AURSINC MMDVM Duplex Hotspot Module Dual Hat V1.5.2 with 0.96 OLED Display Support P25 DMR YSF NXDN DMR Slot 1 + Slot 2 for R Pi 1, 2/2b, 3/3b/3b+, 4/4b, Pi Zero, Zero 2W with USB Port (with OLED)

Straight forward configuration, worked flawlessly. I have used this hotspot with several DMR software packages and it has performed exactly as expected. RF performance and sound quality exceeded my expectations, to be honest. The value is incredible, just mount this in any cheap pre-fab housing or print your own. Connectivity and configuration are simple for someone that is interested or experienced in digital modes, it's an easy DIY and a fun way to learn something that resembles the repeater side of radio for novices.

Works great with my rasperry pi 5 8gb to operate a wpsd hot spot!

I would have given this 5/5, but the instructions for upgrading the firmware were incorrect. You only need to connect the JP1 connection to unlock the firmware for flashing. If you try to also jumper the boot connections, it will yell at you. Otherwise, awesome little product, does exactly what it says it will. And having duplex connectivity really makes things seamless.

This hotspot seems to have a lot of comments about duplex mode not working. I thought the same and almost returned it. I then had a brief brain clarity moment and said I wonder if the TX freq in WPSD is the RX freq on my radio and sure enough it worked. So the radio Tx and RX is OPPOSITE of the WPSD Tx and Rx. Also some stated that they were not sure what board to select in WPSD. I am using the "Generic MMDVM Hotspot Board (GPIO)" and have no issues. Hope that my mistakes and hours wasted can save someone else some time and frustration.

Item powers up, but is unable to be seen with either WPSD or Pi-Star, tried to detect on both OS's but neither returned a device. Firmware upgrade process also couldn't find modem or open it. Lights came on, but no one was home. Returning and trying again as this vendor has a good reputation and my Tiny SA works great from them. Edit: Non USB model arrived today and updated just fine. No soldering, no jumpers it just worked including the screen, and firmware updated fine

I have bought over 10 simplex mmdvm modems from Aursinc and all are working flawlessly and were easy to set up. The Duplex modem I recently purchased gave me a lot of grief. Aursinc emailed me detailed instructions on setting up on both Pi-Star & WPSD to no avail. When I contacted them again they were quick to offer a replacement. This is the first time I have had to contact them and are pleasantly surprised at how well they respond to customers. I expect to be purchasing additional duplex units and will definitely buy this brand.

Call me impressed. Had a Pi4 kicking around and wanted to add a digital hotspot into the mix. Loaded the WPSD image and had the hotspot configured and running within the hour. Works just as expected. Took me longer to read the band plan and figure out the frequencies I needed to use than get this thing up and running.

This hat was easy to assemble and program with pi-star. It is running on a Raspberry Pi 3B.

Works well when the firmware is updated however if you follow the instructions provided for the jumper position, it will not work. The jumper needs to be from bottom center to bottom right, not bottom left as shown in the instructions. Boot 0 center to Boot 0 - (not +).