I'm trying to run the basic AnalogInOutSerial example in the IDE 2 and I'm getting nothing. The LED isn't turning on and when I try to bring up the serial monitor the error is:
Port monitor error: EOF. Could not connect to COM1 serial port.
AVRDude compiles and uploads the program just fine. Upon completion, the IDE throws the COM port error. I've never seen this before and I don't know where to even begin troubleshooting. Connections have been checked a dozen times. WTF am I missing?
Which Arduino board are you using and what, if anything, is connected to it ?
Sorry. It's an UNO, and I've got a pot and an LED connected as per the instructions at the top of the program.
Have you got the pot connected to pin A0 or perhaps to pin 0 by mistake ?
No, it's connected to A0. And the LED is on 9.
UNO R3 or R4?
It's an R2.
UNO WiFi REV2 or really a very very old Arduino UNO pre-dating the R3?
The latter.
if you upload a simple code like
void setup() {
Serial.begin(115200);
Serial.println("Hello World");
}
void loop() {}
does it work ? (do you see Hello World in the Serial Terminal (configured at 115200 bauds) ?)
Double check that port. Shouldn't be port 1. Windows reserves COM1 I think.
With the Arduino connected, go to Device Manager > Ports (COM & LPT) and click the drop down to see what's listed.
Mine says
Arduino NANO Every (COM5)
Communications Port (COM1)
Printer Port (LPT1)
It acted like it was going to work, but when I tried to open the serial monitor, suddenly the IDE says it can't connect to COM1. Even though it says that it's connected when I check the menu.
is the Arduino connected to COM1 ??
Yes, and the program uploads and the RX LED pulses. AVRdude says good to go.
Device Manager concurs. Everything seems normal. COM1 is the only port listed, and it shows Arduino UNO on it.
Did you select the right board?
Certainly did.
I though OP said very old Arduino, not the UNO Wifi REV2
It isn't. Just a regular UNO 2. And here's what happens when I switch to COM2:
FQBN: arduino:avr:uno
Using board 'uno' from platform in folder: C:\Users\Boyenlil\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6
Using core 'arduino' from platform in folder: C:\Users\Boyenlil\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6
Detecting libraries used...
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino" "-IC:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\standard" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\sketch\\sketch_apr22d.ino.cpp" -o nul
Generating function prototypes...
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino" "-IC:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\standard" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\sketch\\sketch_apr22d.ino.cpp" -o "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\preproc\\ctags_target_for_gcc_minus_e.cpp"
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\builtin\\tools\\ctags\\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\preproc\\ctags_target_for_gcc_minus_e.cpp"
Compiling sketch...
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino" "-IC:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\standard" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\sketch\\sketch_apr22d.ino.cpp" -o "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\sketch\\sketch_apr22d.ino.cpp.o"
Compiling libraries...
Compiling core...
Using precompiled core: C:\Users\Boyenlil\AppData\Local\Temp\arduino\cores\arduino_avr_uno_84dcc0124026480ecb5b87cf345b9144\core.a
Linking everything together...
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-gcc" -w -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections -mmcu=atmega328p -o "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.elf" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\sketch\\sketch_apr22d.ino.cpp.o" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/..\\..\\cores\\arduino_avr_uno_84dcc0124026480ecb5b87cf345b9144\\core.a" "-LC:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E" -lm
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-objcopy" -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0 "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.elf" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.eep"
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-objcopy" -O ihex -R .eeprom "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.elf" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.hex"
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-size" -A "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.elf"
Sketch uses 1486 bytes (4%) of program storage space. Maximum is 32256 bytes.
Global variables use 200 bytes (9%) of dynamic memory, leaving 1848 bytes for local variables. Maximum is 2048 bytes.
"C:\Users\Boyenlil\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/bin/avrdude" "-CC:\Users\Boyenlil\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf" -v -V -patmega328p -carduino "-PCOM2" -b115200 -D "-Uflash:w:C:\Users\Boyenlil\AppData\Local\Temp\arduino\sketches\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.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 "C:\Users\Boyenlil\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf"
Using Port : COM2
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: ser_open(): can't open device "\\.\COM2": The system cannot find the file specified.
avrdude done. Thank you.
Failed uploading: uploading error: exit status 1
...And, when I switch to either port, the IDE automatically updates by itself.
And this is what I get when on COM1:
FQBN: arduino:avr:uno
Using board 'uno' from platform in folder: C:\Users\Boyenlil\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6
Using core 'arduino' from platform in folder: C:\Users\Boyenlil\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6
Detecting libraries used...
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino" "-IC:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\standard" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\sketch\\sketch_apr22d.ino.cpp" -o nul
Generating function prototypes...
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino" "-IC:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\standard" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\sketch\\sketch_apr22d.ino.cpp" -o "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\preproc\\ctags_target_for_gcc_minus_e.cpp"
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\builtin\\tools\\ctags\\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\preproc\\ctags_target_for_gcc_minus_e.cpp"
Compiling sketch...
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10607 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR "-IC:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\cores\\arduino" "-IC:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.6\\variants\\standard" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\sketch\\sketch_apr22d.ino.cpp" -o "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\sketch\\sketch_apr22d.ino.cpp.o"
Compiling libraries...
Compiling core...
Using precompiled core: C:\Users\Boyenlil\AppData\Local\Temp\arduino\cores\arduino_avr_uno_84dcc0124026480ecb5b87cf345b9144\core.a
Linking everything together...
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-gcc" -w -Os -g -flto -fuse-linker-plugin -Wl,--gc-sections -mmcu=atmega328p -o "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.elf" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E\\sketch\\sketch_apr22d.ino.cpp.o" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/..\\..\\cores\\arduino_avr_uno_84dcc0124026480ecb5b87cf345b9144\\core.a" "-LC:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E" -lm
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-objcopy" -O ihex -j .eeprom --set-section-flags=.eeprom=alloc,load --no-change-warnings --change-section-lma .eeprom=0 "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.elf" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.eep"
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-objcopy" -O ihex -R .eeprom "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.elf" "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.hex"
"C:\\Users\\Boyenlil\\AppData\\Local\\Arduino15\\packages\\arduino\\tools\\avr-gcc\\7.3.0-atmel3.6.1-arduino7/bin/avr-size" -A "C:\\Users\\Boyenlil\\AppData\\Local\\Temp\\arduino\\sketches\\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.elf"
Sketch uses 1486 bytes (4%) of program storage space. Maximum is 32256 bytes.
Global variables use 200 bytes (9%) of dynamic memory, leaving 1848 bytes for local variables. Maximum is 2048 bytes.
"C:\Users\Boyenlil\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/bin/avrdude" "-CC:\Users\Boyenlil\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf" -v -V -patmega328p -carduino "-PCOM1" -b115200 -D "-Uflash:w:C:\Users\Boyenlil\AppData\Local\Temp\arduino\sketches\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.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 "C:\Users\Boyenlil\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf"
Using Port : COM1
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: 3.3
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 "C:\Users\Boyenlil\AppData\Local\Temp\arduino\sketches\AF4F5821F28B5D80EDAF5B18F321767E/sketch_apr22d.ino.hex"
avrdude: writing flash (1486 bytes):
Writing | ################################################## | 100% 0.29s
avrdude: 1486 bytes of flash written
avrdude done. Thank you.
This is really starting to piss me off....