MicroPython Forum (Archive)

Hey,

I couldn't figure out how to get my cheapo, old, ebay 20x4 LCD to work with micropython and talk to my ESP32 so I cobbled something together to make it go.

You can find it here:
https://github.com/dork3nergy/lcd_2004

It's dead simple but it works.

Works!

But can you tell me how to run the module locally from a computer, and not upload it to esp32?
And then it gives an error that the module was not found.

I use EsPy and Thonny IDE.

How would you be connecting the I2C directly to your computer? It might work with a raspberry pi. You'd have to connect the I2C to pins 3 and 5 in that case.

Listian wrote: ↑

Thu Apr 16, 2020 1:17 am

Works!

But can you tell me how to run the module locally from a computer, and not upload it to esp32?
And then it gives an error that the module was not found.

I use EsPy and Thonny IDE.

There are means with ampy (Adafruit) that allow you to run code, from your computer, on the ESP32 - look at the "run" option in the ampy documentation or help. I would imagine other development tools have this same capability.

Thanks for putting this together and it worked great for me. I just started getting into the ESP32/MicroPython and had bought a 20x4 LCD display and was struggling to find a module that would work correctly, most of the code out there was for 16x2 displays and of the ones I used they didn't work well. Now to try and figure out how to add the ability to select a specific x or y location on the grid to place a character or begin a string.

Great library for the display it's simple and gets the job done, here I'm using it along with a DS3231 on the I2C bus to show current time and what the alarm is set for. New to MicroPython but loving it, I'm not sure I want to go back to Arduino C anytime soon.