How can i use an BME280 I2C Sensor?

[martinmmi]

Hello, iam martin and new with the t-display-s3.

My Question: How can i use i2c on t-display-s3? In the almost libs you have to assign the pins from the controller.

I read in the manual from t-display-s3, that i can use every gpio as i2c pins. But how does it work with the pin assignment?

Maybe with the adafruit bme280 lib and Adafruit_Sensor library? https://randomnerdtutorials.com/bme280-sensor-arduino-pressure-temperature-humidity/

-Martin

[teastainGit]

I am surprised that the example doesn't include Wire.begin(SDA, SCL); On the LilyGO T-Display S3 the 4pin JST connector beside the USB is

SDA pin 43 and SCL pin 44. So you need to add this to your setup: Wire.begin(43, 44); //SDA, SCL You can use almost any two pins but this is very convenient! I made a GitHub repository that has a simple example of I2C temp sensor, but a different type, just a demo: https://github.com/teastainGit/LilyGO-T-display-S3-setup-and-examples See the HotHead_temp_sensor example. -Terry

[martinmmi]

Oh wow. Thanks!! Which advantage has this connector? For me, its realy impractical because i cant can soldering directly and also cant use the standard back arduino pins.

[teastainGit]

There are several companies that make sensors and boards that use this JST connector. I have drawers full of cool sensors, etc to learn and program, ready to plug in. The LilyGO T-Display S3 use the small JST 1.0 used by Adafruit as "STEMMA QT" and Sparkfun with their compatible QWiiC line of products. M5Stack has a really good line of controllers and sensors, but they use the larger JST called Grove, also used by the Seeed company.

So, my point is that I have not used a white plastic breadboard for years! Worth considering for future hobby projects. But as you said any two pins can be I2C, you just need to declare them with Wire.begin()

[lewisxhe]

If you still have problems, please open it again