[问答]

ESP8266 SPIFFS保存不正确是为何？

问答对人有帮助，内容完整，我也想知道答案 0 嘿，我在使用这个 Wemos D1 迷你 ESP8266 控制器的 SPIFFS 时遇到了一些问题。这是我的 Arduino 草图：代码：全选#include #include struct RGBLA { uint8_t R; uint8_t G; uint8_t B; uint8_t L; uint8_t A; }; void setup() { if (!SPIFFS.begin()) { Serial.println("error while mounting filesystem!"); } else { // put your setup code here, to run once: RGBLA returnedVars = readSPIFFS(); Serial.begin(115200); Serial.println(); Serial.println("Starting..."); Serial.println("readSPIFFS 1"); Serial.print("R: "); Serial.println(returnedVars.R); Serial.print("G: "); Serial.println(returnedVars.G); Serial.print("B: "); Serial.println(returnedVars.B); Serial.print("L: "); Serial.println(returnedVars.L); Serial.print("AmbientLight: "); Serial.println(returnedVars.A); Serial.println("=================================="); returnedVars = saveToSPIFFS(25,77, 107, 250, 155, false); Serial.println("saveToSPIFFS #1"); Serial.print("R: "); Serial.println(returnedVars.R); Serial.print("G: "); Serial.println(returnedVars.G); Serial.print("B: "); Serial.println(returnedVars.B); Serial.print("L: "); Serial.println(returnedVars.L); Serial.print("AmbientLight: "); Serial.println(returnedVars.A); Serial.println("=================================="); returnedVars = saveToSPIFFS(205,17, 68, 50, 15, true); Serial.println("saveToSPIFFS #2"); Serial.print("R: "); Serial.println(returnedVars.R); Serial.print("G: "); Serial.println(returnedVars.G); Serial.print("B: "); Serial.println(returnedVars.B); Serial.print("L: "); Serial.println(returnedVars.L); Serial.print("AmbientLight: "); Serial.println(returnedVars.A); returnedVars = readSPIFFS(); Serial.println("readSPIFFS 2"); Serial.print("R: "); Serial.println(returnedVars.R); Serial.print("G: "); Serial.println(returnedVars.G); Serial.print("B: "); Serial.println(returnedVars.B); Serial.print("L: "); Serial.println(returnedVars.L); Serial.print("AmbientLight: "); Serial.println(returnedVars.A); Serial.println(); Serial.println("END!"); } } void loop() { // put your main code here, to run repeatedly: } RGBLA saveToSPIFFS(uint8_t R, uint8_t G, uint8_t B, uint8_t L, uint8_t A, bool saveA) { File configFile = SPIFFS.open("/config.json", "w+"); if (configFile.size() > 3072) { Serial.println("Config file size is too large."); } else { Serial.print("Writing json to Config file..."); StaticJsonBuffer<200> jsonBuffer; JsonObject& json = jsonBuffer.createObject(); //Get the old value and save it RGBLA returnedVars = readSPIFFS(); Serial.println("Old Values?"); Serial.print("R: "); Serial.println(returnedVars.R); Serial.print("G: "); Serial.println(returnedVars.G); Serial.print("B: "); Serial.println(returnedVars.B); Serial.print("L: "); Serial.println(returnedVars.L); Serial.print("AmbientLight: "); Serial.println(returnedVars.A); if (saveA) { //Save Ambient Light data json["R"] = returnedVars.R; json["G"] = returnedVars.G; json["B"] = returnedVars.B; json["L"] = returnedVars.L; json["A"] = A; //Now save the new data returnedVars.A = A; } else { //Save RGBL data json["R"] = R; json["G"] = G; json["B"] = B; json["L"] = L; json["A"] = returnedVars.A; //Now save the new data returnedVars.R = R; returnedVars.G = G; returnedVars.B = B; returnedVars.L = L; } json.printTo(configFile); configFile.close(); //Read new saved values into struct //returnedVars = readSPIFFS(); return returnedVars; } } RGBLA readSPIFFS() { bool exist = SPIFFS.exists("/config.json"); if (exist) { Serial.println("YAY!"); } else { Serial.println("Boo!"); } File configFile = SPIFFS.open("/config.json", "r"); std::unique_ptr buf(new char[configFile.size()]); configFile.readBytes(buf.get(), configFile.size()); DynamicJsonBuffer jsonBuffer; JsonObject& json = jsonBuffer.parseObject(buf.get()); RGBLA returnedVars; String debugLogData; json.printTo(debugLogData); Serial.println("==============="); Serial.println(debugLogData); Serial.println("==============="); returnedVars.R = json["R"]; returnedVars.G = json["G"]; returnedVars.B = json["B"]; returnedVars.L = json["L"]; returnedVars.A = json["A"]; configFile.close(); return returnedVars; } 这是控制台输出：代码：全选Starting... readSPIFFS 1 R: 0 G: 0 B: 0 L: 0 AmbientLight: 25 ================================== Writing json to Config file...YAY! =============== {} =============== Old Values? R: 0 G: 0 B: 0 L: 0 AmbientLight: 0 saveToSPIFFS #1 R: 25 G: 77 B: 107 L: 250 AmbientLight: 0 ================================== Writing json to Config file...YAY! =============== {} =============== Old Values? R: 0 G: 0 B: 0 L: 0 AmbientLight: 0 saveToSPIFFS #2 R: 0 G: 0 B: 0 L: 0 AmbientLight: 15 YAY! =============== {"R":0,"G":0,"B":0,"L":0,"A":15} =============== readSPIFFS 2 R: 0 G: 0 B: 0 L: 0 AmbientLight: 25 0
2023-2-27 08:17:13　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × wang21cj 该类别下有 38 个回答。邀请回答 hgimtk 该类别下有 38 个回答。邀请回答新星之火12138 该类别下有 33 个回答。邀请回答 chm5 该类别下有 32 个回答。邀请回答 zyh34997 该类别下有 32 个回答。邀请回答就好国dd 该类别下有 32 个回答。邀请回答 zaichenxi 该类别下有 31 个回答。邀请回答 heks 该类别下有 31 个回答。邀请回答四川赵赵该类别下有 29 个回答。邀请回答 flowerddd 该类别下有 29 个回答。邀请回答 muwersddg 该类别下有 29 个回答。邀请回答 caosurround 该类别下有 28 个回答。邀请回答星星公交站该类别下有 28 个回答。邀请回答 vinww特烦恼该类别下有 28 个回答。邀请回答 lkjflksjfsa 该类别下有 27 个回答。邀请回答 h1654155143.8331 该类别下有 27 个回答。邀请回答 723662364d 该类别下有 27 个回答。邀请回答 overheat 该类别下有 27 个回答。邀请回答 gvjhvbc 该类别下有 27 个回答。邀请回答安德森大该类别下有 27 个回答。邀请回答举报李猛相关推荐 • Modbus TCP不正确的响应长度是怎么回事？ 441 • 为什么ESP8266精英版调试会产生指令接收不正确问题？ 1498 • 如何从arduino获取输入并使用ESP8266发送电报？ 141 • 使用ESP8266作为Web服务器，如何将网页上传到SPIFFS？ 282 • esp8266-12F如何处理html文件和Spiffs？ 215 • SPIFFS是否包含在ESP8266的1MB内存映射限制中？ 239 • ESP8266FS不工作的原因？如何解决？ 168 • 使用SPIFFS方法时，ESP崩溃并出现异常的原因？ 196 • ESP8266_RTOS_SDK编译错误的原因? 732 • ESP8266 WLAN访问被拒绝的原因？ 261