Unanswered Questions

4,171 questions with no upvoted or accepted answers
5
votes
0answers
130 views

Handling non-standard I2C read response lengths with Wire library

I'm trying to read from a Sam&Wing XW12A 12 channel touch sensor IC using I²C. The IC responds to an address read packet with 16 uninterrupted bits representing its state. However, since I²C ...
5
votes
0answers
170 views

nRF24L01 continuously reading closed pipe

I am testing communication between two nRF24L01 modules. The receiver is getting the transmitted message but is also continuously reading (null) data from a closed pipe? I am using the RF24 by TMRh20 ...
5
votes
0answers
731 views

Ultrasonic Flowmeter Using TDC-GP22 and Arduino Uno

I'm working on a project of Ultrasonic Flow Meter with TDC-GP22 using Arduino UNO. I used the library of leokoppel In my code,the configurations of the registers are copied from the Application Note ...
4
votes
0answers
93 views

Adafruit_LEDBackpack library interfering with analog input reading

I'm trying to do something I think would be simple. I'd like to read the input of a electret microphone board and update the Adafruit 24-segment LED Bar Graph. I got each individual item working ...
4
votes
1answer
718 views

Measure lipo voltage while powering arduino

I have a arduino pro micro 5V that I want to power with a 3.7V lipo. I also have a charging module to charge the lipo. (https://www.banggood.com/nl/TP4056-1A-Lipo-Battery-Charging-Board-Charger-...
4
votes
0answers
4k views

ESP32 IR remote

my board is a firebeetle esp32 that I am using as an IR remote. After using the Ken Shirrif IRremote library for about 6 months successfully, then the time came to change a few things on the web ...
4
votes
0answers
1k views

Clion Arduino plugin: Error:Could not find Arduino SDK (set ARDUINO_SDK_PATH)

I am trying to setup CLion as my workspace for my arduino. I have installed the two Arduino plugins for CLion, generated a new sketch project, but I am getting cmake errors on opening the project. ...
4
votes
0answers
512 views

Arduino WebSocket Client "Connection Failed"

I use this code to connect Arduino MKR1000 to API through Web Socket, but it didn't connect to the server. Can any one help me to correct the code. This is the Arduino code: #include "Arduino.h" #...
4
votes
0answers
2k views

Non-blocking MQTT library

Are there any MQTT libraries that do not block while connecting? I'm currently using PubSubClient, and the connection part contains this code: https://github.com/knolleary/pubsubclient/blob/master/...
4
votes
2answers
135 views

Arduino Uno R3 stops executing code, when trying to instantiate multiple HX711 objects

This is my first time asking something on this platform, so if form or anything else is off, please feel free to point out things about how I could refine it and ask more concisely in the future. I'm ...
3
votes
0answers
41 views

PCA9685 - Hardware problem with diode?

I'm working on a project, where I need to run several high-torque servos. For that I bought come of these PCA9685 boards. I hooked everything up with my arduino and connected an external 5V - max 3A ...
3
votes
0answers
78 views

220v lightbulb gradual dimmer

I am trying to turn my incandescent bulb gradually,say its brightness should go from zero to 100% in 10 mins. In doing so I found the following code and it works well but it's not as gradual as I ...
3
votes
0answers
53 views

SHT30 giving wrong humidity

I have an SHT30 sensor which is feeding to my Arduino via an RS485 connection. The readings are coming in as they should be for both temperature and humidity. The problem, however, is that the ...
3
votes
1answer
39 views

Wirelessly (but fast) transfer STEP and DIR output from Arduino to stepper driver

Very short version: Looking for a way to wirelessly get STEP and DIR signals (only those two signals) from an Arduino to a DRV8825 stepper driver about a meter away: Arduino -> STEP and DIR IO pins ...
3
votes
0answers
136 views

SPIFFS and LittleFS don't show all my files with readdir() and can't open() them

I created a simple sketch that just tries to list the files in SPIFFS. The SPIFFS filesystem was created with the version of mkspiffs that's part of the esp8266 package. The upload all seems to work, ...

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