first, i made the lora gateway and lora server with the rak2245 pi hat and dragino lora shield v1.4, and i used the arduino sketch in ( https://github.com/dragino/Lora/blob/master/Lora%20Shield/Examples/lora_shield_ttn/lora_shield_ttn.ino ) and changed the keys and the device address to send data to the server and it works good using the json decoder in the following picture.
