Unanswered Questions
1,827 questions with no upvoted or accepted answers
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How does a sensor data move from physical layer to application layer
I have used Arduino IDE to program a IOT gateway using ESP32 and W5500 ethernet module to use them as a ethernet webserver.
I wanted to know for educational purpose, I know that sensor belong to ...
- 11
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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 ...
- 1
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2
answers
43
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Can't sync ESP32 with Blynk
I was trying to display the readings of my dht11 sensor on the Blynk dashboard but I am struggling a lot. A little help would be really appreciated.
#define BLYNK_PRINT Serial
/* Fill in information ...
- 100
-1
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1
answer
53
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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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2
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59
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How can you trace out the short-term trajectory of a 6DOF IMU
I've looked and looked on forums, wrote prompt after prompt in DeepSeek and ChatGPT but I've hit a roadblock.
I'm currently working on a project where I want to write numbers in the air using a ...
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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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100
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ESP32 Upload Fails: “Failed to connect to ESP32: No serial data received” (Worked Previously)
I’m trying to upload code to my ESP32 board using the Arduino IDE, but I’m consistently getting the following error:
A fatal error occurred: Failed to connect to ESP32: No serial data received.
For ...
- 1,773
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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
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votes
1
answer
53
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ESP32 Timers - Controller Crashes Above 240 kHz, Duty Cycle Becomes Unstable
I'm trying to generate three synchronized signals on ESP32 for a device that requires precise timing. However, when I increase the frequency above 240 kHz, the controller crashes, and the duty cycle ...
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
68
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Getting a WDT reset on ESP32
I have a project that uses a GY-53 BMP180 and ESP32.
Each time I connect ESP32 to USB after uploading, I get this error:
22:27:27.352 -> rst:0x8 (TG1WDT_SYS_RESET),boot:0x13 (...
- 143
-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
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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