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。
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(); });