Need help about the Ping Pong example with stm32l053 and LoRa module sx1272

Hi,

I am working on a project about LoRa expansion board, I have an stm32l053 Nucleo and an I-NUCLEO-LRWAN1 with a sx1272 transceiver.

I am trying to compile the PING PONG project from STM32CubeExpansion_LRWAN_V1.1.5, but each time there is RX_TIMEOUT that appears on the terminal (termite or terra term or even Putty). And we have no communication between our 2 modules. We tried do make some modifications, such as those shown in the link below:

https://l.facebook.com/l.php?u=https%3A%2F%2Fgithub.com%2FUSIWP1Module%2FUSI_I-NUCLEO-LRWAN1&h=ATOezg6d55-Q3zXRyCjKVT8m-iqADBfayhvuqw8Sdse6s4K5NcBsXWXXciaggQplCwzI0kwLgEnAxXnvqOqvY5RPKqygI6lP_3WWVtDJF6npPcZFXX4

We also tried to run the code and verify that there is a transmission with a spectrum analyzer, but nothing appeared.

We were trying to understand the functioning of the ping-pong example to understand how the transmission with LoRa Module works. Because our target is to enable communication between 2 LoRa module, one as a master (its mission will be to collect the data of the different sensors and transmit it,) and the other one as a slave (its mission is to receive the data of the master and then transmit it with Uart to the PC).

If you may want help us to find a solution to our problem.

Thank you.