rf95.init() is always failed

Hi everyone, Im a newbie and i want to sent a package use LoRa.

i just buy a arduino uno r3 and dragino lora shield v 1.4.

But when i try to test by example code (rf95_client,Lora_simple_client_arduino,...). It not work.

Serial monitor always show me "init failed".

What happen? Is my shield broken?Or i need to config the shield? if i need to config, can u help me how to config that shield. I think my frequency is 433 MHz

Thanks for reading.

Check that the COM port selected in the Arduino IDE matches the COM port where your UNO is connected.

Perehama: Check that the COM port selected in the Arduino IDE matches the COM port where your UNO is connected.

I can upload the example code to the arduino so i think COM port is correct.

This is my serial monitor

Can anyone help me please

nicknhanqua0608: Can anyone help me please

Its Draginos shield, did you try asking them ?

"init failed" is coming from the Arduino, so there is no problem with the serial monitor itself, or the IDE. You need to post ALL your code, using code tags.