Questions tagged [sensors]
Use this tag for questions about selecting, connecting, using, and debugging sensors.
1,260 questions
-2 votes
0 answers
37 views
Best Arduino Components/Sensors that is best for counting and classifying small object such as grains [closed]
I am about to conduct my thesis study entitled "Design and Development of an Arduino-Based Automated Milled Rice Counter and Classifier" in which we are about to count and classify these ...
1 vote
0 answers
53 views
Issue reading sensor values with CD74HC4067 16 Channel Mux
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 ...
- 11
-3 votes
2 answers
65 views
What does VRx stand for in the KY-023? [closed]
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/...
- 105
0 votes
1 answer
52 views
Problems reading WNK811 i2c sensor on arduino using wire library without device library
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 ...
- 13
-1 votes
1 answer
172 views
MFRC522 RFID RC522 Only Works Sometimes – Unreliable Detection Issue
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 ...
- 1
0 votes
1 answer
86 views
Connecting two Arduinos via BLE 5.0
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 ...
0 votes
1 answer
117 views
ESP32 pressure sensor readings (RFP602)
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 ...
-1 votes
2 answers
136 views
50 Hz powerline noise using Arduino and mikroe ECG 2 (ADS1194)
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 ...
2 votes
1 answer
187 views
Custom (external) reference voltage for ADC: is there a lower limit?
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. ...
- 168
1 vote
1 answer
155 views
ESP32-S3 Does not read BME680 Data
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 <...
- 21
1 vote
2 answers
296 views
Why is my BME280 sensor returning 0 for all data values?
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 ...
0 votes
1 answer
157 views
How to control a stepper motor using an absolute position sensor which has an error band?
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 ...
- 11
-1 votes
1 answer
58 views
How can I downsize protruding pins from sensors to so I can use a smaller housing?
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 ...
2 votes
1 answer
189 views
Software serial communication problem between ESP8266 and Arduino Mega for plant monitoring system (using Blynk IoT)
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 ...
- 21
1 vote
0 answers
99 views
Help with combining sensor codes
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 ...
