John yes the freq is represented in three bytes. I will have to do a little research on the what you have given me. The big thing is I am working with a range from 902.0 to 915.0 in tenth increments.
RailRoader, from my research there isn't a Lora library made for the module I am using. Most of them use AT commands to change parameters. The model I have to use to match a 3rd party equipment built-in Lora radio uses Hex. Some parameters are very easy like Kbps, baud rate etc as they assigned 00x0 to 1200 baud, 0x01 to 2400, 0x02 to 4800 and so on.
Frequency is equal to the hex value of the frequency by multiplying by 1000, so 903.3 X 1000 = 903300 which is represented in Hex as 0x0D 0xC8 0x84 writing it to serial makes it binary so like lastchancename said, data is data it is sending 0's and 1's
Lastchancename, the United States 900 band is very broad provided your transmit power is less than 1 watt. The range I am working in is 902.0 to 915.0 with 100 mW max.
Steve, I am assuming you stayed with it. I just started tinkering with it again just a bit over year now. I am sure most us "mature" users know, if you don't use it you lose it.