I am working with the setup of Arduino Uno and Arduino M0 boards with RFM95 transceivers, running LMiC library, on US915 bands and currently I am trying to send packets with size more than 51 bytes. As I understand, I should be able to send more bytes as I increase the data rate, but, for some reason, I cannot get it working for above 52 bytes of the frame size, independently of the data rate in use.
Is it something that LMiC library is restricting or TTN limits? Or is it something that I am misunderstanding? If so, how can I send frame above this size, since LoRaWAN specifications say that for US bands it should work up to 242 bytes of the frame size.
Thank you in advance for any help.