universal-silabs-flasher
Tool to flash firmware onto any Silicon Labs radio running EmberZNet, CPC multi-PAN, or just a bare Gecko Bootloader
Decision gist · record as of 2026-08-14
Yes, if you work with Silicon Labs radios and need reliable, validated firmware flashing. Low install friction, active maintenance, no known vulnerabilities, and a focused scope make it a solid choice for the specific task. GPL-3.0 copyleft is a consideration only if you plan to redistribute modified versions commercially. The 116-day recency and 174 GitHub stars suggest active use in the Home Assistant ecosystem.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.11 or later; device must be connected via serial port and support one of the bootloader reset methods (yellow, ihost, slzb07, rts_dtr, baudrate) or a predefined profile.
- Low friction: pure Python wheel with no compiled dependencies.
- Active maintenance (last commit 2026-04-20), modest but steady adoption (83277 monthly downloads, top 15000 tier).
License · maintenance · safety
GPL-3.0 (copyleft) — GPL-3.0 copyleft license: any derivative work or distribution must also be open-source under GPL-3.0. Suitable for internal tools and open-source projects; review required before commercial redistribution.
last release 2026-04-20 (116 days) · last repo commit 2026-04-20 · 174 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 83,277 downloads/mo, #14,084 on PyPI
Alternatives
Verify before relying
pip install universal-silabs-flasher
universal-silabs-flasher --device /dev/ttyUSB0 flash --firmware image.gbl- Whether gpiod is always required at runtime or only for specific reset methods (e.g., GPIO-based resets).
- Compatibility matrix across Silicon Labs radio models and firmware versions.
- Whether IEEE address writes are reversible or truly permanent on all firmware versions.
What it is and what it does
Universal Silicon Labs Flasher is a command-line tool that automates firmware updates for Silicon Labs radios (EmberZNet, CPC multi-PAN, or bare Gecko Bootloader). It handles the entire process: detecting the device, entering bootloader mode via one of several reset methods, and transferring a GBL firmware image over XMODEM with built-in validation and checksum verification both before and after transfer.
The tool is designed for hardware integrators and developers working with Silicon Labs radio modules in IoT and mesh networking contexts. It supports multiple device types (Yellow, SkyConnect, Home Assistant Connect ZBT-2, Sonoff ZBDongle-E) through both explicit bootloader reset configuration and predefined device profiles. It can also write or verify IEEE addresses on devices running EmberZNet firmware.
Use it for
- Update firmware on Silicon Labs radio adapters used in Home Assistant or other IoT hubs without manual bootloader entry.
- Flash custom or vendor-specific EmberZNet, CPC, or Spinel firmware images onto development boards during prototyping.
- Automate firmware deployment across multiple identical radio devices in production or lab environments.
- Recover or reprogram IEEE addresses on EmberZNet devices as part of device provisioning workflows.
- Probe connected radios to identify their current application type and bootloader capabilities before flashing.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you work with Silicon Labs radios and need reliable, validated firmware flashing.
Low install friction, active maintenance, no known vulnerabilities, and a focused scope make it a solid choice for the specific task. GPL-3.0 copyleft is a consideration only if you plan to redistribute modified versions commercially. The 116-day recency and 174 GitHub stars suggest active use in the Home Assistant ecosystem.
Install
universal-silabs-flasher on PyPI
Before you install
Low friction: pure Python wheel with no compiled dependencies. Active maintenance (last commit 2026-04-20), modest but steady adoption (83277 monthly downloads, top 15000 tier). Requires Python 3.11+.
Requires Python 3.11 or later; device must be connected via serial port and support one of the bootloader reset methods (yellow, ihost, slzb07, rts_dtr, baudrate) or a predefined profile.
License in practice
GPL-3.0 copyleft license: any derivative work or distribution must also be open-source under GPL-3.0. Suitable for internal tools and open-source projects; review required before commercial redistribution.
Quickstart
pip install universal-silabs-flasher
universal-silabs-flasher --device /dev/ttyUSB0 flash --firmware image.gblVerify before relying
- Whether gpiod is always required at runtime or only for specific reset methods (e.g., GPIO-based resets).
- Compatibility matrix across Silicon Labs radio models and firmware versions.
- Whether IEEE address writes are reversible or truly permanent on all firmware versions.
Package facts
| License | GPL-3.0 copyleft |
| Python support | Supports the current Python release >=3.11 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 8 packagesaiohttptqdmzigpycrcbellowsgpiodcoloredlogstyping_extensions |
| Maintenance | Actively maintained 116 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 83,277 / month, #14,084 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
Evidence: universal_silabs_flasher-1.1.0-py3-none-any.whl
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