Hello ... Such displays are available for example on Aliexpress or eBay from "Surenoo Display". Did anybody test such a display, and in which mode ? And generally speaking which value do You use for I2C pullup's ? Thanks for any answer ...
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Thanks ... I will test and publish the results as soon as I get the component. The only difficulty is that the standard fonts are English and Japanese, so if I wanna use French diacritic lower case chars (é, ô), maybe I will need to create them.
Last edit: Bertrand BAROTH 2022-02-06
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I saw in the LCD_12 section that 2 ways to connect the data lines seem to exist ... If I see "garbage" I will first try this suggested modification and in worse case contact the seller to know how the lines of the LCD are connected to the I2C adapter.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Today I got the mail that the board has been shipped. I will use the old principle : Plug and pray ! At least I have the pinouts both of the adapter and LCD display (look at the datasheet of the adapter, attached), so maybe that I could see the corresponding connections between the LCD and the pins of the SMD interface chip (multimeter ? ) ; and with the datasheet of the IC, I should understand how the systems are connected and if necessary modify the assignments of the pins in the software ... In the worst case and with some "dremelling" and desoldering, I should be able to convert it back to a "parallel" mode display : at least my money won't be completely lost ...
I used an i2c to 16 channel adaptor, l used it to drive 12 servos and it's gcb supported-- PCA9685.
The bought gear I have like a frequency gen is so retro with a 2 line display.
My component identifier testers uses a glcd. GCB supports many. More fun than 2 line.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I admit that a GLCD has really more possibilities, but for my application I need only a text display ! Using a GLCD for this purpose is like taking a dozer to crack peanuts ...
Last edit: Bertrand BAROTH 2022-02-12
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
They look like two modules I got from EastRising LCD a couple of years ago. I think you will be pleasently surprised. They look like modules manufactured by CJMCU ! I've attached a file I used
for testing an 8x2 LCD. Hope this helps .
Cheers
The component tester cos £7 or less. It does electrolytic capacitor ESR is SO useful.
It's got an avr something on board that does everything. Displays like ili9341 are cheap and well supported by gcb.
Anobium has added test pixel cos I just asked him. My more interesting application of using it. https://www.youtube.com/watch?v=SGJFApFqx1Q
Anobium also sorted the ili9341 touch screen capabilities also for the lgt238.
He's a star. All his work, I think it's a well supported cheap display. Needs a few pins but not many.
Every device in my house that uses a display does not use a 2 line lcd.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Bertrand -- get a glcd sir. The ili9341 is well supported by gcb but the ones I use are 3.3V logic . They do need a logic level converter unless you use a pic at3.3v supply or a lgt328 which uses 3.3v logic. Anobium also wrote a xor plot for ssd1306 just cos I asked . How cool is that?
As is this is easy. https://www.youtube.com/watch?v=axHTYdH9WW8
Last edit: stan cartwright 2022-02-12
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Thanks for all answers, but a glcd would only be of interest for me coupled with a touch sensitive function. Unfortunately such devices cost an arm and a leg and I didn't find any powered with 5v (I use ATMega8515 or 162 if necessary), only 3.3v (I looked at Reichelt and AliExpress). Surenoo has several models around 60 Euros but there are no technical details concerning connecting and supply voltage.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Bertrand- When my camera has recharged I'll do a quick youtube vid of ili9341 and the touch demo on a lgtnano328.
The display must have the xpt2046 chip... some don't.
I have 4 of these displays and they all need 3.3V logic so using a ttl converter adds more wiring and looks messy. As I said a pic running at 3.3V will have 3.3V logic. I like the lgt328 as it uses 3.3V logic when powered from usb 5V.
I stripped the touch demo to just drawing small circles. Seeing if the x,y touch co-ordinates were within any boxes on the screen would be easy. That's why I'm recommending this to you.
They are cheap displays. Much cheaper than a Nextion and I think less work to get them going... you have to learn nextion ide.
OK here's the short video https://www.youtube.com/watch?v=4XfjQE5b5bc
Anobium had to do extra work for the ili9341 touch to work with lgt328 as it was too fast for hwspi... but he sorted it so the screen is hwspi , which is fast and the touch uses swspi. Amazing guy.
Last edit: stan cartwright 2022-02-14
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Using an Arduino 328 nano and a logic converter. Messy wiring and not the touch wires connected.
The display works fine with arduino nano/uno 328.
It's twice as fast using a lgt328.
The displays are cheap and well gcb supported. You could make one a fake 2 line display for a "laugh". Thing is they are so versatile with the glcd commands and use few pins imho brill!
I been messing with trig to do dials. Results look ok. 2 line displays are so retro. Can't do out.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I am afraid that this will become a "gaseous plant" ... The thing which bothers me most is the level conversion, despite of the fact that I found some UNIDIRECTIONAL solutions here : https://next-hack.com/index.php/category/electronics-tips/logic-level-conversion/
Finally I think I will stay with my "old fashioned" 4002 display and mechanical push-buttons ! For a time I had even considered displaying numeric values with ... NIXIES ! :)
Last edit: Bertrand BAROTH 2022-02-14
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hello ... Such displays are available for example on Aliexpress or eBay from "Surenoo Display". Did anybody test such a display, and in which mode ? And generally speaking which value do You use for I2C pullup's ? Thanks for any answer ...
Please be specific. Which product? There will be many Surenoo Dispalys.
This one :
https://www.ebay.com/itm/293187612590
The LCD is supported. But as I cannot work out what the I2C interface chip is... no idea. We support two I2C interface chips - is it one of those?
A gamble unless you know the I2C interface chip.
The I2C interface seems to be the (standard) PCF8574T ... i saw the interface alone here :
https://fr.aliexpress.com/item/32918983761.html?gatewayAdapt=glo2fra&spm=a2g0o.9042311.0.0.1d1b6c37Zgf4dl
So, it could be LCD_IO 12
See the Help for LCD_IO 12, that is PCF8574.
And concerning the resistors ?
4k pulls on both i2c lines.
Thanks ... I will test and publish the results as soon as I get the component. The only difficulty is that the standard fonts are English and Japanese, so if I wanna use French diacritic lower case chars (é, ô), maybe I will need to create them.
Last edit: Bertrand BAROTH 2022-02-06
Your issue will be the implementation/connection of the PCF8574 to the LCD. It may not work out of the box but it will be resolvable.
:-)
I saw in the LCD_12 section that 2 ways to connect the data lines seem to exist ... If I see "garbage" I will first try this suggested modification and in worse case contact the seller to know how the lines of the LCD are connected to the I2C adapter.
Your route to sucess.
it will be fun.
Today I got the mail that the board has been shipped. I will use the old principle : Plug and pray ! At least I have the pinouts both of the adapter and LCD display (look at the datasheet of the adapter, attached), so maybe that I could see the corresponding connections between the LCD and the pins of the SMD interface chip (multimeter ? ) ; and with the datasheet of the IC, I should understand how the systems are connected and if necessary modify the assignments of the pins in the software ... In the worst case and with some "dremelling" and desoldering, I should be able to convert it back to a "parallel" mode display : at least my money won't be completely lost ...
:)
Last edit: Bertrand BAROTH 2022-02-08
I used an i2c to 16 channel adaptor, l used it to drive 12 servos and it's gcb supported-- PCA9685.
The bought gear I have like a frequency gen is so retro with a 2 line display.
My component identifier testers uses a glcd. GCB supports many. More fun than 2 line.
I admit that a GLCD has really more possibilities, but for my application I need only a text display ! Using a GLCD for this purpose is like taking a dozer to crack peanuts ...
Last edit: Bertrand BAROTH 2022-02-12
They look like two modules I got from EastRising LCD a couple of years ago. I think you will be pleasently surprised. They look like modules manufactured by CJMCU ! I've attached a file I used
for testing an 8x2 LCD. Hope this helps .
Cheers
Anobium has put much effort into glcd,
Which display is better?
The component tester cos £7 or less. It does electrolytic capacitor ESR is SO useful.
It's got an avr something on board that does everything. Displays like ili9341 are cheap and well supported by gcb.
Anobium has added test pixel cos I just asked him. My more interesting application of using it.
https://www.youtube.com/watch?v=SGJFApFqx1Q
Anobium also sorted the ili9341 touch screen capabilities also for the lgt238.
He's a star. All his work, I think it's a well supported cheap display. Needs a few pins but not many.
Every device in my house that uses a display does not use a 2 line lcd.
Bertrand -- get a glcd sir. The ili9341 is well supported by gcb but the ones I use are 3.3V logic . They do need a logic level converter unless you use a pic at3.3v supply or a lgt328 which uses 3.3v logic. Anobium also wrote a xor plot for ssd1306 just cos I asked . How cool is that?
As is this is easy. https://www.youtube.com/watch?v=axHTYdH9WW8
Last edit: stan cartwright 2022-02-12
Thanks for all answers, but a glcd would only be of interest for me coupled with a touch sensitive function. Unfortunately such devices cost an arm and a leg and I didn't find any powered with 5v (I use ATMega8515 or 162 if necessary), only 3.3v (I looked at Reichelt and AliExpress). Surenoo has several models around 60 Euros but there are no technical details concerning connecting and supply voltage.
Last edit: stan cartwright 2022-02-14
Bertrand- When my camera has recharged I'll do a quick youtube vid of ili9341 and the touch demo on a lgtnano328.
The display must have the xpt2046 chip... some don't.
I have 4 of these displays and they all need 3.3V logic so using a ttl converter adds more wiring and looks messy. As I said a pic running at 3.3V will have 3.3V logic. I like the lgt328 as it uses 3.3V logic when powered from usb 5V.
I stripped the touch demo to just drawing small circles. Seeing if the x,y touch co-ordinates were within any boxes on the screen would be easy. That's why I'm recommending this to you.
They are cheap displays. Much cheaper than a Nextion and I think less work to get them going... you have to learn nextion ide.
OK here's the short video https://www.youtube.com/watch?v=4XfjQE5b5bc
Anobium had to do extra work for the ili9341 touch to work with lgt328 as it was too fast for hwspi... but he sorted it so the screen is hwspi , which is fast and the touch uses swspi. Amazing guy.
Last edit: stan cartwright 2022-02-14
Using an Arduino 328 nano and a logic converter. Messy wiring and not the touch wires connected.
The display works fine with arduino nano/uno 328.
It's twice as fast using a lgt328.
The displays are cheap and well gcb supported. You could make one a fake 2 line display for a "laugh". Thing is they are so versatile with the glcd commands and use few pins imho brill!
I been messing with trig to do dials. Results look ok. 2 line displays are so retro. Can't do out.
I am afraid that this will become a "gaseous plant" ... The thing which bothers me most is the level conversion, despite of the fact that I found some UNIDIRECTIONAL solutions here :
https://next-hack.com/index.php/category/electronics-tips/logic-level-conversion/
Finally I think I will stay with my "old fashioned" 4002 display and mechanical push-buttons ! For a time I had even considered displaying numeric values with ... NIXIES ! :)
Last edit: Bertrand BAROTH 2022-02-14