Nodemcu ESP8266 WiFi connection

Projects Networking, Protocols, and Devices
1

Hi everybody,
I just bought a Nodemcu ESP8266 Lolin module but when I tried to connect it to a wifi router it wouldn't connect but it could connect to an android hotspot.
I have searched every topic here but still haven't found the solution.
I use 2.4ghz WiFi and Wpa2 password protocol

2

could the WiFi router be 5GHz?
I seem to remember the ESP8266 only works at 2.4GHz
post your code (using code tags </>)?

3
  • post your test code in code tags.
  • How long is your SSID on the router?
  • How long is your Password on the router?
4

Is it a hidden network?

5

I use this basic code from esp8266 library documentation

#include <ESP8266WiFi.h>

void setup()
{
  Serial.begin(115200);
  Serial.println();

  WiFi.begin("Ronggolawe", "12345678");

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

  Serial.print("Connected, IP address: ");
  Serial.println(WiFi.localIP());
}

void loop() {}
6

Nope, it showing ini WiFi network

7

Wifi status code is 3 say it CONNECTED but when I test ping, result is RTO
The router configuration is also 2.4 ghz and the password 10 characters long

8

if I run the code of post 5 (after editing SSID and password) it compiles links and runs on a ESP8266 setting Tools>Board to ESP8266 Dev Module
serial monitor displays

Connecting.............
Connected, IP address: 192.168.1.65

if I ping 192.168.1.65 on a PC CMD displays

C:\Users\bb>ping 192.168.1.65

Pinging 192.168.1.65 with 32 bytes of data:
Reply from 192.168.1.65: bytes=32 time=163ms TTL=255
Reply from 192.168.1.65: bytes=32 time=79ms TTL=255
Reply from 192.168.1.65: bytes=32 time=100ms TTL=255
Reply from 192.168.1.65: bytes=32 time=20ms TTL=255

Ping statistics for 192.168.1.65:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 20ms, Maximum = 163ms, Average = 90ms

do you have control of the router?
if so can it display the connected device IPs etc?

9

Yes i do, serial monitor print I'm connected but router I don't see device name in there
But it android hotspot it works
My router is TP-LINK wr840n

10

my router device list under 2.4HZ the ESP8266 is displayed as
image

no idea what your problem is

11

Yeah, idk what cause of this problem :confused:

12

Looks like the problem is router
I had to change to old router with legacy mode
Now it works well

13

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.