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20191030 M5StickV+をシールドルームで試してみた話 #M5Stack
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Kazuhiro Sasao
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M5Stackユーザーミーティング vol.6 発表資料です。
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20191030 M5StickV+をシールドルームで試してみた話 #M5Stack
1.
M5StickV+をシールドルーム で試してみた話 ミクミンP @ksasao M5Stackユーザーミーティング vol.6 2019/10/30
2.
• 試作品で技適も通っていないので シールドルームで 技適マーク
3.
シールドルーム https://www.tele.soumu.go.jp/resource/j/material/dwn/kouzi3.pdf
4.
M5StickV+とは • M5StickV に
WiFi と マイク を追加したもの • ケースは M5StickV と同一 (βテスター版の場合) • M5StickV のプログラムがそのまま動く • WiFi へのアクセスは ATコマンド(UART経由)で行う • https://maixpy.sipeed.com/zh/libs/machine/network.html にAPIの記載あり(中国語のみ) • マイクは I2S • ディープラーニングに利用するには一工夫必要
5.
デフォルトアプリの動作 • 近くのアクセスポイント一覧を表示する • MACアドレス,
RSSI, SSID
6.
M5StickV+の WiFi機能 https://twitter.com/SipeedIO/status/1141662906225811456 より •
Sipeed M1w モジュール(旧)に内蔵されている esp8285 と同等の 使い方で動作 • https://maixpy.sipeed.com/zh/libs/machine/network.html にAPIの記載あり(中国語のみ) • M1w では SPI 接続経由でビデオが送れるようになった模様 • ただし API は ESP32 のみ更新されているので 現行モジュールも変わって いるかも? • M5StickV+ も ESP32に?
7.
esp8285との通信 https://github.com/sipeed/MaixPy_scripts/tree/master/network • 初期は 115.2
kbps で接続 • そのままでは画像の読み込みなどは遅い • その後 ATコマンドで 921.6 kbps に変更
8.
通信API https://github.com/sipeed/MaixPy_scripts/tree/master/network • 基本的にはソケット通信のAPIのみ • HTTP(S)
はサンプル実装あり HTTPで画像をダウンロードして表示 した例
9.
マイクも動く! https://gist.github.com/ksasao/ 7e8c28d24123ed02960eb085a209d835 • I2Sデバイスとして素直な挙動
10.
FFTも動く • 音声データをフーリエ変換 • KPU
(ディープラーニング用プロセッサ)の Python API では画像のみを受け取るため、 一旦画像に変換する必要がある • 音声認識は(すぐには)ちょっと難しいかも
11.
M5StickVとの互換性 • 現行の M5StickV
のコードは M5StickV+ でも動作 • 拙作 Brownie でも動作を確認 • ファームウェアも共通とのこと
12.
まとめ
13.
参考リンク • M5Stack Official
Updates • 最新のファームウェアのアナウンスなど • http://forum.m5stack.com/category/34/official-updates • Telegram Sipeed.io • かなり活発 (Sipeed 関連製品全般) • https://t.me/sipeed ミクミンP @ksasao
14.
実機で画像学習→処理実行のデモ •Mobilenet を特徴抽出器として 利用して k近傍法で判定 •懇親会にて
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