# Problems with BME280 Sensor

**URL:** <https://forum.sensor.community/t/problems-with-bme280-sensor/170>\
**Category:** Uncategorized\
**Created:** [January 3, 2021, 5:19pm UTC](https://forum.sensor.community/t/problems-with-bme280-sensor/170 "2021-01-03T17:19:35Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![lozy](https://forum.sensor.community/letter_avatar_proxy/v4/letter/l/9dc877/32.png) [@lozy](https://forum.sensor.community/u/lozy)\
**Post date:** [January 3, 2021, 5:19pm UTC](https://forum.sensor.community/t/problems-with-bme280-sensor/170/1 "2021-01-03T17:19:35Z")

</div>

Hi everybody,

I connected all the parts as descriped in the instructions. The WiFi is connected and sends data. Also I can see the PM measurements from SDS011 online. The BME280 somehow does not deliver data.

Is there any possibilty to debug the sensor in detail? I doublechecked the wiring and replaced the wires itself, but nothing helped. I dont know if my soldering is good enough or if I created some cold solder joints. Or is the sensor broken?

The Arduino Output in Serial Monitor is in the picture. I set the DEBUG to 5 in ext\_def.h and recompiled.

My Node MCU has the ID …

Thanks for your reply and kind regards  
Florian

 ![serialout](https://forum.sensor.community/uploads/default/original/1X/db144135efd28c9a368e7471aab02a5af65af0af.png)

---

<div class="post-metadata">

**Author:** ![Denis](https://forum.sensor.community/letter_avatar_proxy/v4/letter/d/5e9695/32.png) [@Denis](https://forum.sensor.community/u/Denis)\
**Post date:** [January 3, 2021, 5:56pm UTC](https://forum.sensor.community/t/problems-with-bme280-sensor/170/2 "2021-01-03T17:56:10Z")

</div>

Have you selected BME280 and not DHT22 in the sensor’s configuration menu?  
According to your logs device tryes to read DHT22 instead of BME280…

---

<div class="post-metadata">

**Author:** ![lozy](https://forum.sensor.community/letter_avatar_proxy/v4/letter/l/9dc877/32.png) [@lozy](https://forum.sensor.community/u/lozy)\
**Post date:** [January 3, 2021, 6:55pm UTC](https://forum.sensor.community/t/problems-with-bme280-sensor/170/3 "2021-01-03T18:55:52Z")

</div>

Thank you for your quick reply!

Where can I select this? In the code there appears some json file which I can not find.  
When I select “latest\_de\_BMX280.bin” in the flasher the output shows the following picture:

 ![serialout2](https://forum.sensor.community/uploads/default/original/1X/92fabff59201553b7b1a90f3e129b6448ae7eddb.png)

---

<div class="post-metadata">

**Author:** ![Denis](https://forum.sensor.community/letter_avatar_proxy/v4/letter/d/5e9695/32.png) [@Denis](https://forum.sensor.community/u/Denis)\
**Post date:** [January 3, 2021, 8:07pm UTC](https://forum.sensor.community/t/problems-with-bme280-sensor/170/4 "2021-01-03T20:07:35Z")

</div>

You need to locate station IP address in your local network.  
It might (but not 100 percent) also be accessible using the following address:  
[http://airRohr-ХХХХХХХ.local](http://xn--airRohr--f4gaaaaaa.local)  
Where ХХХХХХХ is the ID of your NodeMCU.

Also see section:

> **[Build your own particulate matter sensor.](https://sensor.community/en/sensors/airrohr/)**

---

<div class="post-metadata">

**Author:** ![lozy](https://forum.sensor.community/letter_avatar_proxy/v4/letter/l/9dc877/32.png) [@lozy](https://forum.sensor.community/u/lozy)\
**Post date:** [January 3, 2021, 11:01pm UTC](https://forum.sensor.community/t/problems-with-bme280-sensor/170/5 "2021-01-03T23:01:43Z")

</div>

Ok I got it. I erased the flash and started over with the config of the sensor. In the from you mentioned “sensor config” the BME280 was already selected as default. But I deactived the “auto update” function and flashed the above mentioned binary “latest\_de\_BMX280.bin”.  
Now the sensor sends all data properly .

Thank you very much for your help!