Use this tag for questions about selecting, connecting, using, and debugging sensors.
0
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1answer
13 views
how to interface WCS2750 with aurdrino to make an automatic feeder for a masala chakki (MILL)?
it senses the current and rotates the shaft of a auger dispenser (like used in a cat feeder) using a servo motor to make it fully automatic and efficient.
and turn off the motor when there is no load ...
0
votes
1answer
10 views
MPU9250 - Calibration Not Saved with RTIMULib EEPROM Issues
I'm using the MPU9250 and the RTIMULib to perform sensor fusion, however, when I run ArduinoMagCal, and save the calibration, and follow that with running the main ArduinoIMU it claims the calibration ...
1
vote
1answer
25 views
Distance finder technology 0-24inches
Can anyone point me towards whats best for relatively low cost distance measuring in the 0-36" range (or 0 - 1m range) with 1/16"/1mm accuracy. My initial approach was going to be to hack a laser ...
0
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0answers
10 views
Can the BNO055 sensor detect orientation while shaking?
If I'm shaking my BNO055 sensor while detecting the orientation will the orientation value be right?
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0answers
7 views
Similar to the BNO055 sensor?
I kept searching for the BNO055 sensor in my country. Unfortunately, I didn't find it, and I don't want to pay additional shipping fees. Is there something similar that I can use the adafruit ...
0
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0answers
34 views
Getting coordinates of object relative to an origin?
I have an object called A. Object A is going to be 4 meters far away from my Arduino board at max. I want to get the position and rotation of this object on the three axis relative to the Arduino ...
-4
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0answers
42 views
why wont my sketch work? [on hold]
#define CONSERVATIVE
int ioPin = 3;
#define BUFSIZE 200
unsigned char buf[BUFSIZE];
#define pullLow() pinMode(ioPin, OUTPUT)
#define pullHigh() pinMode(ioPin, INPUT)
unsigned char dbits[] = { 0, 0, ...
0
votes
1answer
37 views
Detect movements of a person? [on hold]
I'm working on a Virtual Reality game. I want to detect the position or movement of most of the bones in the human body(e.g. Knees, elbows, shoulders, hands and legs). This person may wear special ...
0
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0answers
26 views
Determine Object Heading
Is there a sensor I could use which would let me know which direction an object is heading/facing? i.e. I have a servo that can rotate 0 to 180 degrees, and I have another sensor on a block. When I ...
1
vote
2answers
33 views
Calculate time between 2 data of a sensor
I'm working on a project in my university and I'm having a trouble in calculate time. I have a conveyor and an IR sensor which I use to calculate the maximum and minimum distances of a box when it is ...
0
votes
0answers
32 views
Detecting different objects with arduino
I have three wooden cubes and a surface that fits one cube. I want to be able to detect which cube is placed on the surface at any given time. The cubes are all of same size ant the method can't rely ...
0
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0answers
10 views
Implementing tilt compensation for a 3-axis magnetometer
I'm really stuck trying do implement a tilt compensated compass on the basis of a 3-axis-magnetometer (HMC5833L) and the Arduino 101 which has a builtin IMU (acc and gyro).
The sensors sample at 100 ...
0
votes
1answer
11 views
serial.write() five sensors and Processing
To all of this, hope to formulate the question right.
In my project I have 5 sensors connected to Arduino, which I want to interpret via Seria.write() --> Processing.
Arduino:
firstSens = 100 + (...
0
votes
0answers
40 views
Making someone walk in place? [closed]
I know this seems to be a dumb question, but I'm working on a serious project and I really need help. I'm working on a virtual reality First-Person-Shooter game (yes I came from stack overflow). The ...
1
vote
1answer
18 views
Wired IoT sensor network with PoE?
Objective: Maybe I'm a bad Googler, but I am finding very little on wired Internet of Things sensor networks using Arduino.
Project Goals:
Arduino based sensor nodes that connect to the local ...
0
votes
2answers
30 views
I2C multi sensors reading on Arduino
I have several sensors (Grove multichannel gas sensor, Air Pressure Sensor MPX4115A, Temperature and Humidity Sensor DHT11) where most of them uses I2C communication.
I wonder if it is possible to ...
0
votes
2answers
18 views
Gas Sensors with Arduino + Interfacing Circuit
I am intended to use Gas Sensors (MQ series) on protoboard so I connect it to Arduino and perform analogue read.
I would like to request if possible to get the interfacing circuit (resistors, ...
1
vote
0answers
27 views
Attempting to use 3 BNO055 sensors via Arduino Mega 2560
I am working on a project that uses data taken from 3 separate BNO055 sensors and transmits it to an Arduino Mega 2560. I only have a basic knowledge of the code, and am having trouble figuring out ...
0
votes
1answer
14 views
Deploy data online from SD Card on Arduino
I intend to design an air pollution monitoring station which will measure these data (CO, NO2, O3, Temperature, Humidity and Pressure). I want to store the data on the SD card during the whole day and ...
0
votes
1answer
38 views
counting ADC samples ( using a light sensor)
i am new to micro controller programming and in need of help. i have managed to interface a light sensor to a micro controller (atmega 32a) and can read the value i.e. (1023) as per the set prescale. ...
0
votes
2answers
18 views
MPU6050 acceleration values not 16-bit?
I'm looking at the little code snippet from this (many other projects also use similar code):
void loop(){
mpu.getMotion6(&ax, &ay, &az, &gx, &gy, &gz);
ax = map(ax, -17000,...
0
votes
1answer
23 views
Senda Data using Arduino GSM shield get/post/put?
Hi i try to modifiy arduino gsm library Xively example to geeknesia.com
the serial said "successconnecting.." but i didn't get any value change in the website. Do i make mistake with this code?
//...
0
votes
1answer
53 views
How to modulate my IR sensor?
I'm looking to use a simple IR sensor out in bright sunlight, which means hell lot of distortion. Is there any way I can modulate it using my Arduino UNO so that it isn't affected by sunlight and ...
0
votes
1answer
12 views
Moisture sensor data will not output data to Serial Monitor?
I am making a Soil Analysis system with an Arduino Uno, but I have run into a problem and was wondering if /r/learnprogramming could help!
The moisture sensor section of my code will not output the ...
0
votes
1answer
34 views
Looking for a wireless soil moisture sensor
I am new to arduino and have a basic question. I want to build a sprinkler controller system for my lawn which would detect moisture in the lawn soil and automatically starts the sprinkler controller ...
0
votes
1answer
25 views
Question about number of sensors for Arduino Mega
What is a good max number of sensors for an Arduino Mega? Since it has like -- 2? -- ground connections, is it better to keep the number of sensors to a minimum amount?
0
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1answer
61 views
Range of Offset Value in pH sensor module?
In finding the pH value of a liquid/Soil, what is the range of Offset voltage value that I can use in my code?
Using / calibrating pH sensor module
I considered the above link as a reference. But I ...
0
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0answers
21 views
Are there any online data analysis websites for arduino IoT projects?
I am planning on making a system where multiple arduinos monitor the conditions of certain type of plant. (Each arduino monitors its own plant, but the plants are of the same species). Each plant ...
1
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0answers
35 views
upload real time ultrasonic sensor data to pubnub using arduino and esp8266
I want to upload the real time data of ultrasonic sensor attached to my arduino uno and i have been using esp8266 module for the WiFi connection. I want to upload to pubnub but i dont know how to ...
0
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0answers
20 views
Sensor yields random readings when powered with battery but works perfectly with USB
I have noticed this strange behavior , whenever i power the sensor with battery it throws some random readings but when powered with 5V Arduino Pin (when arduino is powered with USB or power adapter/...
-3
votes
1answer
40 views
Best Actuator to Behavioural Positive/Negative Feedback on Cat
Rhetorical, yet silly question: Given an Arduino to manage, what would be the easiest way, in terms of available actuators (price/availability counts) to:
a) Apply a positive feedback to a cat, in ...
0
votes
1answer
18 views
Different sensor readings on analog input when connected via USB to self-contained/externally powered
I am building up an electricity monitor using the ACS712 hall effect sensor. I have tested and built the circuit having the Arduino (Nano) connected via USB to my laptop, and have tested/debugged etc....
0
votes
1answer
114 views
BMP280 sensor not initializing
I am successfully used the BMP280 sensor via SPI connection with an Arduino Uno R3 board. Trying to run the same code with the same setup on an Arduino Ethernet however has produced the problem that ...
0
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0answers
138 views
How to calibrate a load cell?
I'm working with a load cell and HX711. There was no weight on the sensor but I kept getting strange values, I thought it was broken or something so I used my second load cell but the same thing ...
0
votes
1answer
38 views
IR sensor does not work well on carpets
I have facing a problem since long and cannot solve it. I built Arduino car and place 2 IR sensors shown in image, to check down distance to avoid falling from stairs. One is at back and other at ...
-1
votes
1answer
40 views
Ways to implement touch sensitive surface?
I'm building a tic tac toe board for my kids where tapping on a plexiglass surface in any one of the 9 squares would light it up.
What are some ways I can pull off making each of those 9 squares ...
-2
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1answer
27 views
Compilation fails with non-explicit error message
I have written the following code for a project comprising an ultrasonic
distance sensor, a buzzer and a few buttons. When the distance is less
than 60 cm, the buzzer rings and stops only when ...
0
votes
1answer
31 views
Gesture sensing TV coffee table - what sensors would you use?
A 32 inch flat screen was embedded in a coffee table and covered by a protective layer of glass. Sensors around the edge of the glass surface need to be able to detect the precise location of an ...
0
votes
1answer
32 views
Use Distance Sensor to Trigger LED strip and Stay on While the Person Is in Range
I'm trying to use the distance sensor to trigger the IED light, as you can see below. However, I also want the LED to stay on/white when a person is within the 38 inches range. How should I do that?
...
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0answers
45 views
PIR sensor and sleep (interrupt) on Mega2560
So I was starting to gain some knowledge on the PIR sensor and how to let the arduino 'sleep' while there is no movement detected by the PIR.
So I found the following code somewhere and looked fairly ...
1
vote
0answers
41 views
Erratic readings on Analogread with low voltages
I am using Arduino Uno for measuring sensor voltages. I am using multiplexor to switch between different sensors. The readings measured in the range of 800- 900 mv are accurate, but at low millivolts (...
0
votes
0answers
27 views
Is it possible to sense 220V AC current using a reed switch?
I have a light switch in the room and also a relay connected to Arduino (Multi-way switching). I can turn on and off the light from both places. But there is a problem - the Arduino doesn't know about ...
0
votes
1answer
210 views
BMP280 returns 0
I have connected a BMP280 temperature/pressure sensor to an Arduino Uno just like here:
and used the example code provided by the Adafruit BMP280 library. However, the values for temperature and ...
0
votes
1answer
81 views
Converting RGB from color sensor into the Munsell Color System
I am hoping I could get some help developing a an idea I have for archaeologists/soil scientists using an arduino and the TCS3200 colour sensor. The idea I have is a simple device which can determine ...
1
vote
1answer
38 views
Arduino uno IR Sensor Array [closed]
I am a beginner.I can't understand how can i get the reading of IR sensors(6) in a function.I use a home-made sensor.so,i have no built in library.
3
votes
1answer
60 views
Can't retrieve data from X-NUCLEO-IKS01A1 using I2C protocol
So I bought this nucleo expansion board, the X-NUCLEO-IKS01A1, and on the package it says it is compatible with Arduino Uno.
My goal here is to read data from any sensor on this board. (When I can ...
2
votes
1answer
52 views
Sampling frequency
I am an undergraduate student at a public university in Maryland. I am currently doing a project with an arduino and I came across a problem that I could not figure out after several days of ...
0
votes
1answer
33 views
FlySky TH9X with Arduino: cant get pulseIn() function to return sensible values for any channel
So I've got a FlySky TH9X and I'm trying to read some pulses using an Arduino Uno.
I'm just starting out so I want to get the hang of using the pulseIn function before moving onto interrupts. My ...
1
vote
2answers
77 views
SDS011 Dust Sensor Checksum Error
I'm working with an SDS011 particular sensor through its serial interface. The spec sheet (http://inovafitness.com/upload/file/20150311/14261262164716.pdf) indicates that the second to last byte of a ...
-1
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1answer
32 views
Arduino capacitive touch sensor help
So I have been messing around with the Arduino Capsense library with the immensely helpful guide; http://www.instructables.com/id/How-To-Use-Touch-Sensors-With-Arduino/ (many thanks to DangerousTim!) ...
