Unanswered Questions
1,616 questions with no upvoted or accepted answers
1
vote
0
answers
27
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Configuring the colors of the IDE
I do not like the dark theme at all and I set the Light theme, but the output background color is still black. I know that somewhere there is a file where it is possible to tweak the colors, but I ...
- 11
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36
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How to wire a 9v power supply to an LED matrix and power Arduino Uno?
So I've been looking for some advice but I can never find a good answer. My current project requires me to externally power a btf lighting 22*22 matrix to an external power supply. I bought one from ...
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-1
votes
1
answer
52
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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 ...
- 2,303
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votes
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answers
52
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How to Connect/configure HC05 (Bluetooth module) to a shield?
I am a newbie to Bluetooth communication in Arduino.
I have 2 Arduino boards (one runs my main sw, second act as slave to operate a remote command coming from the main board) that i want to establish ...
- 1,525
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answers
53
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ESP8266 Not Booting Properly on First Power On – Works After Restart
I'm working on an ESP8266-based water level monitoring system using an ultrasonic sensor and an I2C LCD. The problem I'm facing is that sometimes the ESP8266 does not boot properly when powered on for ...
- 610
1
vote
1
answer
50
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Push button isn't pushed but keeps printing or inputting 1/HIGH
I have this Arduino code that will print 1 in the serial monitor and even prints two 1's. I haven't even pushed or clicked the push button, yet it already is already set to HIGH and even activates to ...
CommunityBot
- 1
0
votes
1
answer
56
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Alternate LED Blinking Using PushButton
I have an task for my class where we have to make 2 LEDS blink alternatively using a pushbutton. I've figured out how to do the blinking and alternating but from time to time one of the led would go ...
CommunityBot
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-1
votes
1
answer
74
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FastLED with WS2812B 241228
Hello Arduino Stack Exchange forum,
Learning how to use the FastLED to control a string of 150 WS2812B LEDs
Code copied herewith below compiles and operates as expected.
Trying to figure out how to ...
- 38.8k
-1
votes
2
answers
87
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 ...
- 1,595
-1
votes
2
answers
59
views
Reading the state of a pin at 35V using arduino at 5V
I have a gate controlled by a motorline MC2 motherboard. I want to add a distance sensor controlled by arduino so that I can give it the opening command when leaving the yard.
From what I have seen, ...
- 2,303
1
vote
1
answer
102
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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 <...
CommunityBot
- 1
-1
votes
1
answer
54
views
Running full voltage through Transistors
Hello I am trying to create a fan controller using Arduino. The (Placeholder LED's) fans run at 12V 0.23A DC so I have an external power supply for them. I plan to control the flow of this with NPN ...
- 610
0
votes
0
answers
25
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ESP32 Bluetooth Pair scanFilter not working properly
I am trying to make a bluetooth device with esp32 s3. Pairing should work like a headfone. At the First start, any device can connect my ble ESP32 after connecting I will add in whitelist this device ...
- 297
1
vote
0
answers
46
views
SB Components Micro RP2040 and ST7789 2.4 TFT LCD SPI display not working together using any library
I have a Micro RP2040 board from SB Components. Link to this product
With this I also have a 2.4 inch SPI TFT LCD screen with an ST7789 controller Link to the screen, it's on that page just scroll ...
- 1,525
0
votes
1
answer
90
views
How to run G code with SoftwareSerial?
I'm trying to build my own CNC machine. Since I need to control a large number of motors at the same time, I want to control it via an Arduino master and several slaves with CNC shields. Now I'm ...
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