[GH-ISSUE #544] ESP8266 does not reconnect after exiting promiscuous mode #456

New issue

Open

opened 2026-02-28 01:25:23 +03:00 by kerem · 2 comments

kerem commented

2026-02-28 01:25:23 +03:00

Owner

Originally created by @kubark42 on GitHub (Mar 2, 2018).
Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/544

Basic Infos

Hardware

WiFimanager Branch/Release: 0.12.0

Hardware: Huzzah

Core Version: 2.4.0

Description

When promiscuous mode is turned on and then off, WifiManager will no longer connect.

Settings in IDE

Module: Huzzah ESP8266

Sketch

#include <ESP8266WiFi.h>          //https://github.com/esp8266/Arduino

//needed for library
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h>         //https://github.com/tzapu/WiFiManager

WiFiManager wifiManager;

void setup() {
  // put your setup code here, to run once:
  Serial1.begin(115200);
  Serial1.setDebugOutput(true); // Turn on WIFI debug info

  wifiManager.autoConnect("ssid", "password");

  //if you get here you have connected to the WiFi
  Serial1.println("connected...yeey :)");
}

void loop() {
  enableWifiMonitorMode();
  Serial1.print("before (ms): ");
  Serial1.println(millis());
  enableWifiClient();
  Serial1.print("after (ms): ");
  Serial1.println(millis());
}

void enableWifiMonitorMode()
{
  // Send ESP into promiscuous mode. At this point, it stops being able to connect to the internet
  Serial1.println("Turning on wifi monitoring.");
  //    wifi_set_opmode(WIFI_STA);
  wifi_set_promiscuous_rx_cb(receiveWifiSniff_cb);
  wifi_promiscuous_enable(true);
}

void enableWifiClient()
{
  // Send ESP into promiscuous mode. At this point, it stops being able to connect to the internet
  Serial1.println("Turning off wifi monitoring.");
  wifi_promiscuous_enable(false);

  if (!wifiManager.autoConnect("ssid", "password")) {
    Serial1.println("failed to connect, timed out...");
  }

}

void receiveWifiSniff_cb(uint8_t *buf, uint16 len)
{
}

Debug Messages

rscandone
scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 1
cnt 

connected with SSID, channel 1
dhcp client start...
ip:192.168.86.109,mask:255.255.255.0,gw:192.168.86.1
connected...yeey :)
Turning on wifi monitoring.
state: 5 -> 0 (0)
rm 0
before(ms): 4158
Turning off wifi monitoring.
scandone
state: 0 -> 2 (b0)
state: 2 -> 3 (0)
state: 3 -> 5 (10)
add 0
aid 1
cnt 

connected with SSID, channel 1
dhcp client start...
pm open,type:2 0

Originally created by @kubark42 on GitHub (Mar 2, 2018). Original GitHub issue: https://github.com/tzapu/WiFiManager/issues/544 ### Basic Infos #### Hardware WiFimanager Branch/Release: 0.12.0 Hardware: Huzzah Core Version: 2.4.0 ### Description When promiscuous mode is turned on and then off, WifiManager will no longer connect. ### Settings in IDE Module: Huzzah ESP8266 ### Sketch ```cpp #include <ESP8266WiFi.h> //https://github.com/esp8266/Arduino //needed for library #include <DNSServer.h> #include <ESP8266WebServer.h> #include <WiFiManager.h> //https://github.com/tzapu/WiFiManager WiFiManager wifiManager; void setup() { // put your setup code here, to run once: Serial1.begin(115200); Serial1.setDebugOutput(true); // Turn on WIFI debug info wifiManager.autoConnect("ssid", "password"); //if you get here you have connected to the WiFi Serial1.println("connected...yeey :)"); } void loop() { enableWifiMonitorMode(); Serial1.print("before (ms): "); Serial1.println(millis()); enableWifiClient(); Serial1.print("after (ms): "); Serial1.println(millis()); } void enableWifiMonitorMode() { // Send ESP into promiscuous mode. At this point, it stops being able to connect to the internet Serial1.println("Turning on wifi monitoring."); // wifi_set_opmode(WIFI_STA); wifi_set_promiscuous_rx_cb(receiveWifiSniff_cb); wifi_promiscuous_enable(true); } void enableWifiClient() { // Send ESP into promiscuous mode. At this point, it stops being able to connect to the internet Serial1.println("Turning off wifi monitoring."); wifi_promiscuous_enable(false); if (!wifiManager.autoConnect("ssid", "password")) { Serial1.println("failed to connect, timed out..."); } } void receiveWifiSniff_cb(uint8_t *buf, uint16 len) { } ``` ### Debug Messages ``` rscandone scandone state: 0 -> 2 (b0) state: 2 -> 3 (0) state: 3 -> 5 (10) add 0 aid 1 cnt connected with SSID, channel 1 dhcp client start... ip:192.168.86.109,mask:255.255.255.0,gw:192.168.86.1 connected...yeey :) Turning on wifi monitoring. state: 5 -> 0 (0) rm 0 before(ms): 4158 Turning off wifi monitoring. scandone state: 0 -> 2 (b0) state: 2 -> 3 (0) state: 3 -> 5 (10) add 0 aid 1 cnt connected with SSID, channel 1 dhcp client start... pm open,type:2 0 ```