Implementing Matter weather station using nrf52840DK and Bosch BME280 sensor

[rutwik]

Hi,

I am using nrf52840DK and trying to implement a weather station application using thingy53 application example.
I am using a Bosch BME280 sensor and could read the data from the using I2C.

Now I was integrating it into matter using same DK and BME280 sensor I have done all required changes for my application and tried to build but I got Issue with the RAM.

While build it says RAM overflow by some bytes as i have attached the image below I anyone faced this issue it will be helpful for my implementation.

I want to know do I need add some thing in config file or how can i build this in to flash.

Thanks in advance

[Marte Myrvold]

Hi,

Are you using prj.conf or prj_release.conf as the configuration file when building?
The Matter Weather station, and Matter in general, requires a lot of flash and RAM, so you might get issues running it on the nRF52840 DK unless you use the release configuration. You might also have to make additional changes to reduce the memory footprint further. I recommend going through our Memory footprint optimization guide to see how to reduce ROM and RAM.

Best regards,
Marte

[rutwik]

Hi,

I am using prj.conf while building my application.

I will go through the footprint optimization and if I couldn't solve it i will get back you.

Thanks for the quick reply.

[Marte Myrvold]

Hi,

Please try using prj_release.conf, as that should also reduce the memory footprint.

Best regards,
Marte

[rutwik]

Hi Marte,

I have tried using prj_release.conf and the i could build the code and also flashed it into the DK but i could see any error msg or the board doesn't give any data out.

previously I could get the data from the sensor from the dk.

but once i have tried to implement it in matter the DK doesn't show to connet via BLE.

The only output msg i get in the serial monitor is booting zephyr version.

I don't see any LED either on the board after flashing the code.

is there anything I am missing.

Thanks.

[Marte Myrvold]

Hi,

The release config turns off logging, so it makes sense that you do not see any serial logging from the device. However, you should still be able to connect to the device over Bluetooth and the LEDs should still be working. You can try using prj.conf and instead reduce the footprint according to the Memory footprint optimization guide.

Best regards,
Marte