Build Your Own Compact Allstar Node with SHARI PiZero
In today’s increasingly connected amateur radio landscape, digital linking is no longer a novelty—it’s a vital part of modern ham operations. The SHARI PiZero (SA818 Ham Allstar Radio Interface for PiZero) is a purpose-built solution designed for hams who want a compact, efficient, and reliable Allstar node that they can build themselves. Whether you’re an experienced builder or new to DIY radio kits, the SHARI PiZero offers an excellent balance of performance, flexibility, and value.
What is SHARI PiZero?
The SHARI PiZero is a custom-designed hardware kit that transforms a Raspberry Pi Zero 2W into a fully functioning Allstar Node. Designed for use in the amateur radio service, the kit incorporates a NiceRF SA818 embedded radio module, available in UHF (420–450 MHz) or VHF (144–148 MHz) versions. It provides 250–500 milliwatts of RF power—ideal for hotspot use or local repeater access.
The kit includes a dedicated USB audio interface (CM108B), a lowpass filter to meet FCC Part 97 spurious emissions requirements, and a three-port microUSB hub to support accessories like USB-to-Ethernet adapters or external keyboards. This makes setup and configuration via wired Ethernet not only possible but preferred, especially for first-time builders working with the HamVOIP Allstar image.
Key Features at a Glance
- Embedded NiceRF SA818S module in UHF or VHF band options
- CM108B USB audio chip for high-quality audio handling
- Lowpass LTCC filter to ensure spectral cleanliness
- Integrated 3-port USB hub for peripherals and Ethernet adapters
- Surface mount components pre-installed — minimal soldering required
- Compact and rugged Hammond aluminum enclosure
- Optional pre-soldering and full assembly services
Construction and Setup: Designed with Builders in Mind
SHARI PiZero is designed as a partially pre-assembled kit. The PCB arrives with all small surface-mount components factory-installed. As the builder, you’ll install only a few through-hole components: the SA818 radio module, SMA RF connector, and headers for the Raspberry Pi. All necessary cables are included, and detailed instructions are provided via request.
One of the advantages of the SHARI PiZero design is its thoughtful inclusion of hardware for a clean build—such as 3D-printed end caps and optional blank end plates for custom modifications.
The Raspberry Pi Zero 2W (not included in the base kit) plugs directly into the SHARI motherboard using the GPIO header and a custom USB cable. Since the PiZero doesn’t have an Ethernet port, the onboard USB hub lets you plug in a microUSB-to-Ethernet adapter, ensuring a stable connection for image configuration and updates.
Kit or Fully Assembled: Your Choice
SHARI PiZero is available in two models:
- PiZeroU (UHF 420–450 MHz)
- PiZeroV (VHF 144–148 MHz)
You can purchase the kit for just $100, which includes all components except the Raspberry Pi Zero 2W, power supply, and microSD card. If you prefer, for an additional $5, the SA818 module can be pre-soldered for you.
Don’t have the time or tools to assemble the kit yourself? A fully assembled and tested SHARI PiZero is available for $205, which includes the Raspberry Pi Zero 2W and a power supply. For wired networking, an optional microUSB-to-Ethernet adapter can be added for $10—tested and guaranteed to work with the HamVOIP Allstar distribution.
Shipping to U.S. addresses is a flat $9 via USPS Priority Mail.
Community and Support
Builders and users of SHARI can access community-based support through the SHARI Groups.io group, which serves as the primary hub for troubleshooting, build questions, and ideas. For software-related support (e.g., configuring HamVOIP or ASL), users are encouraged to consult the respective project sites.
Get Started
Whether you’re setting up a remote Allstar node at your vacation cabin, building an RF link for your club repeater, or just want a portable digital access point, SHARI PiZero is a reliable and customizable solution.
To order, download the SHARI PiZero Order Form and email it to kits4hams@gmail.com. You’ll be added to the waitlist and notified when your kit is ready. Payment is accepted via PayPal.
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