Seeeduino LoRaWAN + Seeeduino V4.2 with Lora Grove

Im fighting to create a P2P communication between a Seeeduino LoRaWAN and a Seeeduino V4.2 with Lora Grove.

I have initialized both sides.
On the Seeeduino LoRaWAN side : Server, I used the LoRaWan.h package and the example : p2p_rx
The config is
lora.initP2PMode(868, SF12, BW125, 8, 8, 14);
and I m waiting for a signal with
memset(buffer, 0, 128);
length = lora.receivePacketP2PMode(buffer, 128, &rssi, 1);

On the Seeeduino V4.2 with Lora Grove - Client, I have plugged a 868 MHz Grove on D10-D11.
I use the RH_RF95.h package with SoftwareSerial
SoftwareSerial SSerial(11, 10);
It does initalize
I set the frequency
and send
uint8_t data[] = "Hello";
rf95.send(data, sizeof(data));

No success so far… What I do wrong ?

Does the Arduino serial console have any logs?

The emitter confirms sending.
The server doesnt show anything.