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ESP-WROOM-02 でWiFi通信

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

ESP-WROOM-02 でWiFi通信

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

ハマってしまったESP-WROOM02のその後多少の進展がありましたので備忘録を兼ねて掲載しておきます。

500mA出力の3.3Vレギュレータを追加して容量不足に対応出来るようにしました

Lチカまではなんなく進めましたが、その後他のスケッチを書き込んで実行してみましたが書き込みは完了しているはずなのですが動作しない状態でハマっていました。苦節三日というか下記のサイト情報にたどりついてなんとか解決しました。

https://www.mgo-tec.com/blog-entry-chip-info-esp-wroom-02-esp8266.html

ハマったポイントはフラッシュメモリサイズの設定を忘れていたというかそんなものがあることすら気づいていませんでした。ArduinoのIDEのツール欄にFlashSizeというのがありデフォルトでは512kになっていました、最大16Mまであったのでとりあえずこれを指定して再書き込みしたところ成功しました。

上記と同じ作者のサイトにスマホブラウザ経由で”Hello World”という文字を表示させるというスケッチがありましたので、これを自宅のルーターSSID,パスワードを設定してESP-WROOM02に書き込んで実行したところ無事スマホに”Hello World”が表示されました。

https://www.mgo-tec.com/blog-entry-ss-wroom-howto01.html

一歩前進というところです。先は長いなあ!?

ところで前回失敗したファームウエアの書き換えもこれで成功しそうな感じがありますが、ATコマンドに戻る必要性もなくなってしまいましたので、このまま前進します。

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