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ESP-WROOM-02相互通信・その2

https://blog.with2.net/link/?1965529

ESP-WROOM-02相互通信・その2

https://blog.with2.net/link/?1965529

前回の記事で一応成功した相互通信ですが、ラジコン端末に応用しようとすれば動作の種類だけポートを消費する、例えば車両のラジコンの場合であれば前後進、左右旋回、停止で5個のポートを消費するということなのでこれは実用にはならないなと思っていましたが、Facebookの公開グループである「ESP8266/ESP32環境向上委員会」のメンバーの方からの情報でうまく解決出来ました。

その方法とはTOUT端子を使うというものです。抵抗分圧とスイッチ動作で異なる電圧を必要数だけ作り出しTOUT端子に供給してやって、スケッチ上にて電圧判断をして動作を切り替えるという方法です。

ともかくやってみようということでタクトスイッチ三個と抵抗で三動作を切り替える回路を作ってみました。(回路図に間違いがりました。抵抗分圧回路1.8kは正しくはGNDに接続しています。下図が正解です。)

サーバー側の12,4,5ポートのLEDをクライアント側からの信号で点灯させようというものです。三種類の異なる電圧をスケッチ内のif文にて場合分けします。

2018.10.24訂正
手前のボードに三個のタクトスイッチが見えます、一番奥のボードがサーバー側で三個のLEDを配置します

確認試験の様子です。

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