https://docs.rakwireless.com/product-categories/wishat/rak6421-wisblock-pi-hat/overview https://store.rakwireless.com/products/wisblock-adapter-board-raspberry-pi-rak6421
Can be used with their 1W radios and other blocks.
Yeah meshcore already has a chat room style for nodes. It works really well. I could see tastic stealing the best ideas from it.