error on raspbery pi

[texrg]

Hello,
I use 128x32 on Raspberry Pi , i get this error:

var/lib/gems/2.1.0/gems/SSD1306-0.6.1/lib/SSD1306/display.rb:144:in pack': no implicit conversion of nil into Integer (TypeError) from /var/lib/gems/2.1.0/gems/SSD1306-0.6.1/lib/SSD1306/display.rb:144:in display!'

I install without any error

gem install SSD1306

Fetching: SSD1306-0.6.1.gem (100%)
Successfully installed SSD1306-0.6.1
Parsing documentation for SSD1306-0.6.1
Installing ri documentation for SSD1306-0.6.1
Done installing documentation for SSD1306 after 17 seconds
1 gem installed

[zeiv]

Hey texrg, do you think you could post your code? Are you creating a new display object with a height of 30?

At a quick glance it seems that this error is being caused because the library expects display heights to be in multiples of 8. I have the 128x64. My thought was the only other option was 128x32, right?

In any case, try setting your height to 32. If your display is actually 30 pixels tall, you might end up having your text cut off a tiny bit, but using 32 as the height should fix the error.

Alternatively you could set the height to 24, but then you would have 6 unusable rows.

[texrg]

128x32 my small mistake

[zeiv]

Did that fix the problem for you?

[texrg]

no

[zeiv]

Shoot. Can you tell me anything more about the error, or provide a code snippet?

[eflukx]

Encountered the same issue. When the height is set to 32 (maybe anything not 64 ?) this happens when initializing the display object. I encountered it when playing around, didn't bother to fix it as I have a 128x64 display.

[paichi81]

I use 128x32 OLED. font_size 2 is OK.

disp.font_size=2 
disp.println "HOGE" # OK
disp.font_size = 1 # BAD