Questions tagged as 'arduino'

Tagged questions
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Receive data from an arduino sensor for Android app (Android Studio)

Good evening! I need a help with the application that I am developing, I will make the bluetooth connection of my Arduino with the android application and everything is ok, I can connect and disconnect but I do not know how to receive data from...
asked by 16.10.2018 / 04:17
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How to generate a graph of temperatures x time of data taken by an arduino?

Good afternoon, I'm trying to use a program in python to read seven temperature values through the serial port with the arduino, so far the program I've done collects the data, saves it to a text file, and when I interrupt the execution it saves...
asked by 02.11.2018 / 22:34
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send arduino integer with esp8266 to mysql

I have an error when I send through ESP8266, of the integer value with the name number, my code is as follows: #include <ESP8266WiFi.h> // Use this for WiFi instead of Ethernet.h #include <MySQL_Connection.h> #include <...
asked by 27.09.2018 / 18:50
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How to do this routine in assembly show 3 digits on the screen?

I have the following code in avr assembly. link The teacher passed this code and asked us to have the program show a 3-digit result on the lcd screen, since now it only accepts 2. The routine is this: converte_ascii_2d: ld temp, -X...
asked by 02.08.2018 / 22:53
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Arduino MQTT connection through file reading

In connection with the mqtt server using the PubSubClient library, I can connect normally using: #define servidor_mqtt "192.168.15.24" But this way I'm always going to use the same address for the broker. So, I made a program that reads...
asked by 28.06.2018 / 15:46
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NodeMCU does not receive data as I send via UDP Protocol

I'm developing a simple application, the goal is to simply send the reading of a sensor connected to an Arduino NodeMCU to a Raspberry PI, and perform a similar reading using Raspberry and send to the NodeMCU. Basically, both are inside the s...
asked by 10.06.2018 / 01:44
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Split string with comma as delimitation in Arduino Serial.read ()

I'm developing a C # application with Visual Studio which sends a character to the Arduino only I now want to send a string with this character structure, number as in the example below: A,0 or R,30 or L,15 I have to s...
asked by 26.02.2018 / 01:44
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Arduino RFID communication conflict problem + Nanoshield Ethernet network

Good afternoon, I'm having a hard time creating an arduino program that reads an RFID TAG and it does the validation of the TAG in a mysql database. I have tried many different ways, but without success. I first tested an RFID example that worke...
asked by 14.12.2017 / 20:41
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Is it possible to choose between .hex files stored in arduino sd?

I worked on an embedded project that changed the modules of different functions, but the program code for the mega arduino is too big to integrate all the functions of the modules and to rewrite it, I researched it and tested it that it is possi...
asked by 21.12.2017 / 03:45
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Serial interrupt problem USART UDRE for ATMega328p

I'm having trouble using a USART serial interrupt in a program made in pure C and run on Arduino (Atmega 328p). My application requires pure C for efficiency and speed reasons, but I still want to maintain serial communication for debugging a...
asked by 30.10.2017 / 02:12