped working after one of my soldering joints to the RFM95 module broke. After resoldering the joint everything seemed to work (checked using serial monitor) but I did not receive any frames in the TTN console. I was afraid I bricked something leading to the antenna so I checked the 868mhz spectrum with an RTLSDR stick and everything seemed in order. Still no data om TTN though, not even while driving from Lopik to Utrecht (passing the Gerbrandy tower and having a LOS most of the trip)…
Today I added a new ABP device in the TTN cnsole and uploaded the new keys to my Arduino… And everything started working again! Does anybody know what might have happened? Is this expected behaviour using APB and would this be solved using OTAA? Could the node have been rate limited without warning?
I am very happy everything is working again but I’m not sure how to prevent this in the future. Does anyone have a clue?