BME280

[B2CAP-V6]

HI All,

Has anyone ever run the BME280 in hardware with a PIC microcontroller?
I ask because the simulation works perfectly in FC11, but it doesn't work in Proteus.
Thanks in advance for your answers.
Luc

[medelec35]

Hello.
My Advice would be not to test with a third party simulation before posting on the forums.
It's always wise to test on embedded hardware first.

I have a 18F14K22 I can test BME280 on.
Last time I tested BME280 on ESP32 it worked as expected.
I will carry out some tests and let you know how i get on.

[chipfryer27]

Hi

Following on from above, have you asked Proteus as to why it does not simulate on their software? Surely they would be the best people to ask as they wrote the apparently non-functioning software?

Regards

[Steve-Matrix]

In general, simulation within Flowcode (and with other software such as Proteus) is useful to get an idea if the project is working and to quickly experiment without needing to first create actual hardware. But it is not always 100% representative of how a project will work in real life and so there is no substitute to deploying and testing on a physical prototype.

[BenR]

In Proteus does the VDDIO & CS of the BME380 need a connection to the 3.3V supply rail?

[medelec35]

BME280 Working on embedded hardware as expected.

Code: Select all

Temp = 22.780000, Humid = 47.277343, Pressure = 987.909973
Temp = 22.780000, Humid = 47.289062, Pressure = 987.929992
Temp = 22.790000, Humid = 47.299804, Pressure = 987.900024
Temp = 22.770000, Humid = 47.280273, Pressure = 987.890014
Temp = 22.780000, Humid = 47.289062, Pressure = 987.929992
Temp = 22.790000, Humid = 47.298828, Pressure = 987.969970
Temp = 22.770000, Humid = 47.291992, Pressure = 987.909973
Temp = 22.770000, Humid = 47.301757, Pressure = 988.000000
Temp = 22.780000, Humid = 47.288085, Pressure = 987.969970
Temp = 22.770000, Humid = 47.300781, Pressure = 987.940002
Temp = 22.770000, Humid = 47.300781, Pressure = 987.929992
Temp = 22.780000, Humid = 47.301757, Pressure = 987.969970
Temp = 22.770000, Humid = 47.300781, Pressure = 987.929992
Temp = 22.770000, Humid = 47.302734, Pressure = 987.950012
Temp = 22.790000, Humid = 47.290039, Pressure = 987.960021
Temp = 22.780000, Humid = 47.299804, Pressure = 987.929992

The only issue I have spotted with the component which does not affect any of the readings.
It's just a cosmetic issue which I can fix since there are letters appearing between Temperature and Humidity when the component is placed on the 2D panel.

For other flowcode and Proteus uses, can you let us know if Bens suggestions works.
If not, then after reporting to labcenter support, can you please let us know what their solution is.

[B2CAP-V6]

A big thank you to everyone.

Well, I connected (and you were right) VDDIO, SDO, and CSB to the 3.3V rail. It didn't change anything. I forgot to show in my previous post that I do have signals on SDA and SCL.
I haven't heard back from Labcenter. I'm going to try to build a hardware circuit (I'm still in a mess from moving, I have boxes everywhere). Thanks again, Medelec, for doing the test.

[B2CAP-V6]

Hello,
I’m finally revisiting the BME280 topic. I had the PCBs manufactured, but—just like in the Proteus simulation—it isn't working. All readings return 0.
Has anyone here ever used this BME280?

[medelec35]

What about using the LCD as a diagnostic tool.
Print the return value of initialise.
I use the return value for all the components that have them.
Can you try that and let me know what the value is.

[B2CAP-V6]

Good evening Martin,
Using the display as a diagnostic tool is a great idea.
I’m going to name the variable for the BME initialization—for example, `Init` of type `Byte`.
On the LCD, I’ll use `PrintNumber` to display the return value of the BME initialization function.
Is that correct?