Souliya999 (Souliya) August 13, 2020, 8:48am #1
#define BLYNK_PRINT Serial
#include <FS.h>
#include <DNSServer.h>
#include <WiFiManager.h>
#include <ESP8266WebServer.h>
#include <BlynkSimpleEsp8266.h>
#include <ArduinoJson.h>
#define SET_PIN 0
char blynk_token[40] = "";
bool shouldSaveConfig = false;
void saveConfigCallback () {
Serial.println("Should save config");
shouldSaveConfig = true;
}
void setup() {
Serial.begin(115200);
Serial.println();
pinMode(SET_PIN, INPUT_PULLUP);
delay(3000);
//read configuration from FS json
Serial.println("mounting FS...");
if (SPIFFS.begin()) {
Serial.println("mounted file system");
if (SPIFFS.exists("/config.json")) {
//file exists, reading and loading
Serial.println("reading config file");
File configFile = SPIFFS.open("/config.json", "r");
if (configFile) {
Serial.println("opened config file");
size_t size = configFile.size();
// Allocate a buffer to store contents of the file.
std::unique_ptr<char[]> buf(new char[size]);
configFile.readBytes(buf.get(), size);
DynamicJsonBuffer jsonBuffer;
JsonObject& json = jsonBuffer.parseObject(buf.get());
json.printTo(Serial);
if (json.success()) {
Serial.println("\nparsed json");
strcpy(blynk_token, json["blynk_token"]);
} else {
Serial.println("failed to load json config");
}
configFile.close();
}
}
} else {
Serial.println("failed to mount FS");
}
WiFiManagerParameter custom_blynk_token("blynk", "blynk token", blynk_token, 32);
WiFiManager wifiManager;
wifiManager.setSaveConfigCallback(saveConfigCallback);
wifiManager.addParameter(&custom_blynk_token);
if (digitalRead(SET_PIN) == LOW) {
wifiManager.resetSettings();
}
if (!wifiManager.autoConnect("Kitchenroom")) {
Serial.println("failed to connect and hit timeout");
delay(3000);
ESP.reset();
delay(5000);
}
Serial.println("wifi connected");
strcpy(blynk_token, custom_blynk_token.getValue());
//save the custom parameters to FS
if (shouldSaveConfig) {
Serial.println("saving config");
DynamicJsonBuffer jsonBuffer;
JsonObject& json = jsonBuffer.createObject();
json["blynk_token"] = blynk_token;
File configFile = SPIFFS.open("/config.json", "w");
if (!configFile) {
Serial.println("failed to open config file for writing");
}
json.printTo(Serial);
json.printTo(configFile);
configFile.close();
}
Serial.println();
Serial.print("local ip : ");
Serial.println(WiFi.localIP());
Serial.print("Blynk Token : ");
Serial.println(blynk_token);
Blynk.config(blynk_token);
}
void loop() {
Blynk.run();
}
