Data length and Invalid Parameter problem

[AntoineGirafe]

Hello there !

I'm using an RN2483 module with a board I made around an ATmega 328p with your LoRaWAN Library.

I would like to know is there any payload limit ?
When I use a small payload, everything is working fine (like 70 bytes for instance) but when I tried to reach an higher payload ( 100 to 200 bytes) it's not working anymore.
I know this problem is probably not related to your library but maby do you have an idea to help me.

I learned from your library that I got an "invalid parameter" error from the module when I tried to send this value.

I looked up to the LoRaWAN datasheets (7.1.6 of LoRaWAN™ Specification document) about the payload but I'm normaly at the right value :

• For a DataRate=5 (I guessed it from your library), the value of the payload max is of 230 bytes or 222 bytes (depending of the FOpt field, I don't know what it is but anyway I'm below this value so I don't think it's the problem here).
• Moreover, why did I get an invalid parameter error instead of an invalid data length ?

If you have any idea or advice, I will be glad to hear it
Thank you,
Regards,
AntoineGirafe