wifi not work when rfid is enabled

[studiosacchetti]

even a simple code like this can raise my problem

//connect to WiFi Serial.printf("Connecting to %s ", ssid); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(" CONNECTED");

with this config setting everything is ok

M5Dial.begin(cfg, false, false);

but if i enable rfid

M5Dial.begin(cfg, false, true);

m5dial can connect only once to my wifi network, i have a fritzbox router

any idea?

[Gitshaoxiang]

we have tested the RFID function with wifi, and also tested reconnecting multiple times, is problem. Hi, could you provide the full code you're using?

[studiosacchetti]

/**
   @file rfid.ino
   @author SeanKwok (shaoxiang@m5stack.com)
   @brief M5Dial RFID Test
   @version 0.2
   @date 2023-10-18

   @Hardwares: M5Dial
   @Platform Version: Arduino M5Stack Board Manager v2.0.7
   @Dependent Library:
   M5GFX: https://github.com/m5stack/M5GFX
   M5Unified: https://github.com/m5stack/M5Unified
*/

#include "M5Dial.h"
#include <HTTPClient.h>
#include <ArduinoJson.h>

//Your Domain name with URL path or IP address with path
const char* serverName = "http://arduinojson.org/example.json";

const char* ssid       = "XXXX";
const char* password   = "YYYY";
String sensorReadings;

void setup() {

  auto cfg = M5.config();
  cfg.serial_baudrate = 115200;
  M5Dial.begin(cfg, false, true);
  M5Dial.Display.setTextColor(GREEN);
  M5Dial.Display.setTextDatum(middle_center);
  M5Dial.Display.setTextFont(&fonts::Orbitron_Light_32);
  M5Dial.Display.setTextSize(1);

  M5Dial.Display.drawString("RFID Card", M5Dial.Display.width() / 2, M5Dial.Display.height() / 2);

  WiFi.begin(ssid, password);
  Serial.println("Connecting");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP());

  //contrrollare il server

}

void loop() {
  if (M5Dial.Rfid.PICC_IsNewCardPresent() && M5Dial.Rfid.PICC_ReadCardSerial()) {

    M5Dial.Display.clear();

    Serial.print(F("PICC type: "));
    uint8_t piccType = M5Dial.Rfid.PICC_GetType(M5Dial.Rfid.uid.sak);
    Serial.println(M5Dial.Rfid.PICC_GetTypeName(piccType));

    // Check is the PICC of Classic MIFARE type
    if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI &&  piccType != MFRC522::PICC_TYPE_MIFARE_1K && piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
      Serial.println(F("Your tag is not of type MIFARE Classic."));
      M5Dial.Display.drawString("not support", M5Dial.Display.width() / 2, M5Dial.Display.height() / 2);
      //return;
    }
    String uid = "";

    for (byte i = 0; i < M5Dial.Rfid.uid.size;  i++) {
      Serial.printf("%02X ", M5Dial.Rfid.uid.uidByte[i]);
      uid += String(M5Dial.Rfid.uid.uidByte[i], HEX);
    }

    sensorReadings = httpGETRequest(serverName);
    Serial.println(sensorReadings);
    // Parse response
    //const size_t capacity = JSON_OBJECT_SIZE(3) + JSON_ARRAY_SIZE(2) + 60;
    DynamicJsonDocument doc(2048);
    deserializeJson(doc, sensorReadings);

    /*if (error) {
      Serial.print(F("deserializeJson() failed: "));
      Serial.println(error.f_str());

      //client.stop();
      return;
    }*/
    Serial.println(doc["time"].as<long>());

    //JSONVar myObject = JSON.parse(sensorReadings);

    // JSON.typeof(jsonVar) can be used to get the type of the var
    /*if (JSON.typeof(myObject) == "undefined") {
      Serial.println("Parsing input failed!");
      return;
    }*/

    M5Dial.Speaker.tone(8000, 20);
    M5Dial.Display.drawString(M5Dial.Rfid.PICC_GetTypeName(piccType), M5Dial.Display.width() / 2, M5Dial.Display.height() / 2 - 30);
    M5Dial.Display.drawString("card id:", M5Dial.Display.width() / 2, M5Dial.Display.height() / 2);
    M5Dial.Display.drawString(uid, M5Dial.Display.width() / 2, M5Dial.Display.height() / 2 + 30);
    Serial.println();
  }
}

String httpGETRequest(const char* serverName) {
  HTTPClient http;

  // Your IP address with path or Domain name with URL path
  http.begin(serverName);

  // If you need Node-RED/server authentication, insert user and password below
  //http.setAuthorization("REPLACE_WITH_SERVER_USERNAME", "REPLACE_WITH_SERVER_PASSWORD");

  // Send HTTP POST request
  int httpResponseCode = http.GET();

  String payload = "{}";

  if (httpResponseCode > 0) {
    Serial.print("HTTP Response code: ");
    Serial.println(httpResponseCode);
    payload = http.getString();
  } else {
    Serial.print("Error code: ");
    Serial.println(httpResponseCode);
  }
  // Free resources
  http.end();

  return payload;
}

you may notice some random weirdness like wifi not connecting or empty serial output

[esp32beans]

The problem might be due to WiFi + RFID drawing too much current. WiFi draws lots of current when scanning for access points (that is when disconnected).Try connecting to WiFi with RFID off. After WiFi connected, turn on RFID. If disconnected, turn RFID off before reconnecting WiFi.

Or use a power supply capable of supplying 5V 1A or more. USB ports on computer usually can only supply 0.5A. Some powered USB hubs can supply more than 0.5A.

[studiosacchetti]

true. i will try thx

[studiosacchetti]

hello i have tried many configuration and different power supply (i used usb charger for phone), but i did not solve my issue. using this setup partially fix the problem. some time wifi not connect, some other wifi is ok but http get request failed

  auto cfg = M5.config();
  cfg.serial_baudrate = 115200;
  M5Dial.begin(cfg, false, false);

 mfrc522.PCD_Init();  // Init MFRC522.  初始化 MFRC522

i used usb charger, any ideas? i can send by email the full project if u want

[esp32beans]

Sorry, I do not have time to debug.

Turning down or off the display backlight when connecting WiFi might help. The backlight uses lots of current and I think defaults to maximum brightness. After connecting, turn the brightness up as desired.

M5Device.Display.setBrightness(M5_BRIGHTNESS);

[studiosacchetti]

ok will try soon. Is there any power supply that u may recommend to solve this issue? better usb or not?. i am a software developer not a electronic engineer regards