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Unanswered Questions

3,008 questions with no upvoted or accepted answers
10
votes
1answer
157 views

Cloud function getting stopped Parse.com in loop when calling from Arduino-yun

I have created a cloud function using the Parse.com Javascript SDK and I am calling those functions from Arduino. Following is code for the hello function: Parse.Cloud.define("hello", function(...
10
votes
1answer
1k 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 ...
5
votes
2answers
718 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
135 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, ...
4
votes
0answers
475 views

Arduino Uno doesn't work as Manchester code receiver

I'm sending some data from ATTINY85 to Arduino UNO using 433Mhz modules. Coding is Manchester using Manchester.h library from here. Transmitting data works perfectly, 433 receiver gets data alright. ...
4
votes
1answer
324 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 ...
4
votes
2answers
783 views

How can an Arduino Mega 2560+Wifi Shield 2.0 (SeeedStudio) receive data from database in a XAMPP server on my PC?

I'm trying to connect my Arduino Mega via Wifi to my XAMPP server. My main objective is get a value from my database and store it on a variable in Arduino code. With this new variable I'll be able to ...
4
votes
4answers
488 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. ...
4
votes
3answers
1k views

External Flash Memory File System

I'm building a weather data collector and I want to be able to dump that weather data somewhere. I've considered the options, and since I'm going to be storing a fairly small amount of data (in the ...
4
votes
1answer
1k views

Can an Arduino act as a GATT Server (Bluetooth LE)

I know it's pretty standard to set up an Arduino system as a BLE client, and use something like an app running on a smartphone as the GATT server, which receives the data and does something with it. ...
3
votes
3answers
1k views

Arduino IDE Permision Denied For Upload, Ubuntu

I am having issues uploading to my Arduino from the IDE on Ubuntu 18.04. The error message I have received is: Arduino: 1.6.10 (Linux), Board: "Arduino/Genuino Uno" avrdude: ser_open(): can't ...
3
votes
3answers
214 views

GUI interface with microcontroller to control a device through SPI

I am trying to develop a GUI to control a device hooked up on the Arduino. The Arduino communicates with the device through SPI. I have developed a GUI on MATLAB to visualize read by the Arduino. For ...
3
votes
1answer
612 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
1answer
209 views

How to get and interpret digital accelerometer data?

I am trying to connect an Arduino to a digital accelerometer. The Arduino receives commands from a mobile app and transmits over Bluetooth through hardware serial. I also posted this question here. ...
3
votes
0answers
296 views

Do software SPI read from a register using shiftin()

How to read from a register using software SPI, presumably shiftin()? It works using the builtin SPI library + hardware SPI. I seem to be able to write but not read using manual shiftin()/shiftout()...

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