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Questions tagged [sensors]

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

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20 views

Demux 4052 interface with BC547 BJT and interface with IR sensor [on hold]

I am new to electronics and am trying to make a circuit of IR sensor I want 40 mA current and 5 V at the input of IR sensor but demux 4052 output is not capable of this so I thought to connect BJT ...
0
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1answer
14 views

Quaternion values from BNO055 not available

I am trying to obtain Quaternion values from a BNO055 connected to ESP32-PoE board by Olimex. Code #include <Wire.h> #include <Adafruit_Sensor.h> #include <Adafruit_BNO055.h> #...
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2answers
28 views

Get accelerometer values from BNO055 using adafruit's Unified Sensor Library

If I understand correctly using the Adafruit_Sensor one can extract information from the sensor specific information. These sensors are currently mentioned in the README. I am using the BNO055 for two ...
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0answers
18 views

Sending a continuous real time data stream from arduino to the android smartphone [duplicate]

Is it possible to send live data stream continuously from Arduino to any android smart phone. Basically i just wanted to send gyroscope readings to my cell phone continuously. the the most important ...
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2answers
21 views

Arduino Force sensitive Resistor with an lcd

So we were asked to do something with a force sensitive resistor so naturally i thought of a project which takes the name of the main component which is force and applies it ,mine works by as you ...
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0answers
35 views

What are the specific pins to connect the following : DHT 11, ULTRASONIC SENSOR, ESP8266 and arduino uno? [closed]

I researched a lot on how to connect this devices to each other to get the data from ultrasonic sensor and DHT11. But it wasn't clear on how I will connect the devices on their pins. I found one ...
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1answer
28 views

Reproducing a Fiber Optic Shape Sensor with Arduino?

I want to be able to track the curvature of a human arm as it straightens out and retracts (ex: like live tracking a bicep curl). I don't want to use resistive flex sensors. I've been trying to find ...
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0answers
21 views

Test the RPM readings of servo motor through Wireless Frequency meter [closed]

How can we test the RPM readings of the high power servo motor by fetching the data from wireless frequency meter (trying to interface with Arduino) which actually sense the frequency as well as the ...
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1answer
66 views

How to create a weather station with only GY-BME280-3.3 chip and w5100 Ethernet shield mounted over arduino mega 2560 r3

Want to create a weather station with only GY-BME280-3.3 chip and w5100 Ethernet shield mounted over Arduino mega 2560 r3 but I have no previous experience with Arduino. And The Arduino will be hooked ...
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0answers
35 views

Touch interface for metallic surface [closed]

I just bought a small pocket watch and would like to make it a bit smarter. The device in question is this PocketWatch Diameter is around 45mm, height of 10mm. My plan is to add a battery and a BLE-...
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2answers
56 views

How to Connect ESP8266 with ultrasonic sensor and dht11 without breadboard? [duplicate]

I want to connect the sensors in Esp8266 after I code those using arduino uno r3. The problem is that I don't have the idea on connecting those sensors without breadboard. Thank you
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3answers
63 views

(ultrasonic sensor code : No such file or directory)

I'm beginning in Arduino I do not understand what the error means. Please tell me where I can find the resources to understand it and allow the code to compile. #include <RCSwitch.h> #include &...
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0answers
38 views

Humidity sensor showing weird readings

I am new to arduino and was testing humbidity sensor. when i run the program the its showing humidity = -999 and temp = -999 which is strange. Here is my code:- #include <dht.h> dht DHT; #...
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0answers
26 views

How to make arduino as a client and send the data collected by the arduino to a web server via ESP8266 [duplicate]

I am working on an IOT project where Arduino as a client and send the data collected by the Arduino using Current Sensor ACS712 to a server which is hosted over the internet. Where I can store and ...
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0answers
38 views

Reading data from differential pressure sensor(pitot tube)

I am trying to read data from differential pressure sensor to calculate wind speed using arduino DUE. The sensor that i used is MPXV7002DP. I tried different methods and i didn't handle the right ...
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2answers
74 views

Connecting two Arduinos via I2C while I2C Pins A4/A5 are already in use

I have the following problem: Since the BH1750 Sensor only supports two different I2C adresses, but i need to use 6 of those sensors, i wanna use 3 arduinos, 2 nanos, 1 uno and send the data from the ...
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0answers
3 views

connecting Raspberry pi wireless [migrated]

my question : can a Raspberry pi connect wireless in 3 devices through internet? The 3 devices are far from each other and these devices are sensors(DHT11 & Ultrasonic sensor,with breadboard and ...
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1answer
65 views

IoT gabage monitoring system with my own Android application [closed]

I'm developing a device system in our campus - my aim is to provide three IoT smart garbage containers that will get the fill level (to determine the space of garbage inside and to inform the garbage ...
2
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2answers
52 views

Using two sensors with delay concurrently

I want to use an ultra-sonic sensor and the led concurrently. I want the led to blink every 0.2 seconds and the ultra-sonic to measure distance without regard to the blinking. The problem is I have ...
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0answers
30 views

Dividing 120-degree sweeping motion into two section of 60-degree for SG90

I have a project that requires a sweeping SG90 servo motor between 0 to 120 degrees, integrated with ultrasonic sensor. Between 0 to 120 degrees, I'm required to sound a first buzzer within 0 to 60 ...
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1answer
44 views

Arduino direction sensor

I am working on a school project for next week And I need my Arduino to 'sense' at which direction it is moved is it possible? Are there any direction sensors that 'sense' at which direction the ...
0
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1answer
35 views

Correlated signal from two sensors in one circuit

I have water level/humidity sensor and a LDR diode hooked to arduino like this (the resistor is 10k) On A0 I can read signal from water sensor (blue) On A1 I can read signal from light sensor (yellow)...
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1answer
16 views

end measure process of HX711 with Door Lock magnetic sensor

I'm doing a program that starts the measuring process, using an HX711 when the door lock magnetic sensor spits and, when ends the measuring process when the door lock magnetic sensor joins. if (...
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2answers
21 views

Ping a sensor for error checking

Is it possible to ping a sensor, like DHT22 or 18B20, to check for connection. I want to do an error check in void setup() and make sure all sensors are connected properly.
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1answer
49 views

Vacuum pressure sensor for Arduino

I have an application that is being controlled by an Arduino. At one point in the process, it needs to determine the level of vacuum in a chamber and adjust it to within a range of values. I can ...
0
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1answer
32 views

Trying to use Tap Detection solution using ADXL345 with Arduino

I am using ADXL345 sensor connecting with Arduino via I2C interface, I am able to test the data at tri-axial axis but as there are some other features also, which I am going to try with Tap detection ...
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0answers
22 views

How do I change a continuous servo speed based on the bend of a flex sensor?

The following code just has my servos running all the time nonstop. I want it to stay still until I enter 0 in the serial monitor at which point a program begins that, among other (here irrelevant) ...
1
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1answer
60 views

How do I select Sensor using chip 74HC138 on Wemos D1 Mini?

I have a project for my graduate degree. It's about Monitoring Temperature and Humidity using Message Queuing Telemetry Transport on Serial NodeJS. To get sensor data to Wemos D1 Mini and NodeJS had ...
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0answers
49 views

Looking for a waterproof SPI temperature sensor

In my current project I'm using a DS18B20, which seems to be the only temperature sensor to show up when googling for waterproof temperature sensor for an arduino. The sensor itself is fine, however, ...
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3answers
51 views

Can the Arduino interface with a fingerprint sensor on my mobile?

I own a OnePlus 6 and it has a fingerprint sensor. Instead of using a fingerprint scanner module like the R305, could I just use my mobile for scanning the fingerprints? If yes, how do I implement ...
0
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1answer
25 views

Stabilitiy Problem for Interrupts Code related to Flow sensor

There is a problem with code related in link Interrupts Problem with Flow sensor. Code is working but when I stop the pumps, flow value on lcd is frozen until I reset the arduino. And when I start the ...
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1answer
19 views

FSR wiring using internal pullup resistors?

What are the disadvantages to using Arduino's internal pullups with a force force sensitive resistor (FSR) sensor? All the wiring examples I see for FSRs place the sensor on the high side and use a ...
0
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2answers
42 views

Detecting Ultrasonic sensor malfunction within the arduino sketch [closed]

Is it possible to write code in the sketch that checks the functioning of the ultrasonic sensor? Say if the sensor stopped working then the arduino will alert the user in the serial monitor.
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1answer
112 views

Interfacing with an SSI sensor?

I'm trying to interface with version RM08S of this rotary encoder using an Arduino Mega. The sensor supports a "Synchro serial interface (SSI), single ended" interface. I'm unfamiliar with this ...
0
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1answer
74 views

Run piece of code based on a feature

I am an engineering student completely new at using Arduino so my following question might be silly but still. I do not think you'll need to get the entire code so I am only going to expose the idea. ...
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0answers
39 views

Seemingly free floating and too high voltages

I have connected a moisture sensor, a usual LDR, a BH1750 and 4 DS18B20 sensors to my Adruino MKR GSM 1400. A few days ago everything worked fine when mounting it to a breadboard. But now for some ...
2
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1answer
83 views

Interrupts Problem with Flow sensor

#include <Wire.h> //I2C lib #include <LCD.h> #include <LiquidCrystal_I2C.h> // LCD lib LiquidCrystal_I2C lcd(0x3F, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); const int pot_pin = A0; const ...
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0answers
14 views

Send quaternion values over BLE instead of fusionData.x()

I'm using a 9 axis sensor to determine the angle of rotation (ST LSM9DS1 9-Axis DOF) In the main script the following function is called to get one of the angles, in this example it is the angle with ...
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0answers
44 views

Controlling servo motors with Takktile sensors

I'm currently working on a project, and I was wondering if I can control two servo motors with the feedback from Takktile sensors (by only the pressure feedback). Since I'm quite a newbie in this area,...
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0answers
66 views

Why pulse sensor give high bpm?

I make project to detect bpm with pulse sensor, I try use sample code from Pulse Sensor Playground Getting Bpm to Monitor. this is the code : #define USE_ARDUINO_INTERRUPTS true #include <...
1
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1answer
37 views

Arduino sensing its 'Motion'

I am working on a project where I need the Arduino to 'sense' at what direction its moving. For example, I want the Arduino to 'sense' that it is moving towards 'forward' direction, 'backwards' ...
0
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1answer
32 views

Caluclate lux value from LDR

I am using an LDR (Iduino SE012) to measure light. It returns a 10-bit value of the incoming voltage and I don't know how to convert this into lux, lumen candela or any other light-intensity unit. I ...
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1answer
84 views

How to detect water presence with only 2 wires

I don't know if this question belong here or on electronics SE. A manufacturer just sent me a personalize device which include an ESP-32 and a Water Sensor. My problem is that I don't know how to ...
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1answer
38 views

I can't manage to upload multiple sketches [closed]

I'm doing a gardening project. It involves multiple sensors and even having the sketches for them, I don't know how to make them run together and get a reading on them at the same time. I'm really new ...
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1answer
65 views

DHT11 Sensor : Stand-by or Shut down?

I have an ATmega328P monitoring room temperature and humidity. It is enough for me to monitor every 8 seconds. In these 8 seconds, I am putting my Atmega to sleep. Now , I want to know : Does ...
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0answers
19 views

TM1637 is showing error [duplicate]

When I try to use the 4-digit display TM1637 with the relevant library on an arduino UNO board this error message keeps popping up.Please help me trouble shoot what is wrong with this device ? the ...
0
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1answer
27 views

How to properly link an Arduino and its sensors [closed]

To finalize a prototype, I would like to have a proper structure containing the arduino (uno here), its shields and its sensors. I would like the sensors to be soldered to the arduino+shields block, ...
1
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1answer
53 views

How to get PPM value from MQ-3?

I tried to build project to detect alcohol with Arduino Uno and an MQ-3 Alcohol sensor. I already have the R0 value, but I faced problem here: I don't know how to convert it to PPM or BAC. I already ...
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1answer
133 views

hx711 and load cell read out 0 for calibration

I'm using this tutorial from Sparkfun https://learn.sparkfun.com/tutorials/load-cell-amplifier-hx711-breakout-hookup-guide And using THEIR code. The only difference is I added a delay so it wouldn't ...
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3answers
63 views

How to filter or eliminate earths magnetic field readings around 3D Magnetic sensor?

Im using the SparkFun MAG3110 3D sensor: https://www.sparkfun.com/products/12670 My application is essentially to make a contactless "magnetic joystick" using a local magnet for accurate and constant ...