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Need Help With My Project
1

I am getting this common error. Tried to find a solution, but had no luck. So please pardon me for opening a new thread for this common issue. Any clue on this please?

Serial Monitor Output :

 ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 3584, room 16 
tail 0
chksum 0xb0
csum 0xb0
v5d3af165
~ld
⸮⸮⸮⸮

The Board :
The NodeMCU board has a lebel “new NodeMCU V3”

Wifi Properties :

|SSID:|SLT_FIBER |
|Protocol:|Wi-Fi 4 (802.11n)|
|Security type:|WPA2-Personal|
|Network band:|2.4 GHz|

The Code :

#define BLYNK_PRINT Serial
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "vzcjMnE4HIwi5_9g-E3CXFD4tTJQamT0";

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "SLT_FIBER";
char pass[] = "****";

void setup()
{
  // Debug console
  Serial.begin(9600);

  Blynk.begin(auth, ssid, pass);
}

void loop()
{
  Blynk.run();
}
2

Presumably your serial monitor was set to 74880 to get this output?

If so, then you need to use the same baud rate in your sketch, not 9600…

That will give you legible information about what is happening when your device tries to connect to WiFi and Blynk.

Do you have any connections to your NodeMCU, other than the USB cable?

Pete.

3

Thanks a lot for the quick response.
I changed the baud rate in the code. Now here is the serial monitor output.

 ets Jan  8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 3584, room 16 
tail 0
chksum 0xb0
csum 0xb0
v5d3af165
~ld
[64] Connecting to SLT_FIBER

I do not have any connections to NodeMCU other than the USB cable.

4

So, it’s not getting past the WiFi connection stage.
Both SSID and the WiFi password are case sensitive, so ensure that these are EXACTLY as they appear in your router.

If you’re using any WiFi repeaters then you may want to turn them off temporarily. If you’ve set-up MAC address filtering in your router then ensure that you add the NodeMCU’s MAC address to your whitelist.

Pete.

5

OK I’ll check for these again.

I am 100% about the ssid and password. I checked that several times. And here I don’t have any repeaters either. And no Mac filters defined. I can connect any device to the router by entering this same password.

Can there be any issue with the NodeMCU board. I checked with another board as well and the result is same. Both the boards are cheap chinese products bought through AliExpress. Here I will attach the images of both.

board1
board1864×1152 77.6 KB

6

I don’t think it’s the board.
Try rebooting your router if the SSID and password are correct.

Pete.

7

OK Mr. Pete. Thanks for your valuable guidance. Will try more and let you know.