avrdude port differs from $MONITOR_PORT

[ermyril]

Hello! When I'm trying to upload sketch using makefile, avrdude couldn't connect to the arduino, because I assume that it uses $MONITOR_PORT as a port in avrdude

make generates this command: avrdude ... -P /dev/cu.usbmodemMIDI1 and then avr couldn't connect to the programmer

however, arduinoIDE passes that parameter like that avrdude ... -P /dev/cu.usbmodem1401 and uploads successfully

ls /dev | grep cu.usbmodem gives me only cu.usbmodemMIDI1

I tried to use $ARDUINO_PORT, setting $ISP_PORT and trying make ispload but it's not helping.

[tuna-f1sh]

I don't understand the problem with Arduino Makefile here, the Arduino IDE is uploading successfully to a port that does not exist?!

ls /dev | grep cu.usbmodem gives me only cu.usbmodemMIDI1

If the correct port is /dev/cu.usbmodem1401 you should be able to set it using MONITOR_PORT = /dev/cu.usbmodem1401 but it isn't going to work if the port is not present!

[ermyril]

Exactly, arduino IDE uses cu.usbmodem1401 but only when it calls avrdude, in other places it uses usbmodemMIDI1, and I believe that it IS the same port basically, because usbmodem1401 is not present on my system at all (hence makefile will fail immediately if I'll set MONITOR_PORT = /dev/cu.usbmodem1401). I think that it's some strange encoding magic or so. It maybe some OS specific thing (I've got that error on macos mojave).

Surely it's a very strange behaviour, but arduino IDE somehow aware of it.

I'll post logs from makefile and from IDE when I'll get home. Also I'll try to test it on linux.

[ladislas]

On macOS I use MONITOR_PORT = /dev/cu.usbmodem* or MONITOR_PORT = /dev/tty.usbmodem* and it works fine with avrdude.

[tuna-f1sh]

What device are you using? It sounds like the bootloader is Caterina or similar whereby it enters a bootloader by toggling the baud rate. The port may enumerate as a different path once in the bootloader:

• /dev/cu.usbmodem1401 is the bootloader port.
• /dev/cu.usbmodemMIDI1 is the application port.

Try using ard-reset-arduino with the --catalina flag and see whether usbmodem1401 appears.

If it does, add ARD_RESET_OPTS += --caterina to your Makefile.

[ermyril]

@tuna-f1sh The device is a clone of an arduino pro micro.

Yup, caterina appears to be the case, when I've run ard-reset-arduino, usbmodemMIDI1 dissapeared andusbmodem1401 showed in /dev/ added ARD_RESET_OPTS += --caterina, but it generates /usr/local/bin/ard-reset-arduino --caterina --caterina /dev/cu.usbmodemMIDI1 (so it was detected automatically) and still could not connect to the device.

@ladislas, thanks! I tried it but still with no luck :(

Here is complete logs from running make upload - https://pastebin.com/u64hF5tF Here is a log from arduino IDE - https://pastebin.com/7z8D99J0

And my makefile looks like this

ARDUINO_VERSION = 10801
ARDUINO_DIR   = /Applications/Arduino.app/Contents/Java
BOARD_TAG    = micro
MONITOR_PORT = /dev/tty.usbmodem*
ARD_RESET_OPTS += --caterina

include /usr/local/opt/arduino-mk/Arduino.mk

Seems that its related to the issues #127 and #506

[Alexlill]

I was torn between making a new issue for my case or necro-ing this thread, but I would have ended up with the exact same title and felt like it would have been spam. So, here I am:

Similarly to the OP, I'm ending up with the wrong ports relative to my MONITOR_PORT, my issue being that I'd like to make and upload the same .ino target for multiple different Arduinos.

Ex: I have verified that ttyACM0 and ttyACM1 are both present and function as intended. My makefile: MONITOR_PORT = /dev/ttyACM0 works as intended and uploads to the Arduino on port ttyACM0. My makefile: MONITOR_PORT = /dev/ttyACM1 eventually has the make output show ard-reset-arduino /dev/ttyACM0 and avrdude ..... -P /dev/ttyACM0, and thus fails to upload to the Arduino on ttyACM1.

I don't know if this is a common use case, but I thought I'd post anyways in case I was messing something up along the way.

EDIT: My quick guess is that it has to do with the wildcard starting here, but I'm not sure why you'd be looking for a port when you already have it specified.