Questions tagged [sensors]

Use this tag for questions about selecting, connecting, using, and debugging sensors.

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20 views

MAX30100 not working

I am unable to get the MAX30100 sensor to work It keeps throwing the following error: 16:06:32.936 -> Initializing... 16:06:32.936 -> MAX30105 was not found. Please check wiring/power. I am ...
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0answers
23 views

Two sensors on same ESP-32 board

Need some help on the project I'm currently developing. I have 3 YF-B2 sensors that I need to connect to the same ESP-32 board and read the data from the sensors and send it via MQTT. I had it working ...
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1answer
46 views

Noise in Analog Read Serial from an instrumentation amplifier(ina122p)

I am trying to read the values from a simple EMG circuit (with an INA122P) using the analogRead() and plotting in the plotter using an Arduino nano v3. I am powering the ina1222p from the 5v pin of ...
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1answer
49 views

how to ignore a sensor being tripped the first time and start recording millis on the 2nd time it is tripped

I am building a timing system that has a start, split and finish beams with this I am using a start gate that will drop when the race starts. when it drops it will trip the 1st sensor starting to ...
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0answers
30 views

Equipment wireless stopwatch

I am working in a project in order to measure spend time. My sitution is: There is a competitor that will start the game after he (or she) heard a sound (could be a sound like buzz or whistle). This ...
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0answers
55 views

How do I connect an MPU6050 sensor to an Arduino MKR WIFI 1010?

I've been trying to connect an MPU6050 to my MKR WIFI 1010 following these general instructions and using the I2CDev library, but I keep running into problems. For a while the Arduino just didn't show ...
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0answers
36 views

How could I combine sensor data with custom protocol und send it with Serial?

I am very new to Arduino. Now I am trying to send the sensor data to Computer. The sensor data will be stored as bytes into arrays. To build a robust transmission I'll pack the data with own defined ...
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0answers
13 views

How to combine this two sensor code [duplicate]

I have a problem. I don’t know how to combine this two codes & the diagram. My project is about automatic water storage door that using water sensor & rain sensor. The rain sensor will ...
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0answers
18 views

I have three load cells can I sum all the three into Arduino to be one output? If yes how?

I am doing stand thrust and I have three load cells to measure the force. I would like to know if I can sum them to gather into the Arduino or I should use a junction box.
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0answers
24 views

Serial Monitor Not Displaying

I am using BMP 280 for an altimeter to measure the altitude. Once all connected and uploaded the BMP280test code from Adafruit, the serial monitor says busy. But still, when I switch the port in tools,...
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2answers
44 views

Is an Ultrasonic Sensor or Infrared Sensor better for measuring distance (to/from a human body)?

I'm trying to make a sensor to detect that a person is within 50cm to trigger a function. But when I use the HR-SR04 sensor, it works accurately on flat surfaces (e.g. walls, books) with a margin of ...
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1answer
44 views

Measuring car speed between two points: What sensor to use and how to cover the distance?

PROBLEM Cars regularly exceed the speed limit in our street SOLUTION Measure each car's speed and clearly display the speed to the driver EXECUTION Measure the time the car takes to cover a set ...
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0answers
33 views

communication between two ultrasonic sensors on different arduino uno

I am making a project which requires two ultrasonic sensors(HCSR04) connected to different Arduino Unos to communicate with each other. By communication I mean, one sensor should just detect that ...
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1answer
45 views

Arduino nano 33 ble vs ble sense. Power consumption, etc

After working with an Arduino Uno at work, I am looking to buy myself a board for some projects/experiments at home. The nano size seems like a great option, especially the one without soldered ...
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0answers
32 views

Which sensors to use? [closed]

I am making smart highway project and its like there is two checkpoint and car must be register data on device and add timer on it and at checkpoint2 it should delete data My questions is which ...
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0answers
17 views

Arduino and ZMPT101B But Not Stable Sigma Output In 7segment Display(TM1637) using filter library

#include <Arduino.h> #include <math.h> //TRUE RMS START #include <Filters.h> //Easy library to do the calculations #include <TM1637Display.h> float testFrequency = 100; ...
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1answer
48 views

Heart Pulse sensor analog value doesn't change even if sensor pressed by finger

I have recently bought a Heart Pulse Sensor. Then, to check whether the sensor is working correctly or not, I uploaded this below code: void setup() { Serial.begin(9600); } void loop() { int ...
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3answers
72 views

Better way for connecting to Arduino pins to a sensor than jumper cable

Well I have an dht21 and arduino mega. Dht21 leads look like this If I use jumper cable and soldering dht21 leads with jumper cable than plug-in my arduino's socket. it looks like this below image. ...
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1answer
44 views

How can i develop a fish tank automation using arduino [closed]

As a part of my final year Engineering project I would like to develop a fish tank automation system. In my project I need to check the quality of water concurrently and also I need to check the ...
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2answers
82 views

Detecting different objects closeness

iam currently working on a new project, where i would like to detect the existence/closeness of several objects around the arduino up to like 1 meter. I was thinking about an rfid setup, but as the ...
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0answers
76 views

Reading TCD1304 linear CCD Sensor

I want to read the TCD1304 linear CCD sensor with an ESP32 and I'm facing some problems. As a first "warm-up" and to get familiar with this sensor I tried to generate the sensors input ...
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1answer
29 views

Connecting BMP280 sensor to microcontroller

I am building my own board with integrated pressure sensor. (microcontroller is 3V3 logic) I want to know which parts do i need. In datasheet there are only 2 capacitors but on breakout board there ...
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0answers
19 views

Ultrasonic sensors not working

The target of this is for the system to print "Done" when distance, measured by 2 ultrasonic sensor, is between 6-17 cm. This is my python code: import serial arduinoSerialData = serial....
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1answer
42 views

What sensors do I need to detect magnetic “take off”?

I want to build a sensor using arduino (or any other esp) measuring the release of a leg on a floor panel. I've build a prototype using copper plates and a BBC Micro:bit, which works fairly well. But ...
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2answers
70 views

Why do we use HX711 with load cell (Why do we need A to D conversion)?

We generally amplify the signal from load cell but why there is need for A to D (analog to digital) conversion?
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0answers
22 views

How to Adjust MQ131 Sensor?

The problem Hey. I'm trying to use the sensor Mq131 to measure some ozone data in a closed environment, but I'm having some bad time to adjust the trim in the sensor and get results in ppb. By ...
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2answers
51 views

Sea level pressure for BMP280

I have a BMP280 and BMP180 pressure sensor and I have both of them connected via I²C to a ESP8266. For the BMP180, I can get the sea level air pressure when I pass the pressure and altitude like so: //...
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0answers
16 views

Ultrasonic Sensor and Motor Driver Shield [duplicate]

im new to arduino and am making an arduino car. the motor driver shield covers the ports (am connecting an ultrasonic sensor) and i know that we can connect it to the 'holes' on the motor driver ...
0
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1answer
24 views

Why delay of more than 64 millisecond stops the servo motor from rotating? I am not using “Servo.h” instead i am just managing the length of pulse

The code I used was this int servo = 5; int angle; void setup() { pinMode(servo, OUTPUT); } void loop() { for (angle = 0;angle<180;angle++){ digitalWrite(servo, HIGH); ...
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0answers
22 views

Problem with interfacing Cirus OS1 oxygen sensor with Arduio Uno

I am trying to interface Arduino UNO with Cirus OS1 oxygen sensor but not able to get the expected output. The expected voltage output of OS1 sensor is 9-13mV and the oxygen % is expected to be in the ...
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1answer
60 views

How do I generate a graph from Arduino sensor data?

I used a DHT 11 sensor with an Arduino Uno to measure temperature and humidity. I used the following code to print the temperature and relative humidity in Serial Monitor. dht DHT; #define DHT11_PIN ...
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0answers
33 views

Calculating the Distance between a Special Object and Center

I just want to detect a small object specified in the system and show the distance between it and the object. If I need to explain briefly; I want to detect a small object that I put on the foot of a ...
0
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1answer
36 views

ESP8266 NodeMCU 3v3 current for fingerprint sensor

From what i see that 3.3Vpin provide 3.3V and 400mA. The fingerprint module i use is AS608. Connecting the fingerprint module power pin to 3.3V of the nodemcu. From the datasheet it only can handle 3....
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2answers
55 views

How to convert RGB values to Intensity

I made an arduino color sensor with tcs3200 and arduino uno. I have coded the arduino to find the RGB values when I place the color paper below the sensor. How can I derive the intensity using the RGB ...
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1answer
47 views

Problem on interfacing 3 flame sensors and servo to Arduino Fire Fighter

I had been trying to make Arduino Fire Fighter Robot but facing several problems in interfacing 3 flame sensors and servo together. When I upload the following code( Which I had posted at the end of ...
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0answers
30 views

Fail getting readings from Radar sensor HW-MS03

I try to work with a new sensor - HW-MS03 v.06 sensor. Connecting it pin to pin (v+ to 5v, Sig to digital-input, and GND to GND ), both to Arduino Uno and ESP8266 Wemos mini, and got same results: ...
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1answer
48 views

Vibration pattern matching [closed]

I would like to generate vibration patterns using the SW-420 or something similar that is able to reproduce the same pattern on similar vibrations. So if a 10p coin was dropped on a table from 1m at a ...
0
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1answer
54 views

A sensor to recognize my pet near me [closed]

Need a specific sensor that will detect when a pet comes close in a range of distance. As it comes close a beep intimates that the pet has reached. What sensor will work here. Can it work with an ...
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0answers
39 views

Calculating fluid volume using arduino sensors

I would like to measure liquid sealant volume inside bike tires, using sensor located between rim beads. I guess it would by possible, by using ToF sensor, that would measure distance between rim and ...
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1answer
30 views

Using HC-SRO4 sensor and looking for obstacle

I am working in TinkerCAD, I want to design and simulate a circuit in which there are following components: 1.)An Arduino board. 2.)A potentiometer 3.)An HC-SRO4 sensor 4.)An LED. So, the sensor ...
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1answer
24 views

Stopping a motor after a given time period [duplicate]

I have a code to turn on a LED when IR Proximity sensor having a object less than 6cm in front of it, and the LED goes down after it is removed. Now, I want the LED to run for 3 seconds only, even if ...
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0answers
41 views

Output of mlx90614 to mcufriend tft/lcd, not getting displayed

Newbie here !! Im trying to display the output of my MLX90614 sensor on mcufriend tft display (with arduino UNO). But unable to do so. I can only see the TFT being lit to white color, text -> "Target" ...
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0answers
34 views

Detecting a finger snap(basically trying to replicate infinity gauntlet)

I am trying to make an infinity gauntlet. So it's obvious it should have a snap feature(which will switch of a light,motor or whatever). But I don't know how to go about sense this snap. I thought of ...
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2answers
70 views

LSM303 unable to compensate tilt

I am working on a tilt compensated compass with the LSM303DLHC. I manage to calibrate the magnetic and accelero part. I managed to calculate pitch and roll. But when it comes to calculate tilt ...
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1answer
44 views

Need help with using pulseInLong to time a sensor

I have a setup consisting of a magnet suspended above a sensor coil. It acts as a pendulum and creates a ~ 4 mV signal when it swings over the coil - this goes through two stages of an LM358 to ...
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1answer
29 views

How to use DO pin on ldr module?

I have ldr module with 4 pins 1. Vin 2. Gnd 3. AO 4. DO I want to know how can i take advantage of DO suppose i want to turn on lcd display when light falls on the ldr sensor! I have noticed ...
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0answers
17 views

ESP8266 & 2x VL53L0X Sensors cause WDT resets

I have a system that utilises 2 VL53L0X sensors. This works fine for the majority of time, but after around 20 hours till 2 days (varying), the ESP resets due to Software a WDT, I've managed to do a ...
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1answer
39 views

How to find the time of any point on the graph on an Arduino serial plotter or Processing software?

I am plotting the graph of some sensor values on my Arduino serial plotter which looks something like this - But what I want to do is hover over any point on the graph and display the time at that ...
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0answers
19 views

Arduino multiple sensor lib combine [duplicate]

I'm new to arduino. How can i combine these codes? Thx. (I'm using Uno) #include "DFRobot_BNO055.h" #include "Wire.h" typedef DFRobot_BNO055_IIC BNO; // ******** use abbreviations instead of ...
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0answers
30 views

Read the respiration data to Arduino serial console

Currently working with ADS1292rShield library. Is there any way to read the value of the respiration and heart rate without using the Protocentral GUI. Printing DataPacketHeader to the console just ...

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