Hi there,
sorry, new to this.
I am running MacOSCatalina 10.15.7 on a MacBook pro.
The Arduino is a clone (which I didn't realise when I bought it!)
When I don't have the Arduino connected (straight to computer) there is no serial port (well, there are some but not an Arduino one). When I connect the Arduino, the power LED comes on, the L LED flashes. And in Tools>Port I get /dev/cu.usbserial-1420
I've tried restarting the computer, resetting the uno and a different USB port.
The verbose error is below. Any help much appreciated.
Arduino: 1.8.15 (Mac OS X), Board: "Arduino Uno"
Sketch uses 932 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.usbserial-1420 -b115200 -D -Uflash:w:/var/folders/_q/90gd3vnj01x25rmt59jb58dh0000gp/T/arduino_build_920335/LEA4_Blink.ino.hex:i
avrdude: Version 6.3-20190619
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/michaelmoneypenny/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
Using Port : /dev/cu.usbserial-1420
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/_q/90gd3vnj01x25rmt59jb58dh0000gp/T/arduino_build_920335/LEA4_Blink.ino.hex"
avrdude: writing flash (932 bytes):
Writing | ################################################## | 100% 0.16s
avrdude: 932 bytes of flash written
avrdude: verifying flash memory against /var/folders/_q/90gd3vnj01x25rmt59jb58dh0000gp/T/arduino_build_920335/LEA4_Blink.ino.hex:
avrdude: load data flash data from input file /var/folders/_q/90gd3vnj01x25rmt59jb58dh0000gp/T/arduino_build_920335/LEA4_Blink.ino.hex:
avrdude: input file /var/folders/_q/90gd3vnj01x25rmt59jb58dh0000gp/T/arduino_build_920335/LEA4_Blink.ino.hex contains 932 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 0.15s
avrdude: verifying ...
avrdude: verification error, first mismatch at byte 0x0000
0x62 != 0x0c
avrdude: verification error; content mismatch
avrdude done. Thank you.
the selected serial port
does not exist or your board is not connected
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.