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Unanswered Questions

3,573 questions with no upvoted or accepted answers
10
votes
1answer
2k views

Update Dynamically Tkinter Widget Scale from Arduino Ports using python and firmata

I'm having trouble trying to get Arduino digital ports values and set these values into a Python Tkinter Widget Scale. I'm using Python and Arduino with Firmata. I'm able to access my arduino board ...
7
votes
6answers
2k views

Fluctuating readings of LM35 temperature sensor (+- 5°C) with Arduino UNO

I am trying to read a LM35 temperature sensor with Arduino UNO which I got as a gift. The issue is the fact, that my readings of sensor are, well, suspicious at least - they jump with each reading ...
5
votes
1answer
213 views

Working with multiplexers for constant voltage output

I'm working on creating a circuit where I'm trying to have the ability to switch multiple strands of LED rope on and off at a time using an Arduino and a multiplexer. With my current configuration, ...
5
votes
1answer
1k views

Leonardo-based tachometer?

I'm new here. I'm not a native speaker, so pardon my English. I just received my Arduino Leonardo today. I tried some basic calculations and stuff like blinking and LCD interfacing. Its interesting. ...
4
votes
1answer
1k views

Flash String Helper object as variable

So I have a Bunch of commonly used char arrays to build commands in my library. So to preserve memory, I have them put into flash, via PROGMEM ext, typedef const char PROGMEM ProgChar; ProgChar AT[] =...
4
votes
4answers
677 views

Thin battery to power arduino micro with nRF8001?

I'm building a project which needs to fit in a wallet. I have an Arduino Micro hooked up to a nRF8001. I attempted three button cells wired in series, which provided a solid 7.5 volts, but only 20mA. ...
3
votes
0answers
85 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 ...
3
votes
2answers
935 views

SIM800L and Arduino Sleep - getting whimsy Serial output after 5 calls

i'm working on project where i'm trying to achieve that arduino parse caller ID so i can use it later to send SMS with sensor reading data. Somehow i made that code (with much googling) and it works ...
3
votes
2answers
634 views

DS1307 Real-Time Clock

I am trying to make an Arduino project based on the Sparkfun DS1307 RTC (real-time clock). There are a few issues with how Arduino libraries don't support checking if the Arduino board has been ...
3
votes
1answer
5k views

Uploading Arduino code, OTA, via connected ESP8266-12E running Esp-Link

1. A short preliminary introduction I'm deploying a small network of three MEGAs connected trough an RS-485 bus. Each MEGA is connected to up to 16 push-buttons (wall-mounted) and two relay-module (...
3
votes
1answer
2k views

Encoder + Bounce2 Library

I am working towards debouncing my keyes rotary encoder using the Bounce2 library found here ( https://github.com/thomasfredericks/Bounce2 ). I believe the problem lies in my code as there isn't much ...
3
votes
1answer
432 views

RF24Mesh master-base node communication delay

I'm trying to build a mesh network using 4 nRF24L01 modules directly connected with Arduino Uno where 1 module is master node and the rest are base nodes. The workflow is exactly as follows I'm ...
3
votes
0answers
555 views

Using CLion as Arduino IDE — Cannot find Libraries

I'm having a problem using CLion as Arduino IDE when integrating 3rd-party libraries: Here is the CMakeList.txt cmake_minimum_required(VERSION 2.8.4) set(CMAKE_TOOLCHAIN_FILE ${CMAKE_SOURCE_DIR}/...
3
votes
1answer
3k views

Uni-directional communication between NodeMCU and Arduino spits out garbage

I am sending data from ESP8266 (NodeMCU) to Arduino using serial and 9600 baud rate on both sides. Since it is uni-directional and from NodeMCU to Arduino, I am not using a voltage regulator and I ...
3
votes
1answer
533 views

Ooops, no LSM303 detected … Check your wiring!

History I have an Adafruit 10DOF IMU Breakout which has been working on my Mega for some time. This morning my program did not run so I starting troubleshooting. Scenario I eventually plugged the ...

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