Hello RU-vidrs,
I'm testing a BME280 sensor board with an Arduino Nano 5 volt Version 3.0 board.
This Chinese sensor tested A-OK.
I ran the sensor with a 3 volt supply from the Nano, and also using bi-directional level-shifting for the I2C connections. I used two 2N7000 mosfets, and two 10K resistors, as per circuit provided in link below. Note the pins on the this mosfet are S-G-D = 1-2-3.
The sensor was left overnight to "humidify" in the enclosed bottle with a little water.
I used the cactus_io_bme280 library and sample sketch to run the test. Link below.
Test was run with sensor outside and inside the bottle. Reading on serial monitor changed repeatably up and down when sensor was removed and re-inserted.
BME280 board - www.ebay.com/itm/BME280-Digital-Sensor-Temperature-Humidity-Barometric-Pressure-Sensor-Module/113664675124?hash=item1a76f14d34:g:A6cAAOSws7FcdBnj:rk:1:pf:0
Cactus_IO Library and sketch - cactus.io/hookups/sensors/barometric/bme280/hookup-arduino-to-bme280-barometric-pressure-sensor
Level Shifting Circuit - startingelectronics.org/tutorials/arduino/modules/pressure-sensor/
www.hobbytronics.co.uk/mosfet-voltage-level-converter
2N7000 Datasheet - www.onsemi.com/pub/Collateral/2N7000-D.PDF
24 мар 2019
