Making sense of MAX30102
The MAX30102 is a small IC that enables non-invasive measurement of a person's pulse and blood-oxygen saturation. It shines two LEDS, on red and one infra-red, into a suitable area of the body and...
View ArticlePH sensor out of range readings being sent to another arduino using hc-12...
So I have a boat robot it has a ph level sensor, the value of ph sensor being sent to hc-12 is accurate when being powered through USB to pc/laptop, but when powered by battery with buck converter the...
View ArticleFingerprint sensor not working
My computer does not see the fingerprint module even though I did the exact same connection diagram, codes and libraries. https://www.youtube.com/watch?v=6rK-PJJdtX4 1 post - 1 participant Read full...
View ArticleLaser Range finder with Arduino Nano
REF. need help for setting it up. i have the same LRF but this is not working 7 posts - 4 participants Read full topic
View ArticleClik here to view.
Unstable signal from IR remote control
I have a project using IR receiver ky 022 and IR remote control. I used the code (IRremote library version 2.6.0) and wiring on the Internet: #include <IRremote.h> #define IRPin 2 IRrecv...
View Article350 ohm strain gauge + HX711 zero reading
I have made a Wheatstone bridge using strain gauge of 350 ohm and 3 resistor of 330ohm and 3 resistors of 20 ohm. After creating the bridge and making connection to the HX711 and Arduino i am getting...
View ArticleProblema con HC-06
Buongiorno, ho riscontrato un problema con un modulo HC-06, dal momento che riesco a connettermi via bluetooth con il mio telefono, ma non riesco a ricevere alcuna risposta da arduino, in particolare...
View ArticleClik here to view.
RFIDksj kate bro ha
Google Docs RFID #include #include #include #define SS_PIN 10 #define RST_PIN 9 #define SERVO_PIN 3 Servo myservo; #define ACCESS_DELAY 2000 #define DENIED_DELAY 1000 MFRC522 mfrc522(SS_PIN, RST_PIN);...
View ArticleWorking a New project - Help me what module should I use?
I'm working on a project or capstone, Help me guys what module should I use to measure the speed while driving and then alerts using buzzer and pre-recorded voice saying "You're overspeeding, slow...
View Article8 in 1 sensor need help
Soooo im using a 8 in 1 soil sensor for our project and for somereason all of the codes work propwrly but when you enter the serial monitor it always goes Failed to read data from Dht sensor Response...
View ArticleNoise in Analog Reading of Voltage from my Tachometer
Hello everyone, I am pretty new to arduino but have some experience. I am using my arduino to read tachometer data from my miata and I am using a 5K and 2.1K ohm resistor voltage divider. I have the...
View ArticleAnother ADS1115 Q - why does the channel 0 value change here?
Hi another ADS1115 question please. (And it's not on an Arduino but on a Pi Zero 2W thru an HW-660 Pi Hat/Board with an ADS1115 attached. See:...
View ArticleMQ-131 Ozone Sensor low output voltage problem
Hi everyone, I’m having an issue with the MQ-131 ozone sensor. From what I understand, when the sensor is powered on and there’s no ozone present, the output voltage should be around 4V. However, I’m...
View ArticleHelp me with my problem with soil moisture sensor
Hello, me and my teammates are making a robot about soil moisture sensor. It's already done and just doing any test but earlier we faced a problem and since I'm the programmer, I'm the only one who...
View ArticleCommon CS pins on Arduino uno for SPI devices
I am trying build a temperature monitor using multiple MAX6675 thermocouple to digital converters. In my code shown below, I sequentially read out each thermocouple. I realise that according to SPI...
View ArticleBME280 not detected in i2c scanner
this is kinda a long one, it needs an explanation I bought a BME280 module recently and I soldered the pins onto it (i checked the continuity and made sure there were no shorts between the soldered...
View ArticleNPK Sensor working on arduino uno but on on arduino mega
Heya, I've been having trouble making with using my NPK and pH sensor on the arduino mega. At first i believed it was an issue with the pins, but switching the DI and RO pins didn't seem to fix it....
View ArticleESP32 XIAO S3 SeeedStudio v1.2 and PMS5003 not working
Hi guys ! I have ESP32 XIAO S3 SeeedStudio with a PMS5003 Air Quality sensor and I can't achieve to make it work. I have uploaded the test firmware only showing the values provided by the PM5003 but...
View ArticleClik here to view.
DS18B20 and Firebeetle 2 (ESP32-C6) : no device found
Hello, I'm experiencing a particularly strange problem with DS18B20 sensors using a FireBeetle 2: I've used several probes, but OneWire can't return a device, so it always returns -127°C on...
View ArticleHow to make BME280 sensor and MPU6050 sensor work in same sketch with...
I have made init methods for both sensors inside of their own classes, and then I tried to combine them in the same sketch. I created a custom I2C object wire to be used with the MPU6050 to stop the...
View Article