OpenScale is outputting garbage to serial monitor

Development Boards Arduino
1

Hi! I have been trying to set up an OpenScale board to use for load cell readings. I’ve been following along with the hookup guide here: OpenScale Applications and Hookup Guide - SparkFun Learn. I am currently trying to open the settings for the board and start calibrating it.

The OpenScale right now is outputting garbage to the serial monitor.

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Additionally, sometimes it gives me an error when I try to upload the OpenScale.ino script to the board, saying “avrdude: ser_open(): can’t open device “\.\COM6”: Access is denied.”

I have uploaded the most recent firmware to the board and followed all the steps (installing libraries, pushing the OpenScale.ino script to the board, etc) in the hookup guide. I have confirmed that my serial monitor drop-down baud rate is set to 9600 to match the OpenScale settings. I don’t have any other applications using or referencing the COM port where the board is connecting to my laptop, so I am not sure what the issue is there with the access denied. I’m not sure where the issue is; any help is appreciated!

2

You might have accidentally changed the baud rate on the board. There’s a blurb in the directions that might help:

If you get OpenScale into an unknown configuration you can reset the board to safe defaults. Power down OpenScale, attach a jumper from RX to GND on the serial connector, then power up OpenScale. You should see the status LED blink rapidly for two seconds then at 1Hz. This indicates OpenScale has been reset to 9600bps. This will also reset all system settings to safe defaults.

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3

That worked, thank you!

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