Version 2.0.10 slows down wifi connect

[jtkDvlp]

Board

DOIT ESP32 DEVKIT V1

Device Description

Nothing special

Hardware Configuration

Nothing connected

Version

v2.0.10

IDE Name

Arduino IDE

Operating System

Windows 10

Flash frequency

40 Mhz

PSRAM enabled

no

Upload speed

921600

Description

Following code connects wifi after initial connect within about 200ms using lib version 2.0.9. With version 2.0.10 it took up to 1500ms.

Sketch

#include <WiFi.h>

void setup() {
  WiFi.setAutoConnect(false);
  WiFi.setAutoReconnect(false);

  Serial.begin(115200);
  
  long starttime = millis();
  Serial.println("Fast connect to WiFi...");
  WiFi.persistent(true);
  WiFi.config(IPAddress(XXX), IPAddress(XXX), IPAddress(XXX), IPAddress(XXX));
  WiFi.begin();
  if(WiFi.waitForConnectResult(5000) != WL_CONNECTED) {
    Serial.println("Fast connect failed");
    byte bssid[] = {XXX};
    WiFi.begin("XXX", "XXX", XXX, bssid);

    while (WiFi.status() != WL_CONNECTED) {
      delay(500);
      Serial.println("Connecting to WiFi..");
    }
  }

  Serial.print("Connected to the WiFi network in ");
  Serial.print(millis() - starttime);
  Serial.println("ms");

  Serial.println(WiFi.SSID());
  Serial.println(WiFi.BSSIDstr());
  Serial.println(WiFi.channel());
  Serial.println(WiFi.localIP());
  
}

void loop() {
  // put your main code here, to run repeatedly:

}

Debug Message

###With Version 2.0.9:
20:38:27.165 -> Fast connect to WiFi...
20:38:32.330 -> Fast connect failed
20:38:32.862 -> Connecting to WiFi..
20:38:33.376 -> Connecting to WiFi..
20:38:33.376 -> Connected to the WiFi network in 6204ms
20:38:33.376 -> XXX
20:38:33.376 -> XXX
20:38:33.376 -> XXX
20:38:33.376 -> XXX

20:38:36.672 -> Fast connect to WiFi...
20:38:36.890 -> Connected to the WiFi network in 214ms
20:38:36.890 -> XXX
20:38:36.890 -> XXX
20:38:36.890 -> XXX
20:38:36.890 -> XXX

###With Version 2.0.10
20:53:43.735 -> Fast connect to WiFi...
20:53:48.947 -> Fast connect failed
20:53:49.459 -> Connecting to WiFi..
20:53:49.974 -> Connecting to WiFi..
20:53:49.974 -> Connected to the WiFi network in 6202ms
20:53:49.974 -> XXX
20:53:49.974 -> XXX
20:53:49.974 -> XXX
20:53:49.974 -> XXX

20:53:55.699 -> Fast connect to WiFi...
20:53:56.742 -> Connected to the WiFi network in 1028ms
20:53:56.742 -> XXX
20:53:56.742 -> XXX
20:53:56.742 -> XXX
20:53:56.742 -> XXX

Other Steps to Reproduce

No response

I have checked existing issues, online documentation and the Troubleshooting Guide

• [x] I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[nemetila]

Hi, I have similar problem:

• update to Version 2.0.11: WIFI connect takes ~800ms
• downgrade to Version 2.0.8: WIFI connect takes ~200ms

It seems that releases from 2.0.10 changed the ESP-IDF version from v4.4.4 to v4.4.5.

[ElFishi]

Seconded. 2.09 ~ 100-200ms 2.10 ~ 1100-1200ms 2.11 ~ 800ms

[XCIggo]

Hello, I have the same problem, and I did some tests for my understanding of versioning:

platformio.ini common: board = esp32-s3-devkitc-1 framework = espidf, arduino

CASE1: platform = espressif32

PACKAGES:
 - framework-arduinoespressif32 @ 3.20011.230801 (2.0.11)
 - framework-espidf @ 3.40405.230623 (4.4.5)
 - tool-cmake @ 3.16.4
 - tool-esptoolpy @ 1.40501.0 (4.5.1)
 - tool-idf @ 1.0.1
 - tool-mconf @ 1.4060000.20190628 (406.0.0) 
 - tool-ninja @ 1.9.0
 - toolchain-esp32ulp @ 1.23500.220830 (2.35.0)
 - toolchain-riscv32-esp @ 8.4.0+2021r2-patch5
 - toolchain-xtensa-esp32s3 @ 8.4.0+2021r2-patch5

result:

@123:Connect: Persistent OK........[FastCo Ok 889Ms][Ping 309Ms]
@1321:Connect Success IP:192.168.10.83 [1198Ms]

CASE2: platform = https://github.com/platformio/platform-espressif32.git platform_packages= framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git

PACKAGES:
 - framework-arduinoespressif32 @ 2.0.6+sha.e0657db
 - framework-espidf @ 3.40405.230623 (4.4.5) 
 - tool-cmake @ 3.16.4
 - tool-esptoolpy @ 1.40501.0 (4.5.1)
 - tool-idf @ 1.0.1
 - tool-mconf @ 1.4060000.20190628 (406.0.0)
 - tool-ninja @ 1.9.0
 - toolchain-esp32ulp @ 1.23500.220830 (2.35.0)
 - toolchain-riscv32-esp @ 8.4.0+2021r2-patch5
 - toolchain-xtensa-esp32s3 @ 8.4.0+2021r2-patch5

result:

@122:Connect: Persistent OK........[FastCo Ok 873Ms][Ping 312Ms]
@1309:Connect Success IP:192.168.10.83 [1187Ms]

CASE3: platform = https://github.com/platformio/platform-espressif32.git platform_packages =framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git#2.0.11

PACKAGES:
 - framework-arduinoespressif32 @ 2.0.11+sha.ae9dae4
 - framework-espidf @ 3.40405.230623 (4.4.5)
 - tool-cmake @ 3.16.4
 - tool-esptoolpy @ 1.40501.0 (4.5.1)
 - tool-idf @ 1.0.1
 - tool-mconf @ 1.4060000.20190628 (406.0.0)
 - tool-ninja @ 1.9.0
 - toolchain-esp32ulp @ 1.23500.220830 (2.35.0)
 - toolchain-riscv32-esp @ 8.4.0+2021r2-patch5
 - toolchain-xtensa-esp32s3 @ 8.4.0+2021r2-patch5

result:

@123:Connect: Persistent OK.........[FastCo Ok 923Ms][Ping 310Ms]
@1356:Connect Success IP:192.168.10.83 [1233Ms]

CASE4: platform = https://github.com/platformio/platform-espressif32.git platform_packages = framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git#2.0.9 espressif/toolchain-xtensa-esp32s3 @ 8.4.0 framework-espidf @ 3.40404

PACKAGES:
 - framework-arduinoespressif32 @ 2.0.9+sha.3670e2b
 - framework-espidf @ 3.40404.0 (4.4.4)
 - tool-cmake @ 3.16.4
 - tool-esptoolpy @ 1.40501.0 (4.5.1)
 - tool-idf @ 1.0.1
 - tool-mconf @ 1.4060000.20190628 (406.0.0) 
 - tool-ninja @ 1.9.0
 - toolchain-esp32ulp @ 1.23500.220830 (2.35.0)
 - toolchain-riscv32-esp @ 8.4.0+2021r2-patch5
 - toolchain-xtensa-esp32s3 @ 8.4.0+2021r2-patch5

result:

@121:Connect: Persistent OK.[FastCo Ok 93Ms][Ping 308Ms]
@522:Connect Success IP:192.168.10.83 [401Ms]

CASE5: framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git#2.0.11 espressif/toolchain-xtensa-esp32s3 @ 8.4.0 framework-espidf @ 3.40404

PACKAGES:
 - framework-arduinoespressif32 @ 2.0.11+sha.ae9dae4
 - framework-espidf @ 3.40404.0 (4.4.4)
 - tool-cmake @ 3.16.4
 - tool-esptoolpy @ 1.40501.0 (4.5.1)
 - tool-idf @ 1.0.1
 - tool-mconf @ 1.4060000.20190628 (406.0.0)
 - tool-ninja @ 1.9.0
 - toolchain-esp32ulp @ 1.23500.220830 (2.35.0)
 - toolchain-riscv32-esp @ 8.4.0+2021r2-patch5
 - toolchain-xtensa-esp32s3 @ 8.4.0+2021r2-patch5

result:

@121:Connect: Persistent OK.[FastCo Ok 92Ms][Ping 309Ms]
@522:Connect Success IP:192.168.10.83 [401Ms]

I tried several other configurations, but it seems that the connection time is relative to framework-espidf from 4.4.4 to 4.4.5, while the change version of arduino-esp32 gives the same results.

I'm not sure how versioning works question 1: why CASE1 return 2.0.11 (normal) and CASE2 return 2.0.6 (?!) question 2: Is there a better parameter or method to maintain version consistency between framework-arduinoespressif32,espressif/toolchain-xtensa-esp32s3, and framework-espidf?

My partial conclusion, change from 2.0.9/4.4.4 (CASE4) to 2.0.11/4.4.5(CASE3) change connection time from 100Ms to 800-900Ms, force in 2.0.11/4.4.4 (CASE5) gives a connection at 100Ms.

I am wrong?

[SuGlider]

The time for 2.0.10/11 for Fast Connect with WiFi.begin() using the previous connection (NVS data) done to the same SSID is about 700~1000 ms. This is confirmed with the data presented in this issue.

But I can't confirm that using 2.0.8/2.0.9, it can connect in 200ms or so, using WPA2.

I have found it takes about 3500 ms instead...

What is the Wireless security encryption of the tested WiFi Network? My WLAN uses WPA2_PSK.

If you are using WPA_PSK, please set it with WiFi.setMinSecurity(WIFI_AUTH_WPA_PSK); and try it.

[SuGlider]

I have changed my WiFi AP to WPA + Arduino 2.0.9 and I still can't get the Fast WiFi Connect to achieve 200ms. It connects in 3.5 seconds.

[SuGlider]

@jtkDvlp - I need more information in order to reproduce the issue by achieving the 200ms as here stated.

Please trun on the Debug Message: IDF Menu->Tools->"Core Debuf Level":"Verbose". Let me know what exactly is your WiFi setting using. Also, please, erase your ESP32 flash just once, by using the option IDE Menu->Tools->"Erase All Flash Before Sketch Upload":"Enable" and then return it back to "Disabled" in order to use NVS information in the fast WiFi connecting mode.

[TD-er]

If your connect duration is like 3.5 seconds, I guess you include the WiFi scan time? Have you tried also connecting directly to a specific BSSID at a specific channel? Like when you already have the results of a WiFi scan and try to connect to a set of possible candidates.

[XCIggo]

From my comment 2 week ago , the test are done on a WPA2 - AES (recommandé) network, with fast connect (persistent) in 200mS when ip, gateway , bssid,.. are known by a previous normal connect or scan (3-6seconds) .

I have no short code to give, but the sketch example from jtkDvlp is good.

My persistent registering after scan is:

 WiFi.setHostname(DBSvc.SysDyn.strHOSTName); //define hostname   
        WiFi.setAutoReconnect(false);
        WiFi.mode(WIFI_STA);                             
        WiFi.config( DBSvc.SysDyn.NetworkSTA_IP, DBSvc.SysDyn.NetworkSTA_GATEWAY, DBSvc.SysDyn.NetworkSTA_SUBNET,  DBSvc.SysDyn.NetworkSTA_DNS1, DBSvc.SysDyn.NetworkSTA_DNS2 );  //DNS Google (8.8.8.8), CloudFlare (1.1.1.1)      
        WifiState=WiFi.begin(DBSvc.SysSettings.STAssid, DBSvc.SysSettings.STApassword, DBSvc.SysDyn.WifiSTA_Channel,  DBSvc.SysDyn.WifiSTA_BSSID);
        WiFi.persistent(true);          //set _persistent  

My persistent reconnect code sequence is:

        WiFi.setHostname(DBSvc.SysDyn.strHOSTName); //define hostname          
        WiFi.mode(WIFI_STA);        
        WiFi.config( DBSvc.SysDyn.NetworkSTA_IP, DBSvc.SysDyn.NetworkSTA_GATEWAY, DBSvc.SysDyn.NetworkSTA_SUBNET,  DBSvc.SysDyn.NetworkSTA_DNS1 , DBSvc.SysDyn.NetworkSTA_DNS2 );
        WifiState=WiFi.begin();    

[VojtechBartoska]

Issue update: The issue moved to 3.0.0 milestone, it is related to the Performance so it is not crucial for next release.

We will test this also against IDF 5 to see, if it improves or behave the same.

[benj919]

@SuGlider / @VojtechBartoska

A bit later, but in case this is helpful in general. I have struggled with the same slow connect for a day and observed vastly different results depending on which wifi network I try to connect my esp32 board to.

(Re-)connecting to my phone hotspot is ~150ms including acquiring an IP through dhcp. For my home wifi it always takes ~1500+ ms to connect, and another ~1500ms to acquire an ip address. Saving the bssid/channel to rtc_ram and restoring does not change this, neither does a fixed ip allocation in the dhcp server. A static ip on the esp obviously skips the dhcp time.

Board: ESP32-WROOM-32 / esp32 dev-kit

Board Manager: Espressif Systems / esp32: 2.0.14 (same ballpark results when downgrading to Arduino 2.0.9)

WiFi.begin(ssid, password);

2x Ubiquity UAP-AC-Pro, opnSense router

intial connect (once, with persistence): ~2000ms connect, ~1500ms dhcp

[   336][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 0 - WIFI_READY
[   400][V][WiFiGeneric.cpp:340] _arduino_event_cb(): STA Started
[   401][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 2 - STA_START
[   420][V][WiFiGeneric.cpp:97] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
[  2395][V][WiFiGeneric.cpp:355] _arduino_event_cb(): STA Connected: [...], Auth: WPA2_WPA3_PSK
[  2397][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 4 - STA_CONNECTED
[  3914][V][WiFiGeneric.cpp:369] _arduino_event_cb(): STA Got New IP:[...]
[  3914][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 7 - STA_GOT_IP

Reconnect: ~1500ms connect, ~1500ms dhcp

[   337][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 0 - WIFI_READY
[   350][V][WiFiGeneric.cpp:340] _arduino_event_cb(): STA Started
[   351][V][WiFiGeneric.cpp:97] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
[   351][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 2 - STA_START
[  1729][V][WiFiGeneric.cpp:355] _arduino_event_cb(): STA Connected: [...], Auth: WPA2_WPA3_PSK
[  1730][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 4 - STA_CONNECTED
[  3243][V][WiFiGeneric.cpp:369] _arduino_event_cb(): STA Got New [...]
[  3243][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 7 - STA_GOT_IP

---

Fairphone 4 Hotspot

Initial connection (once, with persistence): 2200ms

[   337][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 0 - WIFI_READY
[   400][V][WiFiGeneric.cpp:340] _arduino_event_cb(): STA Started
[   401][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 2 - STA_START
[   421][V][WiFiGeneric.cpp:97] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
[  1338][V][WiFiGeneric.cpp:355] _arduino_event_cb(): STA Connected: [...], Auth: WPA2_PSK
[  1340][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 4 - STA_CONNECTED
[  4552][V][WiFiGeneric.cpp:369] _arduino_event_cb(): STA Got New IP:[...]
[  4552][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 7 - STA_GOT_IP

Reconnect: 150ms

[   338][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 0 - WIFI_READY
[   351][V][WiFiGeneric.cpp:340] _arduino_event_cb(): STA Started
[   352][V][WiFiGeneric.cpp:97] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
[   352][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 2 - STA_START
[   407][V][WiFiGeneric.cpp:355] _arduino_event_cb(): STA Connected: [...], Auth: WPA2_PSK
[   409][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 4 - STA_CONNECTED
[   435][V][WiFiGeneric.cpp:369] _arduino_event_cb(): STA Got New IP: [...]
[   436][D][WiFiGeneric.cpp:1039] _eventCallback(): Arduino Event: 7 - STA_GOT_IP

[VojtechBartoska]

We can retest this when https://github.com/espressif/arduino-esp32/pull/8760 is merged, assigning to 3.0.0-rc1 milestone.

[VojtechBartoska]

Hello, can you please validate this against 3.0.0-RC1 version? Thanks

[VojtechBartoska]

Closing as solved, if needed, you can reopen.