card-widget
Installation
SKILL.md
card-widget — drive the M5Paper 副屏
The card is a 540 × 960 e-ink panel sitting next to the user's monitor. You push 1-4 widgets and the daemon renders a single frame; transfer time depends on the transport.
Transport & latency (v0.8)
The daemon auto-picks Wi-Fi > USB > BLE at startup. Each path has different per-push characteristics — be aware:
| Transport | Single-widget update | Full frame | Power use |
|---|---|---|---|
| Wi-Fi (HTTP) | ~0.2 s | ~2 s | high while connected |
| USB serial @ 115200 | ~1 s region / ~32 s full | 32 s | n/a |
| BLE (small cmds only) | works for commands; frame data hangs | broken | low |