what voltage bme280 should i buy for using with ESP32 Q&A Forum › what voltage bme280 should i buy for using with ESP32 0 Vote Up Vote Down Richard Funnell asked 3 years ago 3 Answers 0 Vote Up Vote Down Sara Santos Staff answered 3 years ago Hi. BME280 that works with 3.3V, preferably. Regards, Sara 0 Vote Up Vote Down Richard Funnell answered 3 years ago Does it matter how many pins is on the unit 4 or 6 ? Richard 0 Vote Up Vote Down Sara Santos Staff answered 3 years ago Hi. Both will work fine. The one with 6 pins allows SPI and I2C communication. The one with 4 pins only allows I2C. Usually, we just use I2C communication with the BME280. So I would go with the one with 4 pins. Regards, Sara