BMP390 pressure sensor interference with telemetry

[beretta]

Hey all,

I'm trying to find more information about using the BMP390 for my rocket team's payload flight computer. The payload is basically a self-landing UAS. I am designing a 2x2in PCB to include a Teensy microcontroller communicating with a RFM95 LoRa telemetry radio, BNO055 IMU (using the raw readings due to sensor fusion issues), and external connections to two electronics speed controllers, an Adafruit Ultimate GPS, and a single pyro channel. The RFM95 radio is what I am worried about interfering with the BMP. It will be waiting to receive instructions to deploy mid-descent and also potentially transmitting its lat/long.

I can't find much documentation on this subject so I am leaning towards ditching the BMP390 for something like a MS5611 (which doesn't have reliable breakout boards online it seems). Any input would be greatly appreciated!

 

[beretta]

I attached a 3D view of the PCB, the BMP390 is currently mounted on the back.

 

[jderimig]

Why would you want to ditch the BMP390 without evidence that RF interference would be a problem and using a MS6511 won't be?

 

[beretta]

Why would you want to ditch the BMP390 without evidence that RF interference would be a problem and using a MS6511 won't be?

The talks about EMI is just something I have seen in other forum replies against using a BMP388/390 sensor with telemetry. I am ordering parts for a breadboard model very soon so I just wanted to get ahead of the curve if it a well-known problem.

 

[jderimig]

I have to believe n todays "Internet of things" world no advanced semiconductor company (Bosch) is going to have a sensor that is sensitive to RF. I have a BMP688 on tiny board next to a 1W 900mhz radio and there are no issues, Just follow best pcb practices and it should be fine.