---
product_id: 374048630
title: "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 Raspberry Pi, Pi Zero (with OLED)"
brand: "aursinc"
price: "€ 130.57"
currency: EUR
in_stock: true
reviews_count: 5
category: "Aursinc"
url: https://www.desertcart.hr/products/374048630-mmdvm-duplex-hotspot-module-dual-hat-v1-5-2-0
store_origin: HR
region: Croatia
---

# 32-bit ARM processor power Dual ADF7021 for true duplex operation 0.96 OLED display for real-time status 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 Raspberry Pi, Pi Zero (with OLED)

**Brand:** aursinc
**Price:** € 130.57
**Availability:** ✅ In Stock

## Summary

> 📡 Elevate your digital radio game with duplex power and Pi-perfect precision!

## Quick Answers

- **What is this?** 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 Raspberry Pi, Pi Zero (with OLED) by aursinc
- **How much does it cost?** € 130.57 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/374048630-mmdvm-duplex-hotspot-module-dual-hat-v1-5-2-0)

## Best For

- aursinc enthusiasts

## Why This Product

- Trusted aursinc brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Real-Time OLED Feedback:** Stay informed with onboard OLED display and LED indicators showing Tx, Rx, PTT, and mode status.
- • **Crystal-Clear Frequency Range:** Operate confidently across UHF 433-900MHz and VHF 144-146MHz amateur bands.
- • **Future-Proof Firmware Updates:** Easily upgrade firmware via Pi-Star terminal commands—no jumper fiddling required.
- • **Seamless Dual Time Slot Mastery:** Unlock simultaneous monitoring of two DMR talkgroups for ultimate multitasking.
- • **Plug & Play Raspberry Pi Compatibility:** Effortlessly integrates with Pi 1 through Pi 4 and Pi Zero models—no hardware headaches.

## Overview

The AURSINC MMDVM Duplex Hotspot Module Dual Hat V1.5.2 is a high-performance digital radio hotspot designed for Raspberry Pi platforms. Featuring dual ADF7021 chips, it enables true duplex operation with two time slots on DMR, supporting multiple digital voice modes including DMR, P25, D-Star, and System Fusion. Its 32-bit ARM processor and 0.96-inch OLED display provide robust processing power and real-time status feedback. Compatible across a wide frequency range (UHF 433-900MHz, VHF 144-146MHz), it offers easy firmware upgrades and seamless integration, making it a top choice for amateur radio enthusiasts seeking advanced hotspot functionality.

## Description

DESCRIPTION Original cystal : Original ECS-TXO-3225-147.4-TR from USA Duplex variant of MMDVM_HS_Hat This PCB uses the MMDVM_HS . It has two ADF7021 onboard and allows for duplex operation with two time slots on DMR. Setting Tips: Modem select: STM32_HS_GPIO FREQUENCY: UHF 433-900MHz, VHF 144-220 MHz. NOTE: TX =0, RX=0To leave the screen on all the time In Pi-Star configuration, ensure you have "OLED Type 3" in the display type field at the top of the page, set Port to: modem. Also, in the Expert section, go to MMDVM host, and scroll down to the OLED section. Make sure LogoScreensaver is set to 1. This leaves the screen on all the time. Otherwise, it goes blank when idle Package List: 1x MMDVM duplex HotSPOT Module 2x Antenna 2x SMA socket

Review: Duplex means it’s meant to have an offset for TX and RX. Also one is TX only and the other is RX only. It will not listen to two modes at the same time or allow you to listen to one mode and TX at the same time, and it will not allow you to monitor two D-Star reflectors at the same time. It will allow a more natural “repeater” like operation, it will allow you to have both time slots in DMR (can monitor two different talkgroups at the same time. I’m happy with it overall however if I were to read/watch a decent review of it and knew what it can’t do (as I stated above) I probably wouldn’t have purchased it. I would really prefer (I’m probably wishing here and it’s probably not possible period) to have a dual receive mode where I can listen to 1 DMR talk group and 1 D-Star reflector at the same time…but it can’t. Would also be nice if it could act as a (cheap) actual repeater for public use. But it’s meant for digital mode personal hotspot use. Also, I should’ve paid the couple bucks more for the one with the attached screen. The nice thing as I stated above is now I have both DMR time slots, and it acts just like a repeater with a +5Mhz split “just like a real repeater”. Also, it runs just fine on a PiZero. If you bought a ZUMSpot or a cheapie Chinese copy, you can swap hats and make a few simple changes and be right back up again in less than 10mins. You will need to add programming to your DMR radio. I had to change my channels to use a +5Mhz split, and to get both time slots I also added another “Zone” and copied all the channels that I was already set for, however one zone is time slot 1, and the other is time slot 2. Same channels, same RX & TX frequencies, only needed to change the time slot settings. But now I can have both bands on my AT-D878UV going, with band one zone using time slot 1 and band two using the zone for time slot 2. I’m sure there are other ways to accomplish the same thing, just sharing what I did.
Review: Works very we with DVM Host in the 900 Ham bands. Very nice quality as well.

## Features

- [Extensive Compatibility] Supports DMR, P-25, D-Star and System Fusion. HIGH PERFORMACE: 32-bit ARM processor, up to 10mW RF power, fully tested every piece. Compatible with the Raspberry Pi, including the Pi 1, 2/2b, 3/3b/3b+, 4/4b, Pi Zero, Pi Zero 2W
- [Easy to Assemble] The firmware is pre-loaded and is easily upgraded via software. Onboard LEDs showing status (Tx, Rx, PTT, Mode). Pi-star control Mode selection: DUPLEX Mode/SIMPLE Mode
- [Frequency Range] UHF 433-900MHz, VHF144-146MHz. (144-148, 219-225, 420-475 Main band, 842-950) It's best to work on the amateur band: 430-440 MHz. NOTE: TX=0, RX=0. To leave the screen on all the time In Pi-Star configuration, ensure you have "OLED Type 3" in the display type field at the top of the page, set Port to: modem
- [Setting] Modify the modem type (any model ending in GPIO can be supported). Radio/Modem Type: STM32-DVM/MMDVM_HS-Raspberry pi Hat(GPIO). In the Expert section, go to MMDVM host, and scroll down to the OLED section. Make sure LogoScreensaver is set to "1", this leaves the screen on all the time. Otherwise, it goes blank when idle
- [Update New FW] (pi-star / expert / ssh access / user: pi-star pass: raspberry) You can directly run upgrade commands without the need to set jumpers (run in the Pi star terminal): sudo pistar-mmdvmhshatflash hs_dual_hat (if this command doesn't work, please try this command: mmdvm.club/index.php/wpsd .html)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0878WF7HW |
| Are Batteries Included | No |
| Brand | AURSINC |
| Color | With OLED |
| Customer Reviews | 4.4 4.4 out of 5 stars (163) |
| Date First Available | 19 May 2020 |
| Item Weight | 70 g |
| Item model number | 20200 |
| Manufacturer | AURSINC |
| Memory Technology | LPDDR2 or LPDDR3 |
| Number of Ethernet Ports | 2 |
| Operating System | Linux |
| Package Dimensions | 9.4 x 9.3 x 3.2 cm; 70 g |
| Processor Brand | ARM |
| Processor Count | 1 |
| Processor Type | ARMv7 |
| Series | AURSINC MMDVM Duplex Hotspot Module Dual Hat V1.5.2 |
| Wireless Type | Bluetooth |

## Product Details

- **Brand:** AURSINC
- **CPU model:** ARMv7
- **Connectivity technology:** GPIO
- **Included components:** 1x MMDVM duplex HotSPOT Module, 2x Antenna, 2x SMA socket
- **Model name:** AURSINC MMDVM Duplex Hotspot Module Dual Hat V1.5.2

## Images

![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 Raspberry Pi, Pi Zero (with OLED) - Image 1](https://m.media-amazon.com/images/I/61YijyH4-gL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by R***. on 28 October 2022*

Duplex means it’s meant to have an offset for TX and RX. Also one is TX only and the other is RX only. It will not listen to two modes at the same time or allow you to listen to one mode and TX at the same time, and it will not allow you to monitor two D-Star reflectors at the same time. It will allow a more natural “repeater” like operation, it will allow you to have both time slots in DMR (can monitor two different talkgroups at the same time. I’m happy with it overall however if I were to read/watch a decent review of it and knew what it can’t do (as I stated above) I probably wouldn’t have purchased it. I would really prefer (I’m probably wishing here and it’s probably not possible period) to have a dual receive mode where I can listen to 1 DMR talk group and 1 D-Star reflector at the same time…but it can’t. Would also be nice if it could act as a (cheap) actual repeater for public use. But it’s meant for digital mode personal hotspot use. Also, I should’ve paid the couple bucks more for the one with the attached screen. The nice thing as I stated above is now I have both DMR time slots, and it acts just like a repeater with a +5Mhz split “just like a real repeater”. Also, it runs just fine on a PiZero. If you bought a ZUMSpot or a cheapie Chinese copy, you can swap hats and make a few simple changes and be right back up again in less than 10mins. You will need to add programming to your DMR radio. I had to change my channels to use a +5Mhz split, and to get both time slots I also added another “Zone” and copied all the channels that I was already set for, however one zone is time slot 1, and the other is time slot 2. Same channels, same RX & TX frequencies, only needed to change the time slot settings. But now I can have both bands on my AT-D878UV going, with band one zone using time slot 1 and band two using the zone for time slot 2. I’m sure there are other ways to accomplish the same thing, just sharing what I did.

### ⭐⭐⭐⭐⭐ Review
*by W***S on 15 May 2024*

Works very we with DVM Host in the 900 Ham bands. Very nice quality as well.

### ⭐⭐⭐⭐⭐ Review
*by S***. on 3 December 2025*

Great MMDVM Hotspot! It just keeps on working day after day. Works great with all digital modes I've tried! DSTAR, YSF, P25, DMR, & NXDN! I use this single Hotspot with multiple protocol radios simultaneously to monitor activity. One cannot use more than radio at a time, however, but that is not a fault of the MMDVM. for that use case, it would require a dedicated MMDVM for each protocol.

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-04-28*