ArtSuzhou

I'm not a fire fighter but I think they need to be in full gear when the truck pull out the station. I'm sure there are many other alternative solution, here I just want to show what can be done with all the inexpensive parts available on the open market (no personalized PCB etc.) and a design solution that works.

Looks there are some grammatical errors in your sketch. Did you try to download the sketch again? The article hasn't changed since it was published.

Thanks for your comments. The purpose of this project is to accurately measure the actual filament usage, including the retraction. However with some additional programming it can also act as a filament sensor to detect breakage or jamming. At the time the marlin has not incorporated rotary sensors.

I commented following, and it works://#define double_buffer

Great job, is it possible to share the STL file for the housing?

No

According the the error log you sent me:"Multiple libraries were found for "LiquidCrystal_I2C.h"Used: /Users/Ron/Documents/Arduino/libraries/LiquidCrystal_I2C-1.1.2exit status 1"You used a wrong library LiquidCrystal_I2C-1.1.2, please delete this library and install the correct one.

This is problem of library you have currently in your arduino library folder. the "no matching call" error mostly arrive because the function you are trying to access is not defined in the library you have right now used. Actually there are multiple libraries available with the same name as "LiquidCrystal_I2C.h" or sometime It is older version of library installed, so when people use wrong libraries they get these library.The simple solution for this problem is to install correct library and delete existing libraries for i2c 16x2 LCD. I have used one library which solved my problem you can try this one. the link is https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library

There's no rotary encoder inside optical mouse

Great project. How did you manage to embed the graphics inside the article?

The roller size is determed by experiment for best performance and size. The mouse sensor resolution is known so you can calculate mm/step. Then use the calibration factor in the software to address the error.

The Uno board is powered by the breadboard DC power supply. Pay attention to the polority of wiring!

Sorry the case was designed in 123D which is no longer available. It's fairly easy to modify the STL file to fit your needs.

I just tried the sketch can be downloaded without issue. It can be opened by Arduino IDE, or a text editor.

Is your project based on the weather station made by Squix? Please acknowledge the original author, at least for the fritzing diagram! https://github.com/squix78/esp8266-weather-station...

Both software and handware mouse emulator is available. This is more suitable to be used when you don't want to take the risk using none-authorized software or hardware which is not uncommon if you work with sensitive information.

I haven't tried but would think the sketch should work on a nodemcu as it is.

I haven't tried but would think the sketch should work on a nodemcu as is.

ATtiny85 can do the same. But that requires installation of mouse driver which in some cases are not permitted. In some places plug in such an USB device will trigger an red alarm.

Absolutely ATtiny85 can do it. But the sketch needs to be rewritten since the ATtiny85 use different libaries.

Any PS/2 mouse should suffice. The particular model I used was made by Logitech and pretty much the universal design underhood of HP and Dell mice. You may need to change the sensor module design to fit the different circuit board if use different brands, or simply adds wires to the IR sensors.