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Top new questions this week:

Arduino I2C long string

I am trying to get 2-Arduinos passing data. The Master will request the data and the Slave send it. But, the length of the string the Slave will send is unknown each cycle. I found some things here ...

arduino-uno i2c

asked by X10WannaBe 3 votes answered by KIIV 0 votes

OOP vs procedural programming on arduino

It seems like the majority of Arduino applications are written without using classes / objects. Is there a reason for this? Does is slow down the Arduino or somehow present undesirable behavior?

programming c++ code-optimization

asked by Jacksonkr 3 votes answered by Majenko 8 votes

Circuit with buzzer not working :(

so I have a circuit with a buzzer and a resistor: This circuit should be working, but for some reason the buzzer doesn't sound. I pushed the buzzer into the breadboard as hard as I could, I put the ...

arduino-uno buzzer

asked by Max 3 votes answered by Sanu - Open Maker 6 votes

How to increase SD card write speed in arduino

I'm creating a data-logger system which logs data in SD card at a high speed of about 20000-30000 bytes per second. But the SD library in arduino currently writes data at about 4500-5000 bytes per ...

sd-card spi datalogging baud-rate

asked by ashish28ranjan 2 votes answered by William Roy 0 votes

Arduino zero Error: unable to find CMSIS-DAP device

I am uploading a test sketch(Blink) to my new Zero(with Wifi101 shield) and when I press Upload in the IDE, the Console says the following: Arduino: 1.6.10 (Linux), Board: "Arduino/Genuino Zero ...

arduino-ide arduino-zero openocd

asked by Derek Weissinger 2 votes

Why does this Arduino use a capacitor on the DTR reset line?

I'm kind of curious as to why there is a 0.1uF capacitor on this Arduino Pro Mini (https://www.arduino.cc/en/uploads/Main/Arduino-Pro-Mini-schematic.pdf). It seems like it would work just fine without ...

untagged

asked by Teague 2 votes answered by Gerben 2 votes

Arduino MCP23S17 I/O Expander (SPI)

I found this post and I am having almost the exact same issue. Nick Gammon (the god of arduino) has an excellent answer but I can't for the life of me implement it myself. I am not an advanced user ...

arduino-uno pins

asked by enterprisingsoul 2 votes answered by enterprisingsoul 2 votes

Greatest hits from previous weeks:

Arduino Nano uploading gives error: avrdude: stk500_recv(): programmer is not responding

I have a Arduino Nano (Sainsmart) that I'm trying to upload a sketch to. Under the Arduino IDE, the device selected was Arduino Nano w/ ATmega328. However uploading the sketch gives me the error ...

programming serial uploading sketch arduino-nano

asked by Nyxynyx 7 votes answered by microtherion 2 votes

Serial Data Plotting Programs

I need to plot Serial Data from Arduino. I require support for: Various data formats (e.g. signed, unsigned, 8 bits, 16 bits); Plots several data on the same axes; Exports / Imports file data. As ...

serial

asked by akellyirl 15 votes answered by niutech 7 votes