Questions tagged [data]

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Parsing the data from an HTTP POST request on a ESP8266 / wemos

I'm sending an HTTP Post request on my Android App to my Wemos D1 mini pro and want to parse the incoming data (which is a json). My current code just prints out the whole POST request and I need to ...
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76 views

How to get the free/used space on a SD card and transmit it

I'm using this block of code to read and sum up the bytes of all the text files I have on an SD card: long get_sd_memory_taken() { File dir = SD.open("/"); long sd_memory_taken; int c = 0; ...
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64 views

Can not receive data from python code

I want to send 4 float numbers from a python code to an Arduino, I was trying to send it via serial and i have some problems here is my python code: import time import serial import struct data = ...
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31 views

Arduino acting strange with photoresistor data

So I stumbled into strange problem. I have this circuit, where I connect 2 photoresistors and bluetooth HC05 to Arduino. When one of the resistors senses bright light bluetooth sends '1' or '3' ...
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13 views

How do I post data from a real-time firebase db to my webpage?

I am trying to print data from my real-time Firebase db to my webpage. I have 0 experience with js and HTML, so the guides and tutorials I found online were too advanced for me. I currently have the ...
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41 views

How to transfer serial data or plot wirelessly on an arduino?

I have an arduino uno and an accelerometer connected reading vibrations. I want to be able to send the serial data or serial plot wirelessly from the arduino to any program(recommendations will be ...
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48 views

Serial data printing slowly

I have connected an arduino serial port to my PC and monitoring the output in realterm. I am trying to print: CR 11.98,123,3520,01CRLF But it is resulting with some delay. First CR 1 Is printed. ...
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696 views

Nodemcu single server with 2 clients

I am trying to connect my nodemcu server with 2 nodemcu clients. One client is connected and it works perfectly. I am unable to configure what to do for the other client to be connected and share data ...
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26 views

how do I detect a data connection?

on an ardunio, is there a way to detect if a data connection (vs power only) is present? I want to have my arduino behave differently if connected to a pc, or on stand alone power. specifically, I ...
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68 views

Wrong serial data

I am communicating with a system serially using Arduino Nano and I am able to communicate with it except for one issue. I have two functions and I want to call them together so that I can get two ...
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336 views

Sending sensor data from Android app to arduino via USB Serial

I've searched this and have only found solutions for receiving data FROM Arduino TO android, I need the opposite. I basically need to figure out how to press a button from my android phone that will ...
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37 views

Reading and sending data from a micro SD card using Micro SD card adapter without using buffer

Actually, I am trying to get data that appears in a .wav file, but I got the problem that it is not as fast as I need because, looking around the SD library I found that most of the bits are saved ...
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Unsure how to get pressure data from MCP3424

I am having trouble reading data from an MCP3424 chip, specifically the one from this website: https://uk.rs-online.com/web/p/general-purpose-adcs/6696086/ I have a pressure transducer that connects ...