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Questions tagged [sensors]

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

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I'm running to an issue when measuring my sensor outputs. Previously I've connected my sensors directly to Nano analog pins and measured fine, but I want to use more sensors so trying a mux. Any help ...
JamesG's user avatar
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2 answers
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The x and y axis pins on the KY-023 are labeled VRx and VRy, but I'm curious as to what they stand for, as I couldn't find any official statements about it. I assumed it was "Variable Resistor X/...
Flamethrower's user avatar
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I am trying to read a WNK811 pressure sensor connected by i2c to an STM32 Nucleo F401RE, programmed as arduino. The WNK811 is a Chinese device, the device datasheet is highly minimal (inadequate in my ...
B M's user avatar
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Problem Overview I’m using an MFRC522 RFID module with an Arduino Uno, and it only detects RFID tags sometimes. The behavior is inconsistent—sometimes it reads the card instantly, and other times, it ...
Nano's user avatar
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I have this issue where I'm transmitting sensor data from Nano Sense Rev 2 (transmitter) board to Nano 33 BLE rev 2 (receiver). The receiver keep failing to detect and connect to the transmitter and ...
Anwar Elhadad's user avatar
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I have two RFP602 sensors that I use. One connected to GPIO2, the other to GPIO4, each connected to a 1Mohm resistance. The sensor connected to GPIO2 reads the data how I want it, I have to press a ...
Toderita Teodor's user avatar
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2 answers
147 views

I am trying to take ECG measurements using the Mikroe ECG 2 (ADS1194), connected to an Arduino Uno via an Arduino Uno Click shield. I am able to measure the ECG, and can read the heartbeats somehow in ...
Jakob Strutz's user avatar
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2 votes
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I'm reading an analogue oxygen sensor (SGX-4OX) with a Nano Every (ATmega4809-based). We're seeing up to about 60mV* in ambient air (it will reduce as we purge with nitrogen), and the ADC is 10-bit. ...
Chris H's user avatar
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I build a PCB using ESP32-S3-WROOM-1-N16R2 Controller. I programmed a BME680 sensor with this MCU. My pinouts are, BME_SCK 38 BME_MISO 19 BME_MOSI 15 BME_CS 5 This is my Arduino code, #include <...
Kuralmozhi's user avatar
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2 answers
321 views

My BME280 is returning 0 for temperature in Celsius, 0% humidity, 0.00 pressure (hPa) and 44330.00m for altitude. I am connecting it with I2C on a Raspberry Pi Pico and everyone on the team has ...
Madeline Covil's user avatar
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I am using Feather M4 express development board with DC Motor + Stepper FeatherWing and Ethernet FeatherWing stacked on it. The idea is to read the target position from the UDP from 0 t0 360 degrees ...
dreamcoder's user avatar
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I'm trying to create a system where I continuously measure color data from a fluid. I've created a 3D-printed box where the pins fit; if they're configured in their out-of-the-box arrangement, what ...
Bilal Bahadır Akbulut's user avatar
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2 votes
1 answer
198 views

We're using the ESP8266 to receive data from the Arduino Mega board, where our sensors are connected. Supposedly, our ESP is connected to the Blynk App. However, the values showing up in our dashboard ...
Earth_Lovers's user avatar
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I'm trying to combine 4 sensors' codes into one to display on the serial monitor: MAX30205, MAX30100, AHT20, and ENS160. I'm using the Adafruit ESP32 Feather V2 board. Here are the libraries that I've ...
GiaNguyen Pham's user avatar
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I am using PICSimLab to simulate a keypad. The configuration of the keypad is as shown in the picture: and the code is: #include <LiquidCrystal.h> #include <Key.h> #include <Keypad.h&...
ElectronicsBeginner's user avatar
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I'm working with a clone Arduino micro board. I've got the color sensor up and running fine. So the problem isn't the card. I'm using the example code, just to try out the module: // the setup ...
Bilal Bahadır Akbulut's user avatar
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I couldn't find any clear answers elsewhere, hence I'm asking here. I have a TensorFlow/TensorFlow Lite model which I have already trained on some sensor data. Now, how can I utilize this model on my ...
S.A's user avatar
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We are a non-profit group, we run a salmon rearing pond on Lake Michigan. We are upgrading our equipment that is over 50 years old with monitoring sensors. We are adding 9 temperature, 5 oxygen, 2 air ...
BigWally's user avatar
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249 views

I have an issue using an ultrasonic sensor. The problem is that when I connect the ultrasonic sensor to my Arduino Nano, it always gives some random values, usually 130 cm, I don't know why. I bought ...
hasan darwish's user avatar
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295 views

Error trying to execute serialNumber(): ReceK on transmit of address Error trying to execute serialNumber(): Received NACK on transmit of address Error trying to execute measureHighPrecision(): ...
Ajai Arjun's user avatar
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1 answer
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My project is Charging Battery via Solar and Piezoelectric sensor while also getting the Realtime Voltage of the Battery, Capacitor, and Solar. I want to use Vin as the source to get 5V because ...
walter's user avatar
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I have a project (still planning) with three I2C sensors: GPS, 3-axis gyro+accelerometer, and OLED. Do I connect SDA/SCL in series, or do I connect them in parallel?
Marifin -'s user avatar
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409 views

I am trying to get my DHT20 and OLED (both from the Arduino Sensor Kit) to work at the same time. I am able to get them working separately with their respective test codes, but when I try to combine ...
Darren D'Arcy's user avatar
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-1 votes
1 answer
546 views

I have a school project due tomorrow, and I'm planning to connect a servo motor with an ultrasonic sensor. If the distance is under 10cm, the servo motor should turn 180 degrees and will return to 0 ...
pinkuro's user avatar
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1 answer
363 views

I have rigged two different DHT22 sensors to an Arduino Nano board. Both temperature readings are more or less comparable but they produce very different humidity readings. The sensors are: Sensor No....
nick's user avatar
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2 votes
1 answer
270 views

I am working on a project where I need to get the RGB light value from surrounding ambient light. For that I am using an ESP32 with a Sparkfun ISL29125 breakout board. I have tried to scan available/...
Jackris19's user avatar
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2 answers
108 views

I have a question regarding serial buffer readout. At program start, I send a serial command to a sensor that 1. activates him and 2. let him send data - that works. When I unplug the sensor, the ...
Gymknopf's user avatar
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-1 votes
1 answer
88 views

I am a C# dev and these C++ data conversions are killing me. I have an Arduino sending binary data through LoRaWAN to AzureIOT. I am trying to decode my Temp/Humid/Bat payload that I am pulling out of ...
Terrence's user avatar
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1 vote
1 answer
590 views

I'm encountering a problem with my Arduino Nano board. When I attempt to upload sketches to the board using the Arduino IDE, only the Power LED lights up, and the TX and RX LEDs remain inactive. I've ...
Ryuu's user avatar
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2 votes
1 answer
286 views

I'm using the code below, but I had no success. I'm using this connection wire: The photo of the Arduino doesn't show the SCL and SDA pins, but please consider that it has 2 SCL pins and 2 SDA pins in ...
GUSTAVO TELES's user avatar
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2 votes
0 answers
118 views

To collect temperature and BPM, I connected a max30101 in my Heltec WiFi kit V3 with ESP32. The data collected are stored in arrays to extract statistical features from signals which an algorithm will ...
Alice's user avatar
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2 votes
2 answers
1k views

I have been using https://wokwi.com/ to learn Arduino and I am having a problem that seems to be happening no matter what I do. I am trying to set up a push button and an LED. The end goal here is to ...
wgm's user avatar
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-1 votes
1 answer
463 views

I've just started playing around with a NodeMcu V3 and a BME280 sensor. wiring VCC -> 3.3V GND -> GND SCL -> D1 (GPIO5) SDA -> D2 (GPIO4) I've tried this sketch / I2C scanner: it finds ...
Massimo Variolo's user avatar
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1 vote
0 answers
253 views

I am a complete beginner trying my hand at a home automation project. Part of my setup includes using an Arduino UNO REV3 (A000066), and connecting two CQRobot Ocean Non-Contact Water/Liquid Level ...
Cody Kentucky's user avatar
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2 votes
2 answers
516 views

This is my first project working with stepper motors, so I may have a bit of a shaky understanding of the electronic side of the project. I'm trying to create a simple device with 4 buttons connected ...
jonathan's user avatar
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4 votes
1 answer
1k views

I'm trying to build a pressure data logger using an Arduino and Mindman MP47P-03-F1 (https://www.mindman.com.tw/proimages/pdf/E_MP47_S.pdf) pressure sensor, the sensor is connected to an outer 12-24 ...
Omer Davidi's user avatar
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1 vote
1 answer
92 views

I can't seem to figure out what the problem is here. I am trying to upload this code to Arduino Uno but it keeps telling me that the library is not found. I did download the library for the MHZ ...
Maria's user avatar
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1 vote
0 answers
123 views

I have an Arduino Nano RP2040 Connect with two temperature sensors. A DHT22 is connected to D2 and pulled up with a 5 kΩ resistor to 5V, and a LSM6DSOX IMU is built in to the board. Here's my code: #...
Ryland Goldman's user avatar
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1 vote
3 answers
932 views

I have an arduino mega connected to a light sensor that reads the status of a machine's indicator light. I have a C++ application that controls the machine, and I would like the arduino to send the ...
Max Bluhm's user avatar
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1 vote
0 answers
102 views

I am trying to build a project where I have connected 8 Sparkfun TOF Sensors to an I2C MUX which is connected to a Sparkfun RedBoard. I need to read and display the data from each sensor on the serial ...
user90726's user avatar
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3 votes
0 answers
260 views

pretty new to arduino stuff and was hoping to get some help with my code. I'm trying to use 2 ToF sensors and get continuous readings from them. I understand that I have to use the xshut feature and ...
nh1628's user avatar
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-1 votes
1 answer
298 views

I want to use a color sensor for my Arduino project with Arduino Uno to detect the colors red, green, blue, orange, yellow purple of leaves of paper and then light my RGB led in those colors. I have ...
user90576's user avatar
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0 votes
1 answer
153 views

through the code that I've listed below, the idea was to have a sensor that detects objects in different ranges, if they're quite close, a light strip will turn on yellow with no buzzer. If they're ...
vanHellsing's user avatar
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1 vote
1 answer
116 views

I'm running a dc motor using esp32 and mosfet by taking readings of IR. Program works fine when used delay() but same program doesn't work when uploaded using millis(). //This uses fixed delay() // ...
Akash Patil's user avatar
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1 vote
1 answer
144 views

I have written a simple script to get angle measurements from a magnetic sensor. The script works very well on Windows. However, when compiling the script on a Linux VirtualBox (Ubuntu 20.04), the ...
Vuro H's user avatar
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-1 votes
1 answer
74 views

I use a lot Arduino Uno, but in this case, I have some BQ ZUM BT-328 boards, which are based on Arduino BT. The problem with some of BQ ZUM BT-328 boards is that the ultrasonic sensor (HC-SR04) is not ...
CGG's user avatar
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0 votes
0 answers
246 views

I have a Teros 11 moisture sensor that I have managed to make it work with the SDI-12 arduino library. However, this library does not work with SoftwareSerial and this is critical for me. There is a ...
user1584421's user avatar
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0 votes
3 answers
2k views

I'm working on Arduino Kit book's Project 8: the digital hourglass. I've got the picture and the circuit diagram below. My question is a fundamental one, and I really don't know how others figured it ...
AndrewGreen's user avatar
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2 votes
0 answers
538 views

The hardware I am using is ESP32 with MAX30102, MLX90614 and MPU6050 sensors and Using Blynk to show my data from the sensors. The issue I am facing is when I ran the code with all three sensors only ...
LLAMAFTW's user avatar
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1 vote
1 answer
516 views

I am working with pH sensor (https://wiki.seeedstudio.com/Grove-PH-Sensor-kit/ ) and arduino. The board provided with sensor is not having any potentiometer to set the voltage value when dipped in ...
Jashanjot Kaur's user avatar
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