Serial Monitor Not Showing anything while using SoftwareSerial NodeMCU 12e 8266

Projects Programming
1

Hi first let me show you the diagram and the code

2838×1638 299 KB 

#include <U8g2lib.h>
#include <DFRobotDFPlayerMini.h>
#include <SoftwareSerial.h>

SoftwareSerial mp3Serial(3, 1); // RX, TX
DFRobotDFPlayerMini myDFPlayer;

U8G2_SH1106_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0);

#define u8g_logo_width 128
#define u8g_logo_height 64
static unsigned char u8g_logo_bits[] = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0xFB, 0xFF, 0x3F, 0xE0, 0x07,
  0x0E, 0xC0, 0x0F, 0x0E, 0x87, 0x03, 0x7E, 0x00, 0x00, 0x00, 0xFE, 0xFB,
  0xFF, 0x3F, 0xF0, 0x0F, 0x0E, 0xE0, 0x1F, 0x0E, 0x87, 0x03, 0xFF, 0x00,
  0x00, 0x80, 0xFF, 0xFB, 0xFF, 0x3F, 0xF8, 0x1F, 0x0E, 0xF0, 0x3F, 0x0E,
  0x87, 0x83, 0xFF, 0x01, 0x00, 0xC0, 0xFF, 0xFB, 0xFF, 0x3F, 0x7C, 0x1E,
  0x0E, 0xF0, 0x3C, 0x9E, 0x87, 0x83, 0xE7, 0x01, 0x00, 0xF0, 0xFF, 0xFB,
  0xFF, 0x3F, 0x3C, 0x1C, 0x0E, 0x78, 0x78, 0x9C, 0x83, 0x83, 0xC7, 0x01,
  0x00, 0xF8, 0xFF, 0xFB, 0xFF, 0x3F, 0x1C, 0x1C, 0x0E, 0x38, 0x70, 0x9C,
  0x83, 0x83, 0x1F, 0x00, 0x00, 0xFC, 0xFF, 0xFB, 0xFF, 0x3F, 0x1C, 0x00,
  0x0E, 0x38, 0x70, 0x9C, 0x83, 0x03, 0x7F, 0x00, 0x00, 0xFC, 0xFF, 0xFB,
  0xFF, 0x1F, 0x1C, 0x00, 0x0E, 0x38, 0x70, 0x98, 0x81, 0x03, 0xFE, 0x00,
  0x00, 0xFE, 0x3F, 0xF8, 0xFF, 0x1F, 0x1C, 0x00, 0x0E, 0x38, 0x70, 0xF8,
  0x81, 0x03, 0xF8, 0x01, 0x00, 0xFF, 0x0F, 0xF8, 0xFF, 0x0F, 0x3C, 0x1C,
  0x0E, 0x78, 0x78, 0xF8, 0x81, 0x83, 0xE1, 0x01, 0x00, 0xFF, 0x07, 0xF8,
  0xFF, 0x0F, 0x7C, 0x1E, 0x0E, 0xF0, 0x3C, 0xF8, 0x81, 0x83, 0xE3, 0x01,
  0x80, 0xFF, 0x03, 0xF8, 0xFF, 0x07, 0xF8, 0x1F, 0xFE, 0xF1, 0x3F, 0xF0,
  0x80, 0x83, 0xFF, 0x01, 0x80, 0xFF, 0x01, 0xF8, 0xFF, 0x03, 0xF0, 0x0F,
  0xFE, 0xE1, 0x1F, 0xF0, 0x80, 0x83, 0xFF, 0x00, 0x80, 0xFF, 0x00, 0xF8,
  0xFF, 0x01, 0xE0, 0x07, 0xFE, 0xC1, 0x0F, 0xF0, 0x80, 0x03, 0x7E, 0x00,
  0xC0, 0x7F, 0x00, 0xF8, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0xC0, 0x7F, 0x00, 0xF8, 0x7F, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xC0, 0x7F, 0x00, 0xF8,
  0x3F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0xC0, 0x3F, 0x00, 0xF8, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0xC0, 0x3F, 0x00, 0xF8, 0x03, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xC0, 0x3F, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0xC0, 0x3F, 0x00, 0xF8, 0xFF, 0x3F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0xC0, 0x3F, 0x00, 0xF8, 0xFF, 0x3F, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xC0, 0x3F, 0x00, 0xF8,
  0xFF, 0x3F, 0xF8, 0x0F, 0xFE, 0x03, 0x7C, 0x70, 0x70, 0x00, 0x00, 0x00,
  0xC0, 0x7F, 0x00, 0xF8, 0xFF, 0x3F, 0xF8, 0x1F, 0xFE, 0x07, 0x7C, 0xF0,
  0x78, 0x00, 0x00, 0x00, 0xC0, 0x7F, 0x00, 0xF8, 0xFF, 0x3F, 0xF8, 0x3F,
  0xFE, 0x0F, 0xFE, 0xE0, 0x38, 0x00, 0x00, 0x00, 0xC0, 0x7F, 0x00, 0xF8,
  0xFF, 0x3F, 0x38, 0x38, 0x0E, 0x0E, 0xFE, 0xE0, 0x3D, 0x00, 0x00, 0x00,
  0x80, 0xFF, 0x00, 0xF8, 0xFF, 0x3F, 0x38, 0x38, 0x0E, 0x0E, 0xFE, 0xC0,
  0x1D, 0x00, 0x00, 0x00, 0x80, 0xFF, 0x00, 0xF8, 0xFF, 0x3F, 0xF8, 0x3F,
  0x0E, 0x0E, 0xC6, 0xC0, 0x1D, 0x00, 0x00, 0x00, 0x80, 0xFF, 0x01, 0xF8,
  0xFF, 0x1F, 0xF8, 0x1F, 0xFE, 0x0F, 0xC7, 0x81, 0x0F, 0x00, 0x00, 0x00,
  0x00, 0xFF, 0x03, 0xF8, 0xFF, 0x1F, 0xF8, 0x3F, 0xFE, 0x07, 0xC7, 0x81,
  0x0F, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x0F, 0xF8, 0xFF, 0x0F, 0xF8, 0x3F,
  0xFE, 0x03, 0xFF, 0x01, 0x07, 0x00, 0x00, 0x00, 0x00, 0xFE, 0x3F, 0xF8,
  0xFF, 0x0F, 0x38, 0x38, 0x8E, 0x07, 0xFF, 0x01, 0x07, 0x00, 0x00, 0x00,
  0x00, 0xFE, 0xFF, 0xFB, 0xFF, 0x07, 0x38, 0x38, 0x0E, 0x87, 0xFF, 0x03,
  0x07, 0x00, 0x00, 0x00, 0x00, 0xFC, 0xFF, 0xFB, 0xFF, 0x03, 0xF8, 0x3F,
  0x0E, 0x87, 0x83, 0x03, 0x07, 0x00, 0x00, 0x00, 0x00, 0xF8, 0xFF, 0xFB,
  0xFF, 0x01, 0xF8, 0x1F, 0x0E, 0x8F, 0x83, 0x03, 0x07, 0x00, 0x00, 0x00,
  0x00, 0xF0, 0xFF, 0xFB, 0xFF, 0x00, 0xF8, 0x0F, 0x0E, 0x8F, 0x83, 0x03,
  0x07, 0x00, 0x00, 0x00, 0x00, 0xE0, 0xFF, 0xFB, 0x7F, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xFF, 0xFB,
  0x3F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0xFF, 0xFB, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF8, 0xFB, 0x01, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xE0, 0x45, 0x1C, 0x89,
  0xBC, 0xE7, 0x91, 0xC8, 0x81, 0x43, 0x0C, 0xC3, 0x89, 0x9E, 0x27, 0x02,
  0x20, 0x4C, 0x22, 0x99, 0x84, 0x20, 0x92, 0x29, 0x82, 0x44, 0x92, 0x24,
  0x8A, 0x82, 0x48, 0x01, 0xE0, 0x54, 0x02, 0xA9, 0x9C, 0x23, 0x92, 0x2A,
  0x80, 0x48, 0x86, 0x20, 0x52, 0x8E, 0x88, 0x00, 0x20, 0x54, 0x32, 0xA9,
  0x84, 0xE0, 0x91, 0x2A, 0x83, 0x48, 0x98, 0x20, 0x52, 0x82, 0x87, 0x00,
  0x20, 0x64, 0x22, 0xC9, 0x84, 0x20, 0x91, 0x2C, 0x82, 0x44, 0x92, 0x24,
  0x52, 0x82, 0x84, 0x00, 0xE0, 0x45, 0x3C, 0x89, 0xBC, 0x27, 0x92, 0xC8,
  0x83, 0x43, 0x0C, 0xC3, 0x21, 0x9E, 0x88, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00,
};
int Green1 = D3;
int Red1 = D4;
int Blue1 = D5;

int Green2 = D6;
int Red2 = D7;
int Blue2 = D8;



void setup(void) {

  pinMode ( Green1, OUTPUT);
  pinMode ( Red1, OUTPUT);
  pinMode ( Blue1, OUTPUT);

  pinMode ( Green2, OUTPUT);
  pinMode ( Red2, OUTPUT);
  pinMode ( Blue2, OUTPUT);


  u8g2.begin();
  u8g2.setFlipMode(1);
  Serial.begin (115200);
  mp3Serial.begin (9600);
  myDFPlayer.begin (mp3Serial);
  delay(1000);
  myDFPlayer.volume(10);
  myDFPlayer.EQ(DFPLAYER_EQ_BASS);
  u8g2.firstPage();
  do {
    u8g2.drawXBM( 0, 0, u8g_logo_width, u8g_logo_height, u8g_logo_bits);

  } while ( u8g2.nextPage() );

  /// delay(3000);
  myDFPlayer.play(1);




}

void loop(void) {
  Serial.println(100);
delay(1000);

}

Note: please read everything before jumping to conclusions XD and there will be some important notes at the end :

As you can see the code is not finished yet but that's not the issue the issue is I can't see anything on the Serial Monitor.

I started troubleshooting and made sure that the settings for SM and the IDE are correct.
I ended up figuring out that if I used SoftwareSerial the problem happens.

for example, this simple test code works fine on the same NodMCU

void setup() {
  // put your setup code here, to run once:
  Serial.begin (115200);

}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println(100);
delay(1000);
}

But if I used the SoftwareSerial in this simple code nothing shows up on the serial monitor !

#include <U8g2lib.h>
#include <DFRobotDFPlayerMini.h>
#include <SoftwareSerial.h>

SoftwareSerial mp3Serial(3, 1); // RX, TX
DFRobotDFPlayerMini myDFPlayer;

void setup() {
  // put your setup code here, to run once:
  Serial.begin (115200);
  mp3Serial.begin (9600);
  myDFPlayer.begin (mp3Serial);

}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println(100);
delay(1000);
}

Can you help?

2

Notes :

1- RX/TX of the Dfplayer Mini aren't connected while testing this and I know that I can't use them at the same time with the USB is connected to the PC.

2- I have thought that might be me using RX/TX pins on the board for the software serial but unfortunately I can't use the other RX/TX pins because some of them are occupied by the LEDs what do you think?

3- I started this project with a replica ( not official ) NodeMCU 8266 ( there is no info printed on the back BTW )
The funny thing is that the SM works fine also the RX/TX pins are working while the USB being connected ! one of a kind maybe? anyway, I shorted that bad boy by mistake and went and got the Amica NodeMCU and now I'm facing this issue.

4- if this doesn't work I might go and try to buy the same unofficial replica NodeMCU to save me time.

5- I might use the A0 for a sound detector.

6- The full code works fine with all parts except the Serial Monitor issue.

7-LED's will be PWM controlled and analogWrite is working in this diagram.
Thanks for the help.

3

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