FEL key
A low-level Allwinner recovery control. Holding it during the correct startup procedure can place the board in FEL mode so an image or bootloader can be recovered over USB when normal booting is unavailable.
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Guided installerNode 651809Certified complete October 2026
ASL3, AllScan, Allmon3 & Supermon 8+on the Banana Pi M4 Berry
The experimental build is now a completed project: a full AllStarLink node and dashboard stack, documented and packaged as a reproducible guided installation.
PLATFORMBanana Pi M4 Berry · BPI-M4B V1.0
OPERATING SYSTEMArmbian 26.8.3 · Debian 13
RADIO INTERFACEAllScan UCI80
CLASSIFICATIONCompleted reference build · Guided installer v1.0
From working build to guided installer
A complete node—inside a case that shows its work.
The clear enclosure makes the active cooling, GPIO, network, and USB connections visible. The finished package makes the software path equally clear for the next operator.
The completed hardware
A clear view of the M4 Berry node—from active cooling to microSD storage.
These photographs document the exact BPI-M4B V1.0 board, enclosure, connector access, GPIO, active cooling, component layout, and underside used in the completed build.
The board positively identified
The silkscreen confirms the hardware used for this completed reference build: BPI-M4B V1.0.
Power, display, A/V, and network access
USB-C power/OTG, HDMI, the reset and user controls, the 3.5 mm A/V jack, and Gigabit Ethernet remain accessible through the open-sided enclosure.
GPIO and active cooling
The 40-pin GPIO header remains exposed while the clear fan and heatsinks provide visible, direct cooling.
The working board up close
A close side view shows the processor heatsink, supporting components, cooling assembly, and the clear standoff construction.
Wired Ethernet and four USB ports
A dedicated Gigabit Ethernet connection and four USB-A ports provide the practical I/O needed by the node and its UCI80 interface.
The complete component layout
From above, the active fan, two heatsinks, 40-pin GPIO header, USB-C power/OTG, HDMI, 3.5 mm A/V, Ethernet, and USB banks are easy to identify.
The underside and microSD storage
The underside view documents the board layout, soldered connections, quality-control mark, and accessible microSD slot.
Board layout & feature guide
Small board. Remarkably complete I/O.
The labeled layout reveals why the M4 Berry is such a flexible little platform: it combines ordinary desktop connections with recovery, debugging, expansion, storage, wireless, and user-control features normally hidden from a finished appliance.
Open the layout full sizeDebug UART
A 3.3-volt TTL serial console for seeing early boot messages and troubleshooting before networking or the normal display is working. It requires a compatible 3.3 V USB-to-TTL adapter—not an RS-232 cable.
PoE header
Pins for adding the proper optional Power-over-Ethernet hardware, letting one network cable carry data and power in a suitably equipped build. The header is not a direct 48 V input; use only the correct PoE module and wiring.
User switch
A programmable physical button that software can turn into a convenient action—such as an orderly shutdown, a service command, or another operator function. Its behavior depends on the installed configuration.
Also on board:
Allwinner H618 quad-core processing, 2 GB LPDDR4, 8 GB eMMC, a 40-pin expansion header, four USB-A ports, USB-C power/OTG, HDMI, a 3.5 mm A/V output, Gigabit Ethernet, Wi-Fi/Bluetooth with antenna connection, an IR receiver, status LEDs, and a microSD slot.
Project overview
Banana Pi M4 Berry
A completed Banana Pi M4 Berry node with ASL3, AllScan, Allmon3, Supermon 8+, a UCI80 radio interface, persistent networking, and a guided installer another operator can follow.
FULL DUPLEX
Transmit and receive at the same time.
The USB communications interface supports simultaneous transmit and receive operation, making this a true full-duplex AllStarLink node—not merely a conventional simplex hotspot.
What was proven
- Audio and PTT/COS fully tested
- Registration, linking, and Parrot testing passed
- AllScan, Allmon3, and Supermon 8+ operational
- Telemetry and favorites verified
- USB Wi-Fi and services persist after reboot
- Final guided installer and operator documentation completed
What the project includes
- START-HERE operator guidance
- Checkpointed guided installation scripts
- ASL3 and UCI80 configuration
- AllScan, Allmon3, and Supermon 8+ setup
- Networking and USB Wi-Fi persistence
- Verification, backup, and recovery guidance
Known limitations
Documented—not hidden.
- Traffic lights remain a separate optional project
- Use the package instructions and the correct node credentials for the target installation
- Keep web dashboards and management access on a trusted network or VPN
- Stable power and effective cooling are required
Complete release
Download the complete Banana Pi M4 Berry build package.
The website records the completed hardware and verified result. The download contains the guided installer, operator documentation, supporting files, and verification material needed to reproduce the node.
COMPLETE BUILD ZIP
Banana Pi M4 Berry Guided Installer
One download containing the complete operator package for building the verified ASL3 node and its three-dashboard web stack.
DownloadUse at your own risk. No warranty. Review the included START-HERE material before installation, follow the power-selection warning, and keep backups of your own configuration.