How to pass a jsonObject or string back and forth between arduino and node mcu? (bi-directional)

Projects Programming
1

I tried some remedies for the same but didn’t worked out well so I need some more help with this in the form of code or anything that eases and helps me with the above question.
arduino.ino

#include <ArduinoJson.h>
#include <SoftwareSerial.h>
// 0 = Rx & 1 = Tx
SoftwareSerial nodemcu(0, 1);
String state = "";

void setup()
{
   Serial.begin(9600);
   nodemcu.begin(115200);
}

void loop()
{
    DynamicJsonDocument doc(1024);
    doc["type"] = "arduino";
    serializeJson(doc, nodemcu);

    delay(3000);
    if (Serial.available()> 1)
    {
        DynamicJsonDocument doc(1024);
        DeserializationError error = deserializeJson(doc, Serial);
        if (error)
        {
          Serial.println("Invalid Json Object");
        }
        else
        {
          String type = doc["led"].as<String>();
          Serial.println("type = " + type);
        }
    }
}

node_mcu.ino

#include <ArduinoJson.h>
#include <SoftwareSerial.h>
// D6 = Rx & D5 = Tx
SoftwareSerial nodemcu(D6, D5);
String state = "";
void setup()
{
   Serial.begin(9600);
   nodemcu.begin(115200);   
}

void loop()
{
    DynamicJsonDocument doc(1024);
    doc["type"] = "nodemcu";
    serializeJson(doc, Serial);
  
    delay(1500);
    if (nodemcu.available())
    {
        DynamicJsonDocument doc(1024);
        DeserializationError error = deserializeJson(doc, nodemcu);
        if (error)
        {
            Serial.println(error.c_str());
        }
        else
        {
            String type = doc["type"].as<String>();
            Serial.println("type = " + type);
        }
    }
}

diagram:

node
node1271×702 150 KB

2

This is an Uno? Pins 0, 1 are the hardware serial pins used by Serial.print() etc. You can't also use them as software serial for another device.

3

yes

4

Pick other pins for SoftwareSerial so you don't conflict with Serial.

5

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