I am a new Arduino user and cannot upload sketches to my new Arduino Uno. I have tried the solutions listed on the forum (except for re-flashing the boot loader) and none have worked . The Arduino is listed under "port /dev/cu/usbmodem411 (Arduino/Genuino Port)". When I press the reset button, the LED on port 13 flashes. I have installed the IDE on two laptops and I get the same error. I cannot figure out why I am getting this avrdude error because my MacBook air seems to be connecting to the Arduino Uno. Here are the details of my system:
Operating system: macOS Sierra Version 10.12.2 running on a MacBook Air
Board: Arduino Uno
Whether or not you were ever able to upload to the board: Initially, I was able to change the delay on the Blink program and the Arduino responded. I then wrote the code for the Spaceship Interface (project 2 in the book), but it would not upload and I received the avrdude error. I did not make any changes to my computer in between modifying the blink code and uploading the Spaceship Interface code.
Here is the verbose output:
``Arduino: 1.8.0 (Mac OS X), Board: "Arduino/Genuino Uno"
Sketch uses 926 bytes (2%) of program storage space. Maximum is 32256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.
/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avrdude -C/Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf -v -patmega328p -carduino -P/dev/cu.usbmodem411 -b115200 -D -Uflash:w:/var/folders/mx/g6cyt6_50pl0p1g_ykv6xj980000gn/T/arduino_build_846487/Blink.ino.hex:i
avrdude: Version 6.3, compiled on Dec 16 2016 at 13:32:25
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "/Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf"
User configuration file is "/Users/boetzelaer/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
Using Port : /dev/cu.usbmodem411
Using Programmer : arduino
Overriding Baud Rate : 115200
AVR Part : ATmega328P
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PC2
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
eeprom 65 20 4 0 no 1024 4 0 3600 3600 0xff 0xff
flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff
lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
lock 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Programmer Type : Arduino
Description : Arduino
Hardware Version: 3
Firmware Version: 4.4
Vtarget : 0.3 V
Varef : 0.3 V
Oscillator : 28.800 kHz
SCK period : 3.3 us
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.00s
avrdude: Device signature = 0x1e950f (probably m328p)
avrdude: reading input file "/var/folders/mx/g6cyt6_50pl0p1g_ykv6xj980000gn/T/arduino_build_846487/Blink.ino.hex"
avrdude: writing flash (926 bytes):
Writing | ################################################## | 100% 0.19s
avrdude: 926 bytes of flash written
avrdude: verifying flash memory against /var/folders/mx/g6cyt6_50pl0p1g_ykv6xj980000gn/T/arduino_build_846487/Blink.ino.hex:
avrdude: load data flash data from input file /var/folders/mx/g6cyt6_50pl0p1g_ykv6xj980000gn/T/arduino_build_846487/Blink.ino.hex:
avrdude: input file /var/folders/mx/g6cyt6_50pl0p1g_ykv6xj980000gn/T/arduino_build_846487/Blink.ino.hex contains 926 bytes
avrdude: reading on-chip flash data:
Reading | #########################An error occurred while uploading the sketch
######################### | 100% 0.14s
avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x0042
0x15 != 0x14
avrdude: verification error; content mismatch
avrdude done. Thank you.
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.``