Sorry for asking this question for the 1000th time. I see a permission denied error on /dev/ttyACM0 but only with the Arduino IDE. I can access the port directly and can use PlatformIO.
I would like to get the Arduino IDE working so that it's easier for other potential users to use my code.
Environment:
Ubuntu 20.04 / Gnome (flashback)
Kernel 5.4.0-70-generic
$USER = will
Arduino IDE 1.8.13 - I have previously configured ESP32Arduino and Teensyduino
Here are some details about what I've tried.
I see the dialout group configured and seem to have access the port. I have a number of udev rules which were configured by the arduino IDE setup script and have tried various custom / excessively permissive rules suggested in topics like this one:
~ ls -lh /dev/ttyACM0
crw-rw---- 1 will dialout 166, 0 Apr 10 09:02 /dev/ttyACM0
~ groups
will adm tty uucp dialout cdrom sudo dip plugdev lpadmin lxd sambashare docker
~ ls -lh /dev/ttyACM0
crw-rw---- 1 will dialout 166, 0 Apr 10 09:02 /dev/ttyACM0
~ touch /dev/ttyACM0
~ ls /etc/udev/rules.d/
40-dfuse.rules 70-snap.snapd.rules 90-extraacl.rules 99-arduino-101.rules
70-snap.chromium.rules 70-snap.spotify.rules 98-openocd.rules avrisp.rules
When uploading my sketch from the Arduino IDE there is a permission denied error:
Sketch uses 14412 bytes (50%) of program storage space. Maximum is 28672 bytes.
Global variables use 1144 bytes (44%) of dynamic memory, leaving 1416 bytes for local variables. Maximum is 2560 bytes.
Forcing reset using 1200bps open/close on port /dev/ttyACM0
PORTS {/dev/ttyACM0, /dev/ttyS4, } / {/dev/ttyS4, } => {}
PORTS {/dev/ttyS4, } / {/dev/ttyACM0, /dev/ttyS4, } => {/dev/ttyACM0, }
Found upload port: /dev/ttyACM0
/home/will/arduino-1.8.13/hardware/tools/avr/bin/avrdude -C/home/will/arduino-1.8.13/hardware/tools/avr/etc/avrdude.conf -v -patmega32u4 -cavr109 -P/dev/ttyACM0 -b57600 -D -Uflash:w:/tmp/arduino_build_834061/leet_keyboard.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 "/home/will/arduino-1.8.13/hardware/tools/avr/etc/avrdude.conf"
User configuration file is "/home/will/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
Using Port : /dev/ttyACM0
Using Programmer : avr109
Overriding Baud Rate : 57600
avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied
avrdude done. Thank you.
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
After struggling to find a solution for several hours I setup PlatformIO and it worked on the first attempt:
Processing leonardo (platform: atmelavr; board: leonardo; framework: arduino)
-------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/atmelavr/leonardo.html
PLATFORM: Atmel AVR (3.3.0) > Arduino Leonardo
HARDWARE: ATMEGA32U4 16MHz, 2.50KB RAM, 28KB Flash
DEBUG: Current (simavr) On-board (simavr)
PACKAGES:
- framework-arduino-avr 5.1.0
- tool-avrdude 1.60300.200527 (6.3.0)
- toolchain-atmelavr 1.70300.191015 (7.3.0)
Converting leet_keyboard.ino
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 8 compatible libraries
Scanning dependencies...
Dependency Graph
|-- <MIDI Library> 5.0.2
|-- <MIDIUSB> 1.0.5
|-- <NeoPixelBus> 2.6.2
| |-- <SPI> 1.0
|-- <EEPROM> 2.0
Building in release mode
Compiling .pio/build/leonardo/src/leet_keyboard.ino.cpp.o
Linking .pio/build/leonardo/firmware.elf
Checking size .pio/build/leonardo/firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM: [==== ] 44.7% (used 1144 bytes from 2560 bytes)
Flash: [===== ] 50.3% (used 14426 bytes from 28672 bytes)
Configuring upload protocol...
AVAILABLE: avr109
CURRENT: upload_protocol = avr109
Looking for upload port...
Warning! Please install `99-platformio-udev.rules`.
More details: https://docs.platformio.org/page/faq.html#platformio-udev-rules
Auto-detected: /dev/ttyACM0
Forcing reset using 1200bps open/close on port /dev/ttyACM0
Waiting for the new upload port...
Uploading .pio/build/leonardo/firmware.hex
Connecting to programmer: .
Found programmer: Id = "CATERIN"; type = S
Software Version = 1.0; No Hardware Version given.
Programmer supports auto addr increment.
Programmer supports buffered memory access with buffersize=128 bytes.
Programmer supports the following devices:
Device code: 0x44
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.00s
avrdude: Device signature = 0x1e9587 (probably m32u4)
avrdude: reading input file ".pio/build/leonardo/firmware.hex"
avrdude: writing flash (14426 bytes):
Writing | ################################################## | 100% 1.09s
avrdude: 14426 bytes of flash written
avrdude: verifying flash memory against .pio/build/leonardo/firmware.hex:
avrdude: load data flash data from input file .pio/build/leonardo/firmware.hex:
avrdude: input file .pio/build/leonardo/firmware.hex contains 14426 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 0.11s
avrdude: verifying ...
avrdude: 14426 bytes of flash verified
avrdude: safemode: Fuses OK (E:FD, H:D8, L:FF)
avrdude done. Thank you.
======================================== [SUCCESS] Took 5.07 seconds ========================================
Terminal will be reused by tasks, press any key to close it.Running the Arduino IDE with sudo resolves the problem, but I'd rather not have to do that.