EnviroDIY

2020-08-05 at 10:19 AM #14449

Participant

Hello,

I’m sorry to dig up this old post but it seems the right place to post. Tell me if it’s better to create a new post.
So here’s my problem :

I plugged the MB7363 Sonar sensor from Maxbotix to the Seeeduino Stalker v3.1 . I used the analog pin of the sonar (pin 3) and I connected it to the analog A1 input of the Seeeduino Stalker, Vpin to the 3,3v and GndPin to the GND pin, as you can see in the following picture :

I also added a 4LED display to show the value of the sonar from the analog input, again, as shown on the picture.

Everything work fine this way, but when I want to remove the LED display, the value of the analog input coming from the sonar drops to 0. If I reconnect the LED display, correct value from the sonar start being read again. Thing is that I use the LED display as debug and I need to remove it at the end to put this setting (Seeeduino Stalker connected to a battery) in a closed box. Leaving the LED display will use too much power.
So, is there anyone here that have any idea about what is going on here and how can I make it work without the LED display ?
Why is my readings on 0 when I have only my Maxbotix Sonar connected ? I tested the same code with the same setup on Arduino Mega and it works fine (with or without the 4LED display)..

Here’s the code I used :

// include 4LED library /////////////
#include <TM1637Display.h>

// Variables 4LED //////////////////////////////////////////////
const int CLK = 3; //Set the CLK pin connection to the display
const int DIO = 9; //Set the DIO pin connection to the display

TM1637Display display(CLK, DIO); //set up the 4-Digit Display.
////////////////////////////////////////////////////////////////

//Set the Maxbotix pin to receive the signal.
const int anPin = 1;

long pulse;

void setup()
{
/// 4LED Setup //////////////////////////////////////////////////////
display.setBrightness(0x0a); //set the diplay to maximum brightness

//Open up a serial connection
Serial.begin(9600);
}

//Main loop where the action takes place
void loop()
{
pulse = analogRead(anPin);

Serial.print("The value is: ");
Serial.print(pulse);
display.showNumberDec(pulse);
Serial.println();

delay(500);
//////////////////////////////////////////////////////////////////////
}

// include 4LED library /////////////

#include <TM1637Display.h>

// Variables 4LED //////////////////////////////////////////////

const int CLK = 3; //Set the CLK pin connection to the display

const int DIO = 9; //Set the DIO pin connection to the display

TM1637Display display(CLK, DIO); //set up the 4-Digit Display.

////////////////////////////////////////////////////////////////

//Set the Maxbotix pin to receive the signal.

const int anPin = 1;

long pulse;

void setup()

{

/// 4LED Setup //////////////////////////////////////////////////////

display.setBrightness(0x0a); //set the diplay to maximum brightness

//Open up a serial connection

Serial.begin(9600);

}

//Main loop where the action takes place

void loop()

{

pulse = analogRead(anPin);

Serial.print("The value is: ");

Serial.print(pulse);

display.showNumberDec(pulse);

Serial.println();

delay(500);

//////////////////////////////////////////////////////////////////////

}