Captures a connected Clawdmeter board's screen as a PNG over USB serial, with the bundled screenshot.py (the firmware's `screenshot` framebuffer dump, decoded). Use when asked to screenshot a board or the device, to check UI on real hardware, or to attach device output to a PR.
Installs into .claude/skills of the current project.
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---
name: capturing-device-screenshots
description: Captures a connected Clawdmeter board's screen as a PNG over USB serial, with the bundled screenshot.py (the firmware's `screenshot` framebuffer dump, decoded). Use when asked to screenshot a board or the device, to check UI on real hardware, or to attach device output to a PR.
---
# Capturing device screenshots
```bash
python3 ${CLAUDE_SKILL_DIR}/scripts/screenshot.py /path/out.png
```
Then Read the PNG. It's sized to the panel (480×480 on the AMOLED-2.16) and
takes about 2 s. Write it outside the repo unless it belongs in the PR.
- **Port**: the only `/dev/ttyACM*` or `/dev/cu.usbmodem*` attached; pass
`--port` when there are several. Close any `pio device monitor` first, it
holds the port. Opening the port doesn't reset the board.
- **pyserial missing**: run it with `~/.platformio/penv/bin/python`.
- **C6 boards can't be captured**: no PSRAM for the snapshot, so the script
stops with a message. Eyeball those on the panel, or check the same UI in
the simulator (`verifying-firmware-ui` skill).
- **A specific state**: force it over serial first (`clawd show`, `clawd
attention`, … via the `flashing-and-probing-boards` skill), then capture.
Device captures show what the firmware drew, not the panel's colours or
offsets; a photo is still the proof for those.
