Joined in 2023 
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There are 2 black pin connectors on the MMDVM and these just slip straight on the top of the Raspberry Pi, No soldering or anything required here. As part of programming your radio, if you are using CDM/commercial radios, make sure all your settings are set to FLAT AUDIO. Through proper coordination, given digital’s IP connectivity and features, Ham radio operators around the world can build fully connected systems, allowing remote parts to have access to RF communication. The coding to make the screen work seems pretty simple, however I have not looked at the code in the Pi-Star software that actually sends the information to the screen. Setup Pi-star: This video by W1MSG is an excellent video that goes over the initial setup of pi-star.
On the back of your Nextion screen you should see that the wires correspond to the labels on the back, if you look closely you will see that its labelled. There is a lot of experimentation and evolution going on with hotspots and DV networks, and it takes some effort to keep up. The size is perfect for mounting on a Raspberry Pi Zero W and I had one spare so it only took a few minutes to solder the header and the socket in place and I quickly had a unit ready to go. Use the same script, but have it run after the Pi is completely booted and add a line to restart the MMDVMHost service.Now we need to find an image, I found a really good facebook group that has some really helpful people on it, they also have loads of screens images that people have made for all different screen sizes. The hangtime is the amount of time the MMDVM will stay in that mode before allowing other digital mode signals a chance to reach the repeater. I wanted a hotspot for ages as I have had the use of Waynes Tytera MD380 DMR radio and more recently the amazing Ailunce HD1!
You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice. After which, the Pi-Star software will create it’s own wifi network and begin broadcasting to allow you to connect. Repeaters can receive and carry on two completely separate conversations with one on each time slot. Setting the RX offset is a bit more difficult because there isn’t really a way to test that within Pi-Star. After few connections in the Italian channel, I spoke with other OM and I’ve discovered that we have different value in the Pi-Star configuration and expert MMDVMHost.This hotspot is dual-band VHF-UHF, frequencies are limited on the amateur bands by the Pi-Star software and only one band (VHF or UHF) can be used at a time. I went to a fellow amateur radio operator’s house recently to test my board with his HP 8920A Service Monitor.
This week, I downloaded a Nextion Display layout created by PD0DIB and modified it to include a system control page and an information page. If your looking at the rx offset value dont worry as this will vary between devices as you fine tune the value across different radios. RF Hangtime is the amount of time the MMDVM waits after the end of an incoming RF (Radio Frequency) signal. I have mostly used Yaesu Fusion but using it through repeaters or more recently using our very own gateways! The Pi-Star Zero Hotspot from BI7JTA is a digital MMDVM access point: D-Star, DMR, C4FM, P25, POCSAG and NXDN, for the amateur radio bands VHF 144-148Mhz and UHF 430-450Mhz and with internet connection via WIFI and Bluetooth integrated.You do not need the screen, the hotspot can fully function without it if you don’t want to have one.
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