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invatam

Andrei Bucur authored on 01/03/2018 13:51:12
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arduino/nodemcu/credentiale/credentiale.ino
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+#include <FS.h>
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+#include <ESP8266WiFi.h>          //https://github.com/esp8266/Arduino
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+#include <ArduinoJson.h>          //https://github.com/bblanchon/ArduinoJson
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+
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+//needed for library
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+#include <ESP8266WebServer.h>
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+#include <DNSServer.h>
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+
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+// Constants
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+const int TRIGGER_PIN = 0; // D3 on NodeMCU and WeMos.
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+
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+// Variables
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+const char* set_mqtt_user="exwrgq";
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+const char* set_mqtt_devid="2638";
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+
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+// Default configuration values
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+char mqtt_user[9]; //le va lua din FS
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+char mqtt_devid[5]; //le va lua din FS
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+
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+// Function Prototypes
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+bool readConfigFile();
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+bool writeConfigFile();
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+
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+// Setup function
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+void setup() {
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+  // Put your setup code here, to run once
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+  Serial.begin(115200);
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+  Serial.println("\n Starting");
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+
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+  // Initialize trigger pins
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+  pinMode(TRIGGER_PIN, INPUT_PULLUP);
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+
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+  // Mount the filesystem
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+  bool result = SPIFFS.begin();
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+  //Serial.println("SPIFFS opened: " + result);
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+
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+  if (readConfigFile()) {
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+    Serial.print("User:");
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+    Serial.println(mqtt_user);
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+    Serial.print("devid:");
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+    Serial.println(mqtt_devid);
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+  }
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+  //WiFi.printDiag(Serial); //Remove this line if you do not want to see WiFi password printed
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+
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+}
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+
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+// Loop function
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+
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+void loop() {
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+  // is configuration portal requested?
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+  if (digitalRead(TRIGGER_PIN) == LOW) {
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+     Serial.println("Configuration portal requested");
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+    writeConfigFile();
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+     Serial.println("writeconfigfile...done");
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+  }
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+}
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+
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+bool readConfigFile() {
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+  // this opens the config file in read-mode
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+  File f = SPIFFS.open("/config.json", "r");
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+
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+  if (!f) {
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+    Serial.println("Configuration file not found");
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+    return false;
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+  } else {
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+    // we could open the file
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+    size_t size = f.size();
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+    // Allocate a buffer to store contents of the file.
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+    std::unique_ptr<char[]> buf(new char[size]);
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+
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+    // Read and store file contents in buf
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+    f.readBytes(buf.get(), size);
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+    // Closing file
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+    f.close();
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+    // Using dynamic JSON buffer which is not the recommended memory model, but anyway
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+    // See https://github.com/bblanchon/ArduinoJson/wiki/Memory%20model
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+    DynamicJsonBuffer jsonBuffer;
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+    // Parse JSON string
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+    JsonObject& json = jsonBuffer.parseObject(buf.get());
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+    // Test if parsing succeeds.
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+    if (!json.success()) {
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+      Serial.println("JSON parseObject() failed");
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+      return false;
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+    }
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+    json.printTo(Serial);
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+    strcpy(mqtt_user, json["mqtt_user"]);
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+    strcpy(mqtt_devid, json["mqtt_devid"]);
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+  }
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+  return true;
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+}
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+
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+bool writeConfigFile() {
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+  Serial.println("Saving config file");
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+  DynamicJsonBuffer jsonBuffer;
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+  JsonObject& json = jsonBuffer.createObject();
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+
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+  // JSONify local configuration parameters
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+  json["mqtt_user"] = set_mqtt_user;
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+  json["mqtt_devid"] = set_mqtt_devid;
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+
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+  // Open file for writing
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+  File f = SPIFFS.open("/config.json", "w");
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+  if (!f) {
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+    Serial.println("Failed to open config file for writing");
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+    return false;
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+  }
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+
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+  json.prettyPrintTo(Serial);
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+  // Write data to file and close it
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+  json.printTo(f);
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+  f.close();
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+
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+  Serial.println("\nConfig file was successfully saved");
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+  return true;
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+}
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+