Review on 📡 MMDVM Duplex Hotspot Module Dual Hat with OLED Display V1.47 - Supports P25, DMR, YSF, NXDN - Raspberry Pi Compatible (with OLED) by Brandon Boones

I installed this modem on R-Pi 3B+. With the help of the modem file offered by the seller, the modem did not work at all. Another buyer suggested using a Mega Raspberry Pi (GPIO) DV modem configuration and that solved most of the problems. The remaining problem was the lack of sound. I spoke to the Elmers for several days and no one answered. I decided the board was bad and asked Revain for a replacement. While waiting for a replacement, I touched the TX antenna and suddenly my FT3D caught fire! I don't know if the antenna is defective or if it's cold soldering. It wouldn't work at all if I didn't touch it. The new board arrived today. I put it on R-Pi and everything works as expected. I gave this modem multiple stars due to the modem's misleading settings, the faulty antenna, and the price (a bit pricey).