In AP, DNS server always redirects to 192.168.4.1 no mater what APStaticIP is set to.

Describe the bug

My understanding is that the intention of the code is to auto direct the user connected to the config portal once connected. Currently due to a misconfiguration in the DNS server if APStaticIP is set the user has to enter the IP of APStaticIP to the browser.

This is because the DNS server is configured with WiFi.softAPIP() before softAP itself has been given the value of APStaticIP.

Esentially the DNS entry always redirects to 192.168.4.1.

Steps to Reproduce

Use the ESP32_FSWebServer_DRD sketch.
Connect to AP.
Config page only appears when 192.168.100.1 is used in the browser.

Proposed solution

DNS Setup

ESP_WiFiManager/src/ESP_WiFiManager-Impl.h

Line 364 in 27f8867

if (! dnsServer->start(DNS_PORT, "*", WiFi.softAPIP()))

is before AP ip configuration

ESP_WiFiManager/src/ESP_WiFiManager-Impl.h

Line 424 in 27f8867

if (_WiFi_AP_IPconfig._ap_static_ip)

.
Either move DNS setup after the AP configuration or put another checker at DNS setup to check if APStaticIP is set.

Hi @yiancar

Thanks a lot for your smart eyes which spot the puzzling-to-me captive-portal issue.

I've tested the fix and will release a new version within today with your contribution noted.

Waiting for more of your bug spotting. 👍

Best Regards,

The preliminary test for you to enjoy 👍

Starting ConfigOnDoubleReset with DoubleResetDetect using LittleFS on ESP32_DEV
ESP_WiFiManager v1.6.0
ESP_DoubleResetDetector v1.1.1
[WM] RFC925 Hostname = ConfigOnDoubleReset
[WM] setAPStaticIPConfig
[WM] Set CORS Header to :  Your Access-Control-Allow-Origin
ESP Self-Stored: SSID = HueNet1, Pass = 12345678
[WM] * Add SSID =  HueNet1 , PW =  12345678
Got ESP Self-Stored Credentials. Timeout 120s for Config Portal
LittleFS Flag read = 0xD0D01234
doubleResetDetected
Saving config file...
Saving config file OK
Open Config Portal without Timeout: Double Reset Detected
Starting configuration portal.
[WM] WiFi.waitForConnectResult Done
[WM] SET AP
[WM] Custom AP IP/GW/Subnet =  192.168.232.1 192.168.232.1 255.255.255.0
[WM] Configuring AP SSID = ESP_E92DE6B4
[WM] AP PWD = MyESP_E92DE6B4
[WM] AP Channel = 2
[WM] AP IP address = 192.168.232.1
[WM] HTTP server started
[WM] ESP_WiFiManager::startConfigPortal : Enter loop
dhcps: send_nak>>udp_sendto result 0
[WM] Handle root
[WM] captivePortal: hostHeader =  192.168.232.1
[WM] captivePortal: hostHeader =  192.168.232.1
[WM] Handle root
[WM] captivePortal: hostHeader =  test.mosquitto.org
[WM] Request redirected to captive portal :  192.168.232.1     <==========  OK now
[WM] Handle root
[WM] captivePortal: hostHeader =  192.168.232.1

Hi @yiancar

The new ESP_WiFiManager releases v1.6.1 has just been published, with the note about your contribution in Contributions and Thanks

Cheers,

Releases v1.6.1

Fix captive-portal bug if Config Portal AP address is not default 192.168.4.1. Check In AP, DNS server always redirects to 192.168.4.1 no mater what APStaticIP is set to. #58
Fix MultiWiFi bug.

Cheers thank you for the quick reply!