Review on MMDVM Hotspot Board + Aluminium Case: Ultimate Support for UHF VHF, P25 DMR YSF DSTAR NXDN POCSAG on Raspberry Pi-Zero W, Pi 3 by Sam Pullen

I bought this and added it to my Raspberry Pi Zero + Wireless. The instructions aren't very clear, but once you turn it on, you'll need to use a computer with Wi-Fi (not your desktop if it doesn't have Wi-Fi) and log into the device at the given IP address. You can then configure for your network. I forgot that if you are using a "hidden" network, you need to make the network visible so the Pi can see it. Configuration was easy, although it did require some google searches and reading a few docs to get it working properly. And since I only wanted to use it for Dstar, it took a few more searches. I'll probably buy another one for on the go - as soon as I get another radio with Dstar support.