Hi Sairam,
We’re working on a new image with RPi 4 8Gb support.
At the moment, I can provide you with a workaround on how to make them work together:
- Insert the SD card with our latest image into your RPi 3A+
- Run the following commands:
sudo apt update
sudo apt upgrade
- Once the update is completed, you can use this SD card and Navio2 with RPi 4 8Gb
Please let me know if it works for you.