I’m trying to use tzapu WifiManager which is working perfectly except on reconnects I get an “Invalid Auth Token” error. So for instance if the internet goes down and comes back up it will try and reconnect but gives the Auth error. If I do a full restart it will automatically connect like normal.
char blynk_token[34] = "KhlDzab8Vk4HeeYCLe2WpFXvQbRcZcZn"; // Not Real Token
char name[9] ;
bool shouldSaveConfig = false;
void saveConfigCallback () {
Serial.println("Should save config");
shouldSaveConfig = true;
}
void setup(){
Serial.begin(74880);
snprintf(name, 15, "Dimmer_%s", blynk_token);
//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");
}
//end read
// The extra parameters to be configured
// id/name placeholder/prompt default length
WiFiManagerParameter custom_blynk_token("blynk", "blynk token", blynk_token, 34);
//WiFiManager
//Local intialization.
WiFiManager wifiManager;
//set config save notify callback
wifiManager.setSaveConfigCallback(saveConfigCallback);
//add all your parameters here
wifiManager.addParameter(&custom_blynk_token);
//set minimum quality of signal so it ignores AP's under that quality
//defaults to 8%
wifiManager.setMinimumSignalQuality();
//fetches ssid and pass and tries to connect
//if it does not connect it starts an access point with the specified name
//and goes into a blocking loop awaiting configuration
if (!wifiManager.autoConnect(name, "password")) {
Serial.println("failed to connect and hit timeout");
delay(3000);
//reset and try again, or maybe put it to deep sleep
ESP.reset();
delay(5000);
}
//if you get here you have connected to the WiFi
Serial.println("connected...");
//read updated parameters
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();
//end save
}