As it works with Arduino IDE for 0x27 and the sniffer states 0x27 just change the address within LCD properties to 0x27. It will allow you to do that, then it will instantly change it to 39 = the decimal equivalent. The other thing I would recommend is changing the Display from LCD I2C (LCM1602) to...

I found a sniffer type code for Arduino IDE and this is what i get.

Just in case it helps... My Arduino IDE code sketch that is working on current setup... Maybe it can help? #include <Wire.h> #include <LiquidCrystal_I2C.h> // Set the LCD address to 0x27 for a 16 chars and 2 line display LiquidCrystal_I2C lcd(0x27, 16, 2); void setup() { // initialize the LCD lcd.be...

I even tried another LCM1602 Board and sniffed the same result.

If the wording is wrong after recompiling then the hardware has not been updated with the correct flwochart. If the address is wrong then there will be a row of squares as the LCD has not ben correctly initilised. As a sanity check, you can can confim the address is correct by using my I2C sniffer ...

I have now swopped out the arduino boards and changed the wires. And still....

Does this look right? Title: Description: Device: ARD.ATMEGA.ATMEGA328P Generated by: Flowcode v9.2.0.33 Date: Friday, October 29, 2021 19:56:46 Users: 1 Registered to: Licence key: NOT FOR COMMERCIAL USE https://www.flowcode.co.uk Compilation is up-to-date Linking is up-to-date Using FCD settings f...

if i open arduino IDE now and program it, it then shows me "Hello World" That is excellant news. Thanks for letting us know. I'm very sorry, i didnt mean it that way. My dad has been bragging about flow code since flowcode probably 1.0 I decided i have sometime and wanted to try it out......

No Sorry i cant.

if i open arduino IDE now and program it, it then shows me "Hello World"

Hi Sorry, I accdently deleted your post. But I did read it. I was trying to delete my duplicated post. As you are using the PCF8457AT and A0, A1 & A2 have no solder shorts on them then the address is 63 You have it as the defaut 32. You will need to change the address within component propertie...