I am trying to use an arduino beetle with a bmp280 pressure sensor. I have connected the SDA and SCL pins and from 5v to a 3.3v regulator into the sensor.
When I use the bmp280 test script with the library, it cannot detect the sensor. I have used an i2c detector example sketch to try and find the address and change it in the .h file however it cannot detect it either. Does anyone have any idea as to why this might be happening. I can send pictures soon to show the situation.
This doesn't look like an original Bosch BMP280. The Beetle also looks like an ultra-cheap Chinese clone with bad soldering. Check if the SDA/SCL pins are correctly connected by a simple setup with two LEDs (D2 and D3).
I guess you used the same 4 wires to connect it, didn't you?