USB at the device.
An ESP32 bridge plugs into the GHL device’s USB port and connects to your local Wi-Fi.
In development · Beta interest
GHL firmware updates.
Without the cable run.
Sentinel Flash connects an ESP32 to your GHL device’s USB port, so you can update device firmware wirelessly through a simple browser interface.
I’m interested in beta testing →An independent project by TelegrahamTested.
The idea
Less setup between you and an update.
A browser you already use.
Access the bridge from your phone or computer, with a straightforward interface to guide the update.
A clearer path through.
The project brings firmware selection, backup, update progress, and verification into one workflow. Recovery tools are part of the wider project.
Help shape Sentinel Flash
Want to try the beta?
Tell me which GHL devices you use. I’ll get in touch when there’s a suitable opportunity to test.
Signup registers your interest. It does not guarantee an invitation or immediate access.
Compatibility is being validated device by device. The project is in development; this page is not a firmware download or a claim that all GHL products are supported.
A few things to know.
Is this the GHL Wi-Fi module firmware updater?
Sentinel Flash focuses on updating the GHL device’s firmware through its USB connection. Device firmware and the device’s Wi-Fi module firmware are separate.
What about recovery after an interrupted update?
Recovery tooling is part of Sentinel Flash’s scope. It supports the main goal of straightforward wireless firmware updates; recovery features and supported recovery states are still being developed.
Is this an official GHL product?
No. Sentinel Flash is an independent TelegrahamTested project and is not affiliated with or endorsed by GHL. GHL product names belong to their respective owners.
How will my signup information be used?
Your name, email, and device details are stored privately for beta coordination. They are not displayed publicly. Contact contact@telegrahamtested.com to request removal.