HI! im working in a project where i want to connect to a SSID wifi and put a Blynk Token so i can get notifications and so on.
The thing is that everything works fine the first time. If i reboot the Wemos D1 mini the blynk token fails to valid the auth and i get the error (Invalid auth token).
Maybe the FS is not saving the token or anything.
I paste my code below.
Anyone can help?
Thanks a lot in advance.
#include <ESP8266WiFi.h>
#include <DHT.h>
//needed for WiFiManager library
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h>
#include <ArduinoJson.h>
#define BLYNK_PRINT Serial
#include <BlynkSimpleEsp8266.h>
#define DHTTYPE DHT11
#define DHTPIN D4 // D2 fisical pin
DHT dht(DHTPIN, DHTTYPE);
const int sensorPin = A0;
//define your default values here, if there are different values in config.json, they are overwritten.
char mqtt_server[40] = "blynk-cloud.com";
char mqtt_port[6] = "8080";
char blynk_token[33] = "your-token";
//flag for saving data
bool shouldSaveConfig = false;
//callback notifying us of the need to save config
void saveConfigCallback () {
Serial.println("Should save config");
shouldSaveConfig = true;
}
void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
Serial.println();
Serial.println("********************");
Serial.println("DHT11");
dht.begin();
float h = dht.readHumidity();
float t = dht.readTemperature();
if (isnan(h) || isnan(t)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
float hic = dht.computeHeatIndex(t, h, false);
Serial.print("Humidity: ");
Serial.print(h);
Serial.println(" %\t");
Serial.print("Temperature: ");
Serial.print(t);
Serial.println(" *C ");
Serial.print("Heat index: ");
Serial.print(hic);
Serial.println(" *C ");
Serial.println("********************");
Serial.println("SENSOR HUMEDAD");
int sensorValue = analogRead(0);
// ver bien el mapeo, no funciona bien
// hay que mapear 1024 a 0 para tener el valor mas bajo
Serial.print("Moisture Sensor value: ");
sensorValue = map(sensorValue, 0, 1023, 1023, 0);
Serial.print(sensorValue);
Serial.println(" %\t");
Serial.println("Publishing to Blynk...");
Blynk.virtualWrite(V0, sensorValue);
Blynk.virtualWrite(V5, h);
Blynk.virtualWrite(V6, t);
Blynk.run();
Serial.println("********************");
Serial.println("BLYNK");
Serial.println("Waiting...");
delay(10000);
// WIFIMANAGER CONFIGS
//clean FS, for testing
SPIFFS.format();
//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(mqtt_server, json["mqtt_server"]);
strcpy(mqtt_port, json["mqtt_port"]);
strcpy(blynk_token, json["blynk_token"]);
} else {
Serial.println("failed to load json config");
}
}
}
} else {
Serial.println("failed to mount FS");
}
//end read
// The extra parameters to be configured (can be either global or just in the setup)
// After connecting, parameter.getValue() will get you the configured value
// id/name placeholder/prompt default length
WiFiManagerParameter custom_mqtt_server("server", "mqtt server", mqtt_server, 40);
WiFiManagerParameter custom_mqtt_port("port", "mqtt port", mqtt_port, 6);
WiFiManagerParameter custom_blynk_token("blynk", "blynk token", blynk_token, 33);
//WiFiManager
//Local intialization. Once its business is done, there is no need to keep it around
WiFiManager wifiManager;
//set config save notify callback
wifiManager.setSaveConfigCallback(saveConfigCallback);
//set static ip
//wifiManager.setSTAStaticIPConfig(IPAddress(10,0,1,99), IPAddress(10,0,1,1), IPAddress(255,255,255,0));
//add all your parameters here
wifiManager.addParameter(&custom_mqtt_server);
wifiManager.addParameter(&custom_mqtt_port);
wifiManager.addParameter(&custom_blynk_token);
//reset settings - for testing
//wifiManager.resetSettings();
//set minimu quality of signal so it ignores AP's under that quality, defaults to 8%
//wifiManager.setMinimumSignalQuality(30);
//sets timeout until configuration portal gets turned off
//useful to make it all retry or go to sleep
//in seconds
//wifiManager.setTimeout(120);
//fetches ssid and pass from eeprom and tries to connect
//if it does not connect it starts an access point with for auto generated name ESP + ChipID, no password
//and goes into a blocking loop awaiting configuration
if (!wifiManager.autoConnect()) {
Serial.println("FallĂ´ al conectar WiFi :( ");
delay(3000);
Serial.println("********************");
Serial.println("DEEP SLEEP");
Serial.println("Deep Sleep on...");
Serial.println("********************");
//reset and try again, or maybe put it to deep sleep
ESP.reset();
//ESP.deepSleep(60e6); // 60 segs
//ESP.deepSleep(1.08e+10); // 3 horas
//ESP.deepSleep(2.16e+10); // 6 horas
delay(100);
}
//if you get here you have connected to the WiFi
Serial.println("Wifi Conectado!: ");
//read updated parameters
strcpy(mqtt_server, custom_mqtt_server.getValue());
strcpy(mqtt_port, custom_mqtt_port.getValue());
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["mqtt_server"] = mqtt_server;
json["mqtt_port"] = mqtt_port;
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();
//end save
}
Serial.println("\nlocal ip:");
Serial.println(WiFi.localIP());
//still not connected to the Blynk server yet
//it will try to connect when it reaches first Blynk.run() or Blynk.connect() call
Blynk.config(custom_blynk_token.getValue(), custom_mqtt_server.getValue(), atoi(custom_mqtt_port.getValue()));
//to get the status of connection to Blynk Server use:
bool result = Blynk.connected();
}
void loop() {
Blynk.run();
}