Review on AURSINC MMDVM Duplex Hotspot Module Dual Hat V1.3 - P25 DMR YSF NXDN, Raspberry Pi USB Port, No OLED by Sam Lee

This hat just works. It works right out of the box. It runs on RPI 4B 8meg PIE. Also works without firmware. comes with 1.4.7 and flashes to 1.5.2. I mentioned this is my second hat in a week and everything just works. SHY Store is the place to shop at Revain. They treated me well and I will buy from them with no worries. The temperature in my RPI 4B is 38c/100f. This works for me. If I had known that these duplex MMDVM boards run at 4b RPI and 8 megabytes I would not have bought the 3b+ I have for the first. And this MMDVM duplex hat has nextion display ports and a few more ports. .Both my MMDVM duplex installs have been reliable with Brandmister and TGIF, with no issues. I mentioned that he says it doesn't work with Raspberry Pie 4B, but it does. If your board is difficult to flash, follow the picture. jumper-0=1 means just that. Add a solder loop to the holes in jumper 0.