Comments on: [SOLVED] Could not find a valid BME280 sensor, check wiring!

By: Jim

Jim — Sun, 10 Nov 2024 01:04:33 +0000

In reply to herraHoo. Nice job! It showed me I received a BMP280 and not the expected BME280

By: CEMOI

CEMOI — Fri, 02 Jun 2023 16:09:17 +0000

I have used the solution provided by Ralph McCleery above, meaning editing the “Adafruit_BMP280.h” file in order to twist the (0x77) and (0x76) addresses, and it worls perfectly !

If someone could test other(s) librairy(ies) that would work without any modification, it would be simpler in case we use different sensors (originals and clones) with the same program…

Amongst the possible alternatives to the “Adafruit_BMP280” library, I have been told that the “cactus.io” and the “Sparkfun” (it works with a BME280, but does it work with a BMP280 ??) have a better reputation than the Adafruit_BMP280.

Thank for sharing,
Michel

By: Massimo

Massimo — Fri, 28 Apr 2023 17:27:43 +0000

Hello, thank you so much. Finally, I discovered why the BME 280 wasn’t working. It was a fake !
Regards.

By: David

David — Sat, 01 Apr 2023 14:27:28 +0000

I found I had a problem getting reliable humidity readings (Kept returning 82%). It turned out the fix for me was to lower the I2C bus speed . Originally I had it set to 400K, I dropped it to 20K and things worked normally. I was connecting to a Pico W and using micropython.

i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=20000)

Cheers David

By: Sara Santos

Sara Santos — Fri, 24 Mar 2023 00:07:23 +0000

In reply to NATT.

Hi.
I didn’t know about that.
Thanks for sharing.
Regards,
Sara

By: NATT

NATT — Thu, 23 Mar 2023 23:43:48 +0000

I have found that some bmp 280 boards do not have the required 4k7 pullup resistors on board. Particularly ones from AZ-Delivery! I have a couple of these and wondered why they worked with a raspberry pi pico dev board and not my ESP32 boards. It turned out the pico board had the built in pull ups.

By: Lee

Lee — Thu, 03 Nov 2022 23:06:35 +0000

I got caught out with the fake BME280. It was a BMP280 clearly marked as a BME280.
If the AdafruitBME280 library is used, the sketch will NOT find a BMP280, whereas some of the other BMP280 libraries will.
In the ESP32 gauges sketch changing to the BMP280 library , the fake BME280(BMP280) was found OK.

By: Lee

Lee — Thu, 03 Nov 2022 22:10:09 +0000

In reply to Ralph McCleery.

Alternatively, you can connect SD0 to Gnd to flip the device address to 0x77.
I can get my devices to work perfectly on ESP8266 but not on ESP32.
Wiring is OK, double checked with a CRO!
I will investigate other libraries, mentioned further down this page.

By: Ivan

Ivan — Mon, 08 Aug 2022 00:19:56 +0000

In reply to Bruce.

I think I’m facing the same problem, judging by the date it might even be the same batch haha. I ordered two BMP280 sensors from a chinese supplier on aliexpress and i’ve spent 2 days trying to make them work but they don’t even show up in the i2c scanner. Looking at my sensors and the ones online, I think they might indeed have been soldered backwards…
I’m almost sure it is also backwards in the shop page, you can clearly see that the pin soldered to the i2c address selector is 1-GND (the one next to the vent hole) instead of 5-SDO (the opposite pin), which according to the datasheet must be pulled down to ground or to vcc to select the last I2C address bit.

By: Florian Schmid

Florian Schmid — Sat, 30 Jul 2022 13:02:28 +0000

Hi,
I can’t get the version to run.
When compiling, various error messages come up. What am I doing wrong?
Can you help a (beginner) a little further?
Thanks!

Excerpt from error messages:
C:\Users\Florian\Documents\Arduino\I2C_scanner\I2C_Scanner.ino:129:31: note: in expansion of macro ‘HDC10xx_Device_ID’
uint16_t chip_id = Read16(HDC10xx_Device_ID, address); // get chip ID
^~~~~~~~~~~~~~~~~
I2C_Scanner:129:14: error: unused variable ‘chip_id’ [-Werror=unused-variable]
uint16_t chip_id = Read16(HDC10xx_Device_ID, address); // get chip ID
^~~~~~~
cc1plus.exe: some warnings being treated as errors
Bibliothek Wire in Version 2.0.0 im Ordner: C:\Users\Florian\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.4\libraries\Wire wird verwendet
exit status 1
unused variable ‘chip_id’ [-Werror=unused-variable]