Which sensor should I buy to detect a flag drop
Hello, me and my school chapter for I.E.E.E are competing in the hardware competition, and long story short we need a robot to move only when a flag is dropped. We want to use some kind of motion...
View ArticleDo sensors give the same results on diffrent boards
specificly Dallas temp and DHT , if I wired the same sensors to diffrent boards would they all yeild the exact same readings? Thanks 11 posts - 9 participants Read full topic
View ArticleError output reading
Hello, I'm making a project, which is a DS18B20 temperature sensor, and I'm also calibrating the salinity sensor of the salinity sensor, but when I want to read it, the temperature sensor initially...
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Waveshare ESP32S3-POE-ETH with rain sensor RG15, cannot get serial comms going
Hi, The ESP32 is not communicating via UART with the RG15. Maybe someone could spot where this is running off the rails? Much of my understanding has come from this excellent project: GitHub -...
View ArticleWater level sensor not functioning properly?
#include "Arduino_LED_Matrix.h" #define SIGNAL_PIN A0 #define POWER_PIN 7 #define PWM_PIN 9 ArduinoLEDMatrix matrix; byte frame[8][12]{ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0,...
View ArticleUltrasonic sensor for measuring diameter
What’s up, guys! I need your advice and thoughts on using an ultrasonic sensor to measure a diameter on an object like an apple or melon. From my research, you can scan it while moving your arm in an...
View ArticleConflict when using IR sensor and MAX98357A
Hello. I have a sample sketch which uses the Sharp 2y0a21 IR sensor. Depending on the distance, it generates a tone using a MAX98357A amp connected to a speaker; however, the sound is distorted. If I...
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Arduino Nano 33 BLE sense rev 2 connect to VL53L0X
I am trying to connect Arduino 33 BLE sense rev 2 to the VL53L0X tof sensor, but it doesn't work. Is my wiring incorrect or the coding is incorrect, can someone help me to take a look? 16 posts - 5...
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Distorted ECG Waveform & Missing PQRST Peaks on AD8232 + ESP32-S3 (TinyML...
Hi everyone, I am currently working on an Edge AI / TinyML Wearable Cardiac Monitoring System using an ESP32-S3 microcontroller and an AD8232 ECG sensor module. The ultimate goal of the project is to...
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Not receiving NMEA messages
Hi ive connected the GNSS GPS BeiDou Receiver Module - I2C & UART to a pi pico using uart with D/T connected to RX and C/R connected to TX (I also tested the other way round) and - to GND and + to...
View ArticleCrash when addressing Adafruit_TMAG5273
Hi All. I did a basic test of this sensor, and it was working fine, using the following code: /*! * @file simpletest.ino * @brief Simple test for the Adafruit TMAG5273 3-axis Hall-effect sensor * *...
View ArticleCorrect temperature scale formula for MPU6500
Hi, I have a few chinese breakout boards with MPU6050 and 6500 chips on them. It seems that Ivensense use two different scaling formulae to get form the sensor data to a temperature in celcius....
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DHT sensors with ESP8266 to provide 2 readouts on wifi - html error on...
Hi, I've been using 2 DHT sensors to provide reading over wifi as per the topic: Using 2 DHT sensors with ESP8266 to provide 2 readouts on wifi Sensors Hi there, I've set up a DHT sensor to output to...
View ArticleSX1278's DIO0 pin is never being set on high, so my interrupt doesn't work
Hello! I'm trying to read data from an SX1278 (specifically it's an Ai-Thinker Ra-02), and if I just try a LoRa.parsePacket() on the loop(), it receives everything correctly (I'm transmitting data...
View ArticleDFROBOT Photoelectric Switch (4m)
DFRobot SEN0523 Infrared indoor break beam sensors How to use sensors outdoor in sunshine and extreme solar heat DFRobot SEN0523 break beam sensor outdoor direct sun housing 2 posts - 2 participants...
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How to verify BME680 accuracy
I have connected BME680 + OLED + ESP32 WROOM I put this in my fridge for 1 minute and I see it shows 25C . ( expected atleast 10C). How can I confirm it is accurate? 11 posts - 8 participants Read...
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AD8232 ecg sensor NOT showing correct waveform
Hello everyone! I am a newbie in this area. I have been reading all the posts from others that have been successful with this project, but mine is showing an incorrect ecg waveform. I am using a Nano...
View ArticleProblem reading analogue pins
Hi all, Can someone that knows more about analogue pins than me please help. Now, right from the get go I know this is my lack of knowledge so I hope you can help This is on a Mega 2560 board - Note -...
View ArticleAir pressure sensor can be used to measure water ?
I bought an air pressure sensor. Can that be wet ?? Can I connect a hose to the sensor y measure water pressure ? The module sensor is one of this XGZP6857 XGZP6857A 5V 0-40KPa any help is welcome 32...
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Schematic for HX711 sensor. Can this work with the Arduino library?
Hey everyone! I'm thinking about making a weight sensor based on the HX711 and found this schematic that looks pretty good to me. Has anyone built their own board and knows if it'll work with Arduino?...
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