Questions tagged [sensors]

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

Filter by
Sorted by
Tagged with
-1
votes
0answers
13 views

Multiple GY87 with TCA9548A

I'm using a multiplexer TCA9548A to connect 2 gy87. However, when I show out the result of magnetometer, only 1 reading is correct. Another reading is wrong. I confirm that I had change the bus of ...
0
votes
1answer
33 views

Connecting MPU6050 to Arduino Lilypad

To preface, I am very new to Arduino and I watched this video on YouTube. It shows how you can build a motion controlled car with Arduino and I decided to make this for my school project. One thing ...
0
votes
1answer
22 views

Sparkfun CCS811 Air Quality Sensor is just not workin

i have an Arduino uno board and a sparkfun ccs811 sensor. I tried to reproduce the howto from the sparkfun homepage (https://learn.sparkfun.com/tutorials/ccs811-air-quality-breakout-hookup-guide?_ga=2....
0
votes
3answers
82 views

pin going high not allowing analog read to change

I have the following problem: My arduino takes analogRead(A0) from a potentiometer whose position I can't adjust directly. When analogRead(AO) goes to a value X, I want pin 8 to go HIGH, this ...
0
votes
1answer
30 views

How can I receive signal from remote control using tcrt5000 sensor module

how can I use tcrt5000 sensor module instead of TSOP31238 (TSOP1738) IR receiver to get signal from remote control? I want to create remote control for my PC to navigate through my slide shows. Thanks ...
-1
votes
0answers
24 views

JSN-SRT 2.0 Ultrasonic Sensor

I ran into problems with my ultrasonic sensor. Normally, when I connect the pins(5V,ECHO, TRIGGER, GND) on the ultrasonic to my arduino uno, a red led that does not blink turns on. Now when I power ...
0
votes
0answers
20 views

sensor data transmission with LoRa or NRFL04? [closed]

i have few question.I want to send sensors data of soil humidity and temperature from my garden to home distance is 4.5km. idea is to collect that data from multiple sensor to central system and then ...
0
votes
0answers
19 views

How to calibrate an inclined MPU 6050 on Arduino?

I'm trying to use the MPU 6050 sensor (gyroscope + accelerometer) with my Arduino UNO to get some data when walking, running and making some other moves while carrying it. The problem is that my ...
0
votes
0answers
25 views

HC-SRO4 always returns zero no matter what I do?

Wondering if it's the sensor or the code? can anyone help? I've used the code here /* HC-SR04 Ultrasonic Sensor with LCD dispaly HC-SR04 Ultrasonic Sensor VCC to Arduino 5V GND to Arduino GND ...
0
votes
1answer
54 views

Can you connect BH1790GLC and TMP117 sensors to an Arduino board?

I would like to use those two components for an upcoming project : BH1790GLC heart rate sensor TMP117 temperature sensor I especially like the fact that they’re so tiny. Could I connect them ...
1
vote
1answer
66 views

I want to print onto serial monitor when it's detected the value change

This code is measuring distance from object by using the Ultrasonic Sensor and print onto serial monitor. However, serial monitor constantly output values. I want to print only one time if detected ...
0
votes
1answer
43 views

What sensors to measure grass growth? [closed]

I would like to make a small project, which would allow me to recognize if the grass has grow enough to lawn. I don't know too much the ecosystem of available sensors for such problem. And I have a ...
0
votes
2answers
43 views

Which sensors to choose to detect movement direction

So I'm planning to build a sort of light switch for my Philips Hue bulbs with an Arduino. This project will be mounted on a shelf next to my door to the room, parallel to the walking direction. In ...
0
votes
1answer
53 views

Ultrasonic Sensor - JSN-SR04T 2.0

I would like to use the JSN-SR04T 2.0 in order to find the depth of a body of water. Once I test the sensor in a body of water, the distance measurements are then constant at about 20 cm. I then ...
0
votes
0answers
21 views

Check if the fingerprint exists and enroll with it? Adafruit_Fingerprint.h

I need to verify a fingerprint before being registered, but I have to put the finger 3 times on the finger sensor, which I prefer to do it just twice. The verification is ok, but I don't understand ...
0
votes
1answer
37 views

Can Chirp Waves be sent using JSN-SR04T? [closed]

So i have project for underwater rangefinding using JSN-SR04T. I've read on the datasheet that the module sends square waves. Is it possible to program it so that it sends Chirp waves instead ? (Help ...
0
votes
0answers
29 views

Getting Heart Rate (BPM) from pulse sensor Arduino

I am new to arduino and trying to display the heart rate (BPM) using Pulse sensor. I have found a code from internet that calculates the heart rate: #include <Wire.h> #include <LiquidCrystal....
0
votes
1answer
27 views

MKR GPS Shield Sampling Frequency

I have the MKR 1010 and am working on a circuit that needs realtime GPS positioning. I bought the MKR GPS Shield, and am using it on the I2C bus (attached via cable to the 1010 board), and am using ...
0
votes
2answers
40 views

Why can't I control speed of the motor? (M1 and E1)

When myservo_1,myservo_2,myservo_3,myservo_4 is commented, I can't control the speed of my M1 motor. But only when I uncomment myservo_1 and so on, I can control the motor speed again. Can someone ...
0
votes
0answers
23 views

Analog Ph Sensor circuit considerations

I have bought this Analog Ph Sensor today, and one of the cautions the designer has left was: "After completing the measurement, disconnect the pH probe from the signal conversion board. The pH ...
-1
votes
1answer
40 views

How do I send Sensor Data from one Arduino to another Arduino that is a Webserver to post it?

I have been looking for over 2 hours now and just cant get it figured out. Im very confused as to how to do this. The solution I thought I found was to use HTTP POST. But I just cant get it to work. ...
0
votes
0answers
38 views

I need help with attaching codes in arduino [duplicate]

I'm in a project and I need to put multiple grove sensors in arduino and I've done with the others, but when I put the code of MQ3 sensor all the sensors stop showing in the serial monitor. I'm going ...
0
votes
0answers
12 views

Trying to get pseudorange data out of NS-RAW GPS

I have an NS-RAW CPGPS and I am trying to get GPS Data using an arduino. Do I just use the serial to get the data out of it and just convert and extract the data to what I need?
0
votes
0answers
21 views

Nodemcu single server with 2 clients

I am trying to connect my nodemcu server with 2 nodemcu clients. One client is connected and it works perfectly. I am unable to configure what to do for the other client to be connected and share data ...
0
votes
1answer
40 views

Using a Force Sensing Resistor and time input

So the code below measures how much force is exerted on the FSR. I would like to know what would I have to change in this code so that it can record for how long the FSR is being pressed for. So ...
0
votes
1answer
45 views

Nodemcu Server with multiple sensors

I am trying to connect my nodemcu client with nodemcu server, while my client is connected with two sensors (DHT11 and Soil Moisture) and it is workign perfectly, but on the server side I am unable to ...
0
votes
1answer
37 views

LCD displays bad character while counting rotation

I have been practicing RPM and rotation counter in arduino using infrared optocoupler. I try to implement number of rotation for drill machine but whenever drill starts to rotate, LCD prints bad ...
0
votes
0answers
25 views

Best approaches to reading a high-count quadrature encoder?

I have a 24v servo motor coupled to a 2,000 segment optical encoder that runs on 5v. That's 2,000 "ticks" per revolution at it's base resolution. (Full quad reading allows 8,000 ticks per revolution, ...
0
votes
1answer
17 views

Not getting any output from ECG sensor AD8232

I am trying for the beginning to run a simple Arduino code in order to test the functionality of the ECG sensor. What I am getting on the output are some random values around 600 or around 200. I ...
0
votes
1answer
26 views

Powering Moisture sensor via arduino pin

Can someone help me. I have this sensor I just connected it to the 3V pin of my arduino only I read online that its better to connect it to a Arduinopin for power so you can put it off when not ...
0
votes
0answers
18 views

ESP32 PH probe analogRead Value Alternating

i got an ESP32 WROOM32-OLED with a PH-Probe hooked up to it (PIN39). When i short the probe interfcace to get a PH07 reading (connecting the middle of the probe interface to ground) i get really ...
0
votes
0answers
49 views

Send ECG data using buffer in real time to the server without using delay

I am trying to make a ECG monitoring system using Arduino, GSM and ECG sensor which data should be sent to the private server in real time. Those data are then collected via Matlab on the remote ...
0
votes
1answer
44 views

Arduino Ultrasonic Sensor and LCD - Help Needed-

I just recently purchased an Arduino Uno 3 and I wanted to make an ultrasonic distance sensor that outputs the readings to a 16x2 LCD. I followed this guide: http://www.mertarduino.com/using-...
0
votes
1answer
35 views

Understanding datasheet of a HCHO gas sensor

I have a gas sensor whose datasheet is attached: DS-HCHO Now it says that UART communication is needed (P2P) where it (module) waits for Data Frame before tx the data frame to host which I need. ...
0
votes
0answers
26 views

Starting DC Pump with Arduinowhen it is powered by 9v Battery

I'm using Arduino Mega, and would like to start a DC Motor Pump. In my circuit, there are several sensors that are going to take up the voltage offered by Mega. Hence, I would like to know whether ...
0
votes
1answer
44 views

Problems / doubts on battery-powered Arduino Nano WiFi weather station I built

I've almost finished my first Arduino project and I'm realizing I might have gone a bit over my head - I'm a web programmer, I have a very basic electronics knowledge and started tinkering with ...
-1
votes
2answers
47 views

Arduino Micro & Thin polymer lithium batteries [closed]

Is this battery: Polymer Lithium-ion Battery Model Number: PGEB014461 https://www.powerstream.com/p/PGEB014461.pdf Producing enough energy to power the following Arduino-micro project: ...
0
votes
1answer
21 views

use of spec sensor in arduino uno

i have been trying to use NO2 spec senor in arduino UNO. how to write the code for it to get the output in terms of 'ppm' and how to give connection.with the helo of cross-sensitivity given in ...
0
votes
1answer
58 views

Communication with sensor KMX63 in I2C

I trying to use a new sensor the KMX63 with a Arduino Uno board, my sensor is on a evaluation board made by kionix. For the connexion il linked as follows: | Pin Uno | Pin evaluation board | | A5 | ...
0
votes
0answers
26 views

how do I detect a data connection?

on an ardunio, is there a way to detect if a data connection (vs power only) is present? I want to have my arduino behave differently if connected to a pc, or on stand alone power. specifically, I ...
0
votes
0answers
36 views

Difficulty getting Arduino data via puTTY

I am working on a project with a simple particulate matter sensor hooked up to an Arduino Uno. I'm using puTTY to log the sensor's output. My Arduino program converts the data to a numerical format, ...
0
votes
2answers
30 views

Soil moisture sensor not working in “pcb”

I have a little and common application in which a sc-28 moisture sensor reads humidity levels and turns a servo (which drives a little faucet) if the soil needs water. Arduino nano is the brain. All ...
0
votes
0answers
82 views

Using the Broadcom AFBR-S50 with Arduino

I'm trying to interface with a Broadcom AFBR-S50MV85G ToF sensor over SPI using an Arduino, which is complicated by the fact that the provided library and reference application is written for Cortex ...
0
votes
0answers
70 views

Using CoolTerm to receive Serial Data into a saveable file

Have functional code that reads data from sensors. Found that I need to use a terminal program to grab the data from the serial output using CoolTerm by Roger Meier. Wasn't able to test it with my ...
0
votes
1answer
81 views

Two flow sensors, one ESP32, LCD and/or Arduino

I want to build a flow meter but the Gal/Min rating of something like this flow meter is too low. I am thinking of strapping two side by side with suitable plenums for In and Out. I have found some ...
0
votes
0answers
51 views

I'm not getting the readings of sensors connected to an Arduino MEGA correctly using PLX-DAQ

I'm trying to send data from four sensors that are connected to my Arduino MEGA to an excel file using PLX-DAQ. So I want to keep taking readings at an interval of 1 second until I wish to stop. So I ...
0
votes
0answers
19 views

What is the advantage of using a 4-20mA shield rather than directly measuring the voltage drop?

I would like to measure a sensor which uses a 4-20mA current output. The easiest way would be to set the voltage drop to around 5V using a 250 ohm resistor and measure the voltage using the analog pin....
0
votes
1answer
40 views

Distinguishing between multiple Infra Red Transmitters [closed]

I am working on an Arduino project where I use an infra red camera along with 4 transmitters placed each on a corner of a square platform to park a robot perfectly on this platform. However, it is ...
0
votes
0answers
32 views

AD8232 picking up monitor signal on UNO

I have a AD8232 ECG sensor hooked up to an Arduino Uno following the Sparkfun guide. I do get a good clean signal, but only if I am a good 3m+ from my monitor. Otherwise I pick up a strong 50Hz signal....
0
votes
0answers
16 views

Suitable long-term sensors for PM, Ozone and NO2

I am totally new to Arduino. I have a Arduino Mega 2560 and I would like to perform long-term observations of PM, Ozone and NO2 (for around a year, outdoors). Do you have any ideas which sensors ...