Ive been trying to get some I2C displays I purchased on Amazon and was not able to make them work no matter what I tried. I used different libraries but nothing is letting these displays show anything. I tried with ESP8266 as well as with ESP32. I also purchased a few Ardiono boards but almost giving up on this. Any help would be appreciated.

Well that is so sad, what you`re going to do now? :smiley:

Type display. Libraries? Code? Schematic?

Your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advice on) your project :wink: See About the Installation & Troubleshooting category.

[image] logichc: I tried with ESP8266 as well as with ESP32. Try with UNO which, I am sure, you have.

[image] logichc: Any help would be appreciated. Start with an I2C scanner to see if a display is detected and if so, what address it has. Only connect 1 display at a time.

Yes I did that and do see 1 device connected with address of 0x3C. That's where I am stuck and not able to proceed further.

yes you are correct. I do have a box of UNO's (for various planned and unplanned projects). Shall try that today. Good idea.

I will be trying a few more ideas, some of which from the great people who are giving me suggestions on here and some my own, and if all else fails, will return them as the seller was not able to help me with it other than offering a full refund if I returned them and I already got a return label yesterday. I am hoping I do not have to use the return label and rather use the LCDs as I really was hoping to use them on a multitude of projects.

here is my code that is not working. I did a scan to find that I do see 1 device and its hex code is 0x3C, hence I put that in the code below. #include "Wire.h" #include "LiquidCrystal_I2C.h" #include "thingProperties.h" void setup() { Serial.begin(9600); delay(1500); initProperties(); ArduinoCloud.begin(ArduinoIoTPreferredConnection); setDebugMessageLevel(2); ArduinoCloud.printDebugInfo(); Serial.println("Setting up and will print on LCD now"); LiquidCrystal_I2C lcd(0x3C, 20, 2); lcd.init(); lcd.backlight(); lcd.setCursor(1, 0); lcd.print("This is"); lcd.setCursor(1, 1); lcd.print("Working"); } void loop() { ArduinoCloud.update(); }

I dont know how to draw and post the schematic on here. I can draw one up with maybe mspaint (I am using windows), but would like to know what you guys use so i can do a better job. Thanks.

I2C Display not working no matter what I do

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johnerrington December 27, 2022, 7:27am 20

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I2C Display not working no matter what I do

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