I used the continuity setting on my multi-meter, they are all fine
Connect the resistor to ground and see if it reads 0V.
If it does, then I'm stumped as to what is wrong.
It does
have you any other I2C devices you could scan?
No I don't 
Is it a genuine Arduino UNO or a clone.
If a clone, which brand?
Show a picure of the UNO
It's a clone, I don't know which brand and there's no brand name on the arduino. I bought it years ago, I'll try and figure out which brand it is. Nothing on the back of the UNO
Can you read a number on the Big IC?
Did the I2C ever work?
The number on the big IC is
35473D
ATMEGA328P U
1751 GVK
The I2C never worked, always got stuck
Hi,
When using I2C, have you got 4K7 pullup resistors on each of the SDA and SCL lines to 5V?
Check tha you have SDA/A4 SCL/A5 .
Tom...
So you need to buy an new UNO.
Which one should I buy to make sure that I don't run into the same problem again. Is there anything I should look out for?
Well you could buy a real Arduino UNO.
I have a Sunfounder brand and never had any problems.
Maybe others here on the forum can list boards they have used.
probably worth getting a Mega more memory and IO facilities or move to newer technology such as ESP32 which has onboard WiFi, Bluetooth Classic and BLE
the Pololu TOF sensors such as the VL53L0X work OK with the ESP32
Problem was with the arduino Uno that I was using, tested it out on a fresh arduino pro micro, works now. Thanks
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