OLED 2.42"

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-macke-
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OLED 2.42"

#1 Post by -macke- » 19 Apr 2017, 16:04

Hello!

Has anyone tried this OLED: https://www.aliexpress.com/item/Wholesa ... sstype=600

I cant get it work. Nothing happens when I tired it :(

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toffel969
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Re: OLED 2.42"

#2 Post by toffel969 » 19 Apr 2017, 16:08

-macke- wrote:
19 Apr 2017, 16:04
Hello!

Has anyone tried this OLED: https://www.aliexpress.com/item/Wholesa ... sstype=600

I cant get it work. Nothing happens when I tired it :(

Its because it uses an different controller IC( SSD1309 vs SSD 1306). The OLED plugin has to be adapted, search the forum, somebody else was successful. You will however need to compile your own version of esp easy
Domoticz on Raspi 2 -- 14 ESP units (hacked Sonoff,NodeMCUs, Wemos, self-built units) running with RC140- Mega 2.0.0 dev8

-macke-
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Re: OLED 2.42"

#3 Post by -macke- » 20 Apr 2017, 13:02

Thanks for your answer, that explains why it don´t work.

I searched the forum but could not find a solution. Anyone else how have managed to get this OLED to work?

Grumpf
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Re: OLED 2.42"

#4 Post by Grumpf » 06 May 2017, 00:15

Nope but keep me posted. :oops:

costo
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Re: OLED 2.42"

#5 Post by costo » 13 May 2017, 23:56

-macke- wrote:
19 Apr 2017, 16:04
Hello!

Has anyone tried this OLED: https://www.aliexpress.com/item/Wholesa ... sstype=600

I cant get it work. Nothing happens when I tired it :(

I use exactly the same 2.42 display with ESPEasy for some time now.

You have to prepare the board before it will work:
Remove R17 and place it on position of R15
Solder a short or 0 ohm on position R13
Solder a short or 0 ohm on position R18 or connect the CS pin to ground
Connect the OLED display to the ESP with Gnd, 3.3V, SCL and SDA
also connect the RES pin of the OLED display to the ESP_reset_pin. (or 3.3Vcc)

If you do not connect the CS pin to ground and the RES pin to RST the display will stay dead.

The Oled uses the normal address 3C and works perfectly well with the standard OLED SSD1306 plugin.

It looks like the controller on this display board is NOT a SSD1309 despite what the info says.
I tested the OLED with the U8G2 library on a Arduino and the best results I got with a SSD1306 constructor, using a SSD1309 constructor will give ghosting on the first 2 columns

Image

3 Oled´s left the small 0.96´ SSD1306 Oled , in the middle the 1.3´ SH1106 Oled and on the right the 2.42´ SSD1306 Oled.
All 3 are working well but for the 1.3´ I had to change 2 bytes in the source code and recompile it.

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Re: OLED 2.42"

#6 Post by -macke- » 15 May 2017, 23:00

Thanks for your awnser. I could now find the display in ESP Easy and I got some light. But I could not put back 17 to R15.. it was to smal.. how did you managed that?

costo
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Re: OLED 2.42"

#7 Post by costo » 17 May 2017, 11:02

-macke- wrote:
15 May 2017, 23:00
Thanks for your awnser. I could now find the display in ESP Easy and I got some light. But I could not put back 17 to R15.. it was to smal.. how did you managed that?
Indeed the 0603 SMD resistors are extremely small but you have to remove R17(4k7) and solder a resistor with a value between about 1k and 10 k on the place of R15 otherwise the display might not be recognized as I2C.
The first time while desoldering R17 I lost it ,( never saw it again :? ) , I had some 0603 smd 4k7 resistors in stock so used a I new one, using a soldering_iron with a small point, a tweezer and soldering flux.

(p.s. if you live in my neighbourhood you can get yourself a new 4k7 smd from me or else you order them in China https://nl.aliexpress.com/item/100pcs-l ... ee89881dac)

totof60
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Re: OLED 2.42"

#8 Post by totof60 » 18 May 2017, 09:42

I buy this one http://www.wide.hk/index.php?route=prod ... duct_id=67

And no need soldering , work fine

costo
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Re: OLED 2.42"

#9 Post by costo » 18 May 2017, 14:09

totof60 wrote:
18 May 2017, 09:42
I buy this one http://www.wide.hk/index.php?route=prod ... duct_id=67

And no need soldering , work fine
Yeah that I2C-only OLED is perfectly fitted for use with ESPEasy.

The other OLED that me and macke use can also be used with the SPI bus which is , in theory , much faster. For me that was the reason to choose for that one, so I can use it in SPI projects too.
But the price of these 2.42 oled´s is relatively high, they must become much cheaper than more people will want to use them.

-macke-
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Re: OLED 2.42"

#10 Post by -macke- » 19 May 2017, 09:28

Thanks for all your help Costo!

Thanks Toffle for the tips about the other OLD aswell :)

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grovkillen
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Re: OLED 2.42"

#11 Post by grovkillen » 19 May 2017, 09:34

costo wrote:
13 May 2017, 23:56
You have to prepare the board before it will work:
Remove R17 and place it on position of R15
Solder a short or 0 ohm on position R13
Solder a short or 0 ohm on position R18 or connect the CS pin to ground
Connect the OLED display to the ESP with Gnd, 3.3V, SCL and SDA
also connect the RES pin of the OLED display to the ESP_reset_pin. (or 3.3Vcc)
Great info! I got this OLED like half a year ago and only switch the R17 with R15.. did not short/bridge the other positions and the i2c scanner went bananas. I just left it at that. I will use your info and hopefully get it up and running. Thanks! :)
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zsolex
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Re: OLED 2.42"

#12 Post by zsolex » 10 May 2019, 16:10

Hi,

I have following model:
I would like to use it I2C mode therefore
I have
* moved R4 to R3
* R5 short

Connectd via Wemos D1 mini
GND, VCC, SDA, SCL, RES to VCC, CS to GND


With I2C scanner I get only "Unknown error at address xx" for every address.
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Abdelabdel
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Re: OLED 2.42"

#13 Post by Abdelabdel » 21 Jun 2019, 00:10

Hi
You must connect CS with DC and strap R7

Abdelabdel
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Re: OLED 2.42"

#14 Post by Abdelabdel » 21 Jun 2019, 09:39

IMG_20190621_093711.jpg
CS and DC to ground via strap
IMG_20190621_093711.jpg (721.85 KiB) Viewed 1527 times

dereks
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Re: OLED 2.42"

#15 Post by dereks » 24 Aug 2019, 14:57

Hi

I have moved/replaced resistor R3 to R4, strapped R5 and R7, connected DC and CS to ground and connected RES to Vcc. My i2c scanner either reports "No I2C devices found" or "Unknown error at address 0x..". If I unplug the display and pop in one which is only an i2c device, it picks up the device at address 0x3c so I know the i2c wiring is OK.
back.jpg
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Sometimes the display shows some content at startup which I've gather from some reading could be a timing issue. I've tried connecting RES to an IO PIN and keeping it low for a fraction of a second at startup and then keeping it high. No luck.
sporadic_at_startup.jpg
sporadic_at_startup.jpg (1.86 MiB) Viewed 727 times
Any suggestions would be highly welcome.

Thanks in advance

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budman1758
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Re: OLED 2.42"

#16 Post by budman1758 » 24 Aug 2019, 17:50

connected DC and CS to ground
Did you try connecting them together but NOT to ground?
"The glass is twice as big as it needs to be".

dereks
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Re: OLED 2.42"

#17 Post by dereks » 25 Aug 2019, 11:38

I did. I then either get the screen showing either the above picture or flashing a kind of "snow". The pic below is not 100% what is visible to the eye.
white_snow.jpg
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