I can't even see where is the sensor of sda and scl here, like I'm done soldering the pc3 and pc4 i thought it was the sensor for it, and i also done connnecting the +4v2 and -4v2 in 5v and gnd and its worked but when i tried to make a code for arduino ide to find when it has a i2c but it shows no device i2c found
Sorry, nothing in your post makes least bit of sense.
For help, start by reading and following the directions in the "How to get the best out of this forum" post.
What i mean is, I can't find the sda and scl sensor in this board like it doesn't have an scl pins or sda, so this must be haven't an i2c?
Are you still trying to read from your blood pressure meter?
Yees, i have a good news the i2c has been detected in my arduino but i don't know how to read the result of my blood pressure to arduino or do you have any code? I'm using arduino uno wifi rev 2
Take a look at how to use I2C and the "wire.h" communications library...
https://docs.arduino.cc/learn/communication/wire/