Hc05 Bluetooth communication got 2 second delay

Using Arduino Project Guidance
1

Hi All

I havent touch arduino for ages but im back at it again, giving me problems :rofl:, i got two arduinos, got 64 inputs on one arduino so my data to send will be from 1 to 64 bytes?, and then 64 outputs on the other arduino, anyway im just on breadboard now testing the hc 05 module when i serial write a 1 the other arduino takes about 2 seconds to respond, ive never really work with serial or bluetooth so not sure what the right way is to code it?

Please any help?

Thanks

int state = 0;
const int ledPin = 6;
const int buttonPin = 13;
int buttonState = 1;

void setup() 
{
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT);
  digitalWrite(ledPin, LOW);
  pinMode(buttonPin, INPUT);
  digitalWrite(buttonPin, HIGH);
}

void loop()
{

 buttonState = digitalRead(buttonPin);
 
 if (buttonState == LOW)
 {
  Serial.write('1');
  digitalWrite(ledPin, HIGH);
 }
 else
 {
  Serial.write('0');
  digitalWrite(ledPin, LOW);
 }
delay(10); 
}
``

int incomingByte = 0; // for incoming serial data
const int led = 4;

void setup() {
Serial.begin(115200); // opens serial port, sets data rate to 9600 bps
pinMode(led, OUTPUT);
digitalWrite(led, LOW);
}

void loop() {
// reply only when you receive data:
if (Serial.available() > 0) {
// read the incoming byte:
incomingByte = Serial.read();
}
//Serial.print(incomingByte);
if (incomingByte == '1')
{
digitalWrite(led, HIGH); // LED ON
}
else if (incomingByte == '0')
{
digitalWrite(led, LOW); // LED ON
}
delay(10);
}

2

You're sending furiously.
(And you should use Software Serial.)

Compose your loop() to send a '1', delay(1000), send a '0', delay(1000)
or delay(500),
See how that goes (no pushbutton stuff for now).

3

Try INPUT_PULLUP instead and wire the button between buttonPin and GND. A pressed button give a low in reading it.

4

Hey, how about reading the instructions then? :thinking:

5

No, 64 bits or 8 bytes.

Bluetooth has some latency (delay) in transmission. You just have to live with it.

6

Clearly not true.
Have you actually configured Bluetooth to operate at 115200?

7

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