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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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HX711: One approach to fixing problems
I was driving myself nuts getting HX711s to work. I had always been able to get one to work, but when I tried to get two to work, disaster struck. I'll skip the rabbit holes here because they are...
View ArticlePN5180 freezes Arduino
I run an escape room and I have several puzzles that use PN5180 to read RFID tags. Since players don't know where they are, they tend to swipe the tags across the reader or sometimes bring magnets...
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Noise reduction and ADC precision tips for STM32L031K6 + HX711 weighing system
Hi everyone, I am working on a low-power weighing scale project using an STM32L031K6 microcontroller, an HX711 24-bit ADC, and a RAK3172 (LoRaWAN) module. In my firmware, I use a moving average...
View ArticleBare-metal I2C1 on STM32F411 — WHO_AM_I returns 0x98, not 0x68 (GY-521/MPU6050)
Hi all, I'm working through a self-directed embedded systems curriculum, writing everything at the register level (no HAL, no CubeMX-generated I2C code) to actually understand what's happening under...
View ArticleArduino Compass Sensor Shows Wrong Heading Near Electronics Even After...
I’m using an Arduino with a compass sensor module, and I’m having some problems with the heading accuracy. The sensor works fine in some places, but when I move it around or use it near other...
View ArticleNew GY-NEO6MV2 gives absolutely no output and no sign of life
Hello, i wanted to test my new GY-NEO6MV2 and i firstly used a level converter to make sure if it is actually 3.3v it won't fry itself. I connected the GPS module but no output, not even a single...
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BNO085 responds at I²C address 0x4A but initialization fails on Arduino UNO...
Hello, I am trying to connect a BNO085 9-DoF IMU to an Arduino UNO R4 WiFi using a Qwiic cable. The Arduino UNO R4 WiFi Qwiic connector uses the secondary I²C bus, so I am using Wire1. An I²C scanner...
View ArticleUS5881LUA Hall Effect Sensor Output Stuck LOW - digitalRead() returns 0 at 3.8V
Hi everyone, I am working on a fan speed monitoring project using the US5881LUA Hall effect sensor (Adafruit Product 158) with Arduino and cannot resolve a persistent issue after hours of...
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