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RemoteFM1 0.2.2

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@Quixotic7 Quixotic7 released this 28 Oct 02:21
· 91 commits to main since this release
v0.2.2
59a5b52

Install from the web installer: https://remotefm1.com/installer/ (Chrome or Edge), or with python3 tools/fm1_install.py remote-0.2.2.fwsc.

Released 2026-10-27, built with ./build.sh --release 0.2.2 (and --no-ble for the USB-only package). It replaces
0.2.1. Both packages install as FM-1_52000202.

Package sha256
remote-0.2.2.fwsc, USB + Bluetooth MIDI (the default) 489857fcc91104cd4edf19c7c975c0e6258d311931830838e9d9e6913bb3cb89
remote-usb-0.2.2.fwsc, USB only 4414f8f0b0936cb22c3fac91889e0df2cfa274d6322844edf13af5408841fc4d

What changed from 0.2.1

  • Bluetooth about 6x faster. The radio now uses the 2M PHY, 251-byte link-layer packets (Data Length
    Extension), an ATT MTU of 247 (244-byte writes), 16 receive buffers and a 1024-packet input queue, and asks for a
    7.5 ms connection interval first. JieLi's SDK left all of these off. Measured on an FM-1 with a Mac, 1 KB SysEx
    frames: about 6 KB/s in 0.2.1, about 35 KB/s now (38 KB/s with more in flight), nothing lost with 14 KB
    unacknowledged. macOS took 2M, 130-byte link packets and 7.5 ms. HELLO_R caps bit 8 says so.
  • Each screen change appears whole over Bluetooth. A new TILES flag, HOLD (caps bit 7): the FM-1 draws held
    frames into its off-screen copy and shows them with the frame that completes the change. Turning a knob that
    changes big text shows whole screens, never half old and half new. A change that stalls is shown by itself after
    1.5 s.
  • Hosts (this site's player and libremotefm1): over Bluetooth they pace frames for the link (30 KB/s with 0.2.2,
    5.5 KB/s with older units), send busy tiles with 4 colours first and the exact colours once the screen is still
    for a second, and send each change as one snapshot. USB and the vendor bulk interface are unchanged.
  • STATS_R carries what the Bluetooth link negotiated (interval, MTU, data length, PHY), for diagnosing a slow link.

Testing

On an FM-1 on 2026-10-27: installed over 0.2.1 and development builds; over USB-MIDI SysEx a session, every TILES
encoding, FRAME_ACK and LEDS (about 300 small frames a second round trip); over Bluetooth MIDI with a Mac, this
site's player running ChoralRoot: page changes and a turning PRESETS knob shown whole, no timeouts or lost frames.

Assets 4
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