BME280 Sensor DOA?

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hi all,


i working on little project measure , log temperature, humidity , possibly barometric pressure. decided go bme280 had needed in 1 small module.

the 1 ordered aliex , 1 of little purple modules size of fingernail , has 4 pins on it. power (vcc , gnd) , i2c (scl , sda).

no matter i've tried wont anything.

at first connected circuit i'm prototyping see if played nice rtc have on i2c bus. tried several libraries including adafruit , couldn't bme280 work. got in serial monitor text "bme test" , program went no further. same on libraries tried.

so next tried uploading i2c scanner sketch see if locate address of bme280 both i2c scanner sketches tried hung , didn't scan. tried disconnecting bme280 , running i2c scanners , found 2 addresses rtc.

finally set bme280 standalone , ran i2c scanners , once again hung , didn't scan. in final attempt life out of bme280, tried changing address cutting track between first pad , second , linking second pad third - shorting dso gnd change i2c address. still made no difference. bme280 remains lifeless.

is there can suggest further try or bme280 dead on arrival?


thanks!

does breakout board contain other chips bme280? please post schematic or @ least (sharp) pictures of both sides.

the bme280 has maximum voltage on vcc of 3.6v. if connect 5v of standard uno (you didn't mention type of arduino must have standard model) fry it.

the i2c signals must kept below 3.6v should invest (bi-directional) level converter adapt these voltage levels.


Arduino Forum > Using Arduino > Sensors > BME280 Sensor DOA?


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