我實現傳輸的第二種方法是使用ESP-NOW。ESP-NOW是Esppresif開發的協議，它使多個ESP設備無需WiFi即可相互通信。
這給我們提供了一個比UDP選項更大的優勢，因為我們不需要WiFi網絡就可以使Walkie-Talkie正常工作。ESP-NOW的缺點是它具有250字節的小得多的數據包大小。這意味著我們需要每秒發送64次數據包。我們還具有與UDP相同的缺點-盡努力發送數據包，并且不能保證數據包將以什么順序到達。
但是，在我的測試中，它的表現還算不錯。運輸問題解決后，我們只需要掛接所有物品即可。我們有I2S輸入-它從麥克風讀取樣本并將它們傳遞到我們的運輸工具。一旦傳輸積累了足夠的數據以填充數據包，它將通過UDP或ESP-NOW發送數據。
另一方面，我們有相同的傳輸監聽數據包。每次接收到數據包時，它都會通過我們的I2S輸出將數據排隊等待播放。I2S輸出只是將采樣輸出到I2S放大器。
為了允許數據包花費更長的時間到達，我們在傳輸和I2S輸出之間有一個緩沖區。在開始播放樣本之前，我們花了少量時間-這給了我們一些空閑時間以允許數據包抖動。確實要付出一些音頻延遲的代價-考慮到所有因素，音頻在制作后大約半秒鐘就會播放。
總而言之，盡管該項目可行。質量并不令人驚奇，但是對于一個業余項目來說肯定足夠了。
與往常一樣，代碼全部在GitHub上。讓我知道您在評論中的想法。如果您有任何改進，請打開請求。
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