RFM69HCW connected to Arduino Uno

Hello. I have a prototype LoRa Daughter Board that utilizes RFM69HCW transceiver module. I found an interesting blog online that covers everything courtesy of Sparkfun. Here's the link RFM69HCW Tutorial by Sparkfun.

I followed everything but the 2 RFM69HCW radios that I am working on didn't communicate to each other. When I checked my prototype board, DI0 of the RFM69HCW has no connection at all. Is it necessary to connect the DI0 to hardware interrupt pin of Arduino Uno? And also, can I connect it directly to the Arduino board if ever? Thanks in advance for whoever will shed light on this one.

As the tutorial explains those RFM69HCW modules are 3.3V logic and need to be used with 3.3V Arduinos. The UNO is a 5V logic Arduino.

The modules you have are nothing to do with LoRa incidently.

Hi @srnet yes Arduino Uno outputs 5V thats why I used also Logic Level Shifter to downgrade the voltage going to the LoRa modules. However, they weren't communicating. I noticed in the tutorial they used also the DI0 pin of the RFM69HCW which is connected to D2 of the Arduino. Is it necessary to connect the DI0? And also can I connect it directly to the Arduino Uno w/o using Logic Level Shifter? Because in the tutorial, in the Red Board hardware connections, it was shown that DI0 is directly connected to the D2 of the Red Board. Thank you!

They are not LoRa modules.

However, they weren't communicating. I noticed in the tutorial they used also the DI0 pin of the RFM69HCW which is connected to D2 of the Arduino. Is it necessary to connect the DI0?

If the tutorial says the DIO pin of the RFM69HCW needs to be connected, then assume it does.

And also can I connect it directly to the Arduino Uno w/o using Logic Level Shifter?

You can try but it might not work.

They are not LoRa modules.

Ohh sorry RFM69HCW transceiver module. :slight_smile:

If the tutorial says the DIO pin of the RFM69HCW needs to be connected, then assume it does.

Okay then, I'll find ways to have a connection in the DI0 pin.

You can try but it might not work.

I'm just afraid that once I connected it directly, the RFM69HCW will be broken.

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