Arduino Lidar TF MINI Problem (return 0) Seeed

[adbasl]

Hello everyone,

I recently tried to follow the code and assembly instructions provided by the manufacturer for a Lidar sensor, but unfortunately, I am only getting 0 values in return. I am not sure what the issue could be and I am having trouble understanding the problem.

These is the code and the instructions I followed so, in fact with the if condition I have no return.

GitHub - TFmini/TFmini-Arduino: TFmini's Examples on Arduino.

Has anyone experienced a similar issue or have any advice on how to troubleshoot this problem? Any help would be greatly appreciated.

Thank you.

[anon56112670]

Please post your code, in code tags,

like this

Also, tell us more about your sensor.

[jremington]

Please read and follow the instructions in the "How to get the best out of this forum" post.

[adbasl]

Sorry, there is the code

> Blockquote

void getTFminiData(int* distance, int* strength) {
  static char i = 0;
  char j = 0;
  int checksum = 0; 
  static int rx[9];
  if(Serial.available()) {  
    rx[i] = Serial.read();
    if(rx[0] != 0x59) {
      i = 0;
    } else if(i == 1 && rx[1] != 0x59) {
      i = 0;
    } else if(i == 8) {
      for(j = 0; j < 8; j++) {
        checksum += rx[j];
      }
      if(rx[8] == (checksum % 256)) {
        *distance = rx[2] + rx[3] * 256;
        *strength = rx[4] + rx[5] * 256;
      }
      i = 0;
    } else {
      i++;
    } 
  }  
}

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

void loop() {
  int distance = 0;
  int strength = 0;

  getTFminiData(&distance, &strength);
  while(!distance) {
    getTFminiData(&distance, &strength);
    if(distance) {
      Serial.print(distance);
      Serial.print("cm\t");
      Serial.print("strength: ");
      Serial.println(strength);
    }
  }
}

[adbasl]

Thank you sorry.

So I use an Arduino Yun with a Mac Laptop with the IDE arduino 1.8.9
I plugged the 5V and the GND and when I transfer my code to my arduino then i Plug mi TX to my RX on Arduino

[jremington]

It sounds like the sensor and the Arduino are not communicating. But there is not enough information in your posts to guess why.

What does this mean?

then i Plug mi TX to my RX on Arduino

Please post a picture of a hand drawn wiring diagram, with pins and connections clearly labeled, and a photo of your setup.

[adbasl]

There is the picture :

TFmini's TX is plugged on Arduino's RX.

[jremington]

That is a picture of an Arduino Uno, taken from the TFmini library web site.

You claim to have a Arduino Yun, which is a completely different board.

Do not expect valid answers from the forum if you post incorrect information.

[adbasl]

It's the same but if you want there is mine :

TTFmini's TX is plugged on Arduino's RX and
TTFmini's RX is plugged on Arduno's TX.