​https://www.wandianshenme.com/play/arduino-ota-arduino-ide-ota-upgrade-esp8266-application/​

我这里详细地说下这里包含了啥信息!

由下面可得,不同的8266模块,其外部falsh大小决定了编译时候的user.bin路径,所以大家在此OTA升级,必须要摸清楚你买的模块是哪个falsh大小的,注意1M = 8Mbit!!!安信可的 32Mbit 其实就是 4M的falsh,类似 25Q32这样的存储芯片。


ESP8266远程OTA升级_存储芯片

ESP8266远程OTA升级_存储芯片_02

ESP8266远程OTA升级_javascript_03



server.on("/", HTTP_GET, []() {       server.sendHeader("Connection", "close");       server.send(200, "text/html", serverIndex);     });     server.on("/update", HTTP_POST, []() {       server.sendHeader("Connection", "close");       server.send(200, "text/plain", (Update.hasError()) ? "FAIL" : "OK");       ESP.restart();     }, []() {       HTTPUpload& upload = server.upload();       if (upload.status == UPLOAD_FILE_START) {         Serial.setDebugOutput(true);         WiFiUDP::stopAll();         Serial.printf("Update: %s\n", upload.filename.c_str());         uint32_t maxSketchSpace = (ESP.getFreeSketchSpace() - 0x1000) & 0xFFFFF000;         if (!Update.begin(maxSketchSpace)) { //start with max available size           Update.printError(Serial);         }       } else if (upload.status == UPLOAD_FILE_WRITE) {         if (Update.write(upload.buf, upload.currentSize) != upload.currentSize) {           Update.printError(Serial);         }       } else if (upload.status == UPLOAD_FILE_END) {         if (Update.end(true)) { //true to set the size to the current progress           Serial.printf("Update Success: %u\nRebooting...\n", upload.totalSize);         } else {           Update.printError(Serial);         }         Serial.setDebugOutput(false);       }       yield();     });