Step 1 of 3

Hold Top or Bottom

Keep the badge display upright and remember which button you use. Tap Start watching, leave Chrome's chooser open, then hold either the Top or Bottom button for about 2.2 seconds. Release when the dot appears and select WCH ISP. If no dot appears, repeat with the other button.

FrogAlert immediately runs the read-only equivalent of wchisp info to keep the ISP session active. It then asks which button you held; that single click immediately erases, flashes, and verifies the matching image.

Checking WebUSB…

Release pair: Loading the latest published pair…
Top-button image: Not verified yet
Bottom-button image: Not verified yet
Build provenance: Not verified yet
Hardware status: Not verified yet

Preparing and hash-checking both button-matched images…

Preparing firmware before opening the WCH ISP chooser…

Badge not detected?

If compatible firmware is running, tap Start watching, keep Chrome's chooser open, then hold either button for about 2.2 seconds. Release when one dot lights near the middle and select WCH ISP promptly.

260404: KEY2 is farther from USB. 250901: KEY2 is nearest USB.

Original or unknown firmware may require qualified C3 bench recovery. Do not disturb the soldered battery.

Capability or fact	Current value	How it is known
USB target	Not connected	Detected WCH Identify response
Chip / family bytes	—	Detected must be `0x82 / 0x16`
Bootloader version	—	Detected read-only config response
UID integrity	—	Detected validated locally; raw UID is not displayed
BadgeMagic `FEE0/FEE1`	Not probed	Detected only while application firmware is running
Running Bluetooth name	Not probed	Detected untrusted display name, not an identity proof
Running GATT profile	Not probed	Detected legacy FEE0/FEE1 only; other profiles are not queried
Self-reported firmware revision	Not probed	Detected if exposed optional Device Information value; not independently verified
Self-reported manufacturer	Not probed	Detected if exposed optional Device Information text
Self-reported model	Not probed	Detected if exposed optional Device Information text
Exact installed firmware or version	Current firmware is unknown unless it self-reports a version	Unavailable the bootloader cannot report it; optional GATT text is not proof of flash contents
Authorized USB device	None	Detected browser permission for the captured device only
USB vendor / product ID	—	Detected descriptor, not sufficient target proof
USB product	—	Detected if exposed untrusted descriptor text
USB manufacturer	—	Detected if exposed untrusted descriptor text
USB device version	—	Detected if exposed USB descriptor, not installed firmware
Configuration state	Not read	Detected summarized without guessing what differing bits mean
Physical PCB marking	Not recorded	User confirmed read from the opened board
Board revision and display wiring	PCB revision cannot be detected remotely	Unavailable requires an opened-board record and physical comparison
Display geometry	Not confirmed	User confirmed exactly 11 rows × 44 columns
Firmware hardware profile	Not selected	User selected bound to the chosen image
OEM backup	Impossible through this device	Unavailable read protection prevents a dump

Hold Top or Bottom

Hold Top or Bottom

Which button entered flashing mode?

Flash and verify

Session log

Badge updated

Update your badge.

Check WebUSB before opening the badge

Choose how the badge is connected

Running badge via Bluetooth

WCH ISP bootloader via USB

Step 1 of 5: Confirm compatible firmware

KEY2 entry is provided by compatible firmware.

Routine sequence after compatible firmware is installed

Match the BIN to the opened board

FrogAlert release

Hardware-verified lab build

Open BadgeMagic v0.1

Developer tools

Choose nearby-device alerts

Custom targets

These checks cannot be automated.

Reset config, erase, program, verify.

Session log

Use wchisp when WebUSB is unavailable