Lqfp32 mini nano board

Projects General Guidance
1

I bought this board Lqfp32 mini nano and cannot get serial communication between nodemcu and this board... Did someone has this problem? I have voltage divider btwen tx pin of mini nano and Rx pin on nodemcu side.

2

Can you post the missing part of your question ?

2 Likes
3

There is no missing part.... I connected Lqfp32 board to nodemcu rx/tx pins to get serial communication but cannot get it

4

Google.

5

I already googled but did not find it

6

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1 Like
7

What is strange i wrote code which sends message from one board to other and after message is received board respond with message which never arrives to first board... Like TX from 2nd board is not working... But then i switched scenario and 2nd board is sending message to first board, message is received and response never arrives to 2nd board.... I tested tx/rx on both boards and it worked normally

8

Do you think the code and a schematic of how you've wired things together might help someone help you?

a7

9

If you have knowledge and had problem I talk about you can help

10

Connected Rx to TX and TX to Rx on boards

This is Nodemcu code:

  Serial.begin(9600);  // USB serial for debugging
  Serial1.begin(9600); // Serial1 for communication with Mini Nano
  delay(1000);
  Serial.println("NodeMCU ready.");
}

void loop() {
  // Send message to Nano
  Serial1.println("HEY NODE IS HERE");
  Serial.println("Message sent to Nano: HEY NODE IS HERE");
  delay(1000); // Wait for response

  // Check for response from Nano
  if (Serial1.available()) {
    String messageFromNano = Serial1.readStringUntil('\n');
    Serial.println("Message from Nano: " + messageFromNano);
  }
  delay(2000);
}

And Code for mini nano

void setup() {
  Serial.begin(9600); // Use Serial for communication with NodeMCU
  delay(1000);
  // Print a message to confirm setup completion
  Serial.println("Nano ready.");
}

void loop() {
  // Check for message from NodeMCU
  if (Serial.available()) {
    String messageFromNodeMCU = Serial.readStringUntil('\n');
    // Print the received message for debugging
    Serial.println("Message from NodeMCU: " + messageFromNodeMCU);

    // Send response back to NodeMCU
    Serial.println("HEY MINI IS HERE");
    // Print a message to confirm the response was sent
    Serial.println("Response sent to NodeMCU: HEY MINI IS HERE");
  }
  delay(1000);
}

On serial monitor of Nodemcu i got:
1:40:37.403 -> Message sent to Nano: HEY NODE IS HERE
11:40:40.368 -> Message sent to Nano: HEY NODE IS HERE
11:40:43.368 -> Message sent to Nano: HEY NODE IS HERE
11:40:46.402 -> Message sent to Nano: HEY NODE IS HERE
11:40:49.368 -> Message sent to Nano: HEY NODE IS HERE

And output on Serial monitor of Mini nani:
Message sent to Nano: HEY NODE IS HERE
11:40:34.398 -> Message sent to Nano: HEY NODE IS HERE
11:40:37.403 -> Message sent to Nano: HEY NODE IS HERE
11:40:40.368 -> Message sent to Nano: HEY NODE IS HERE
11:40:43.368 -> Message sent to Nano: HEY NODE IS HERE
11:40:46.402 -> Message sent to Nano: HEY NODE IS HERE

11

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