thingy91X (nrf5340) access to environmental sensor

[Lvrk]

Thingy91I:  Is there a sample project accessing the environmental sensor (BME688) ?

If not, perhaps a project to access a device via I2C by the nrf5340 SIP.

A related question: how can rnf9151 and rnf5340 exchange data ?

[Hakon]

Hello,

Thingy91I:  Is there a sample project accessing the environmental sensor (BME688) ?

You can use the environmental module of the asset tracker template; https://github.com/nrfconnect/Asset-Tracker-Template/blob/main/docs/modules/environmental.md 

A related question: how can rnf9151 and rnf5340 exchange data ?

You can check this out;  https://devzone.nordicsemi.com/f/nordic-q-a/118937/thingy-91-x-with-external-spi-slave-possible  

[Hakon]

Also, you can use the sample found here; https://github.com/nrfconnect/sdk-nrf/tree/main/samples/zephyr/sensor/bme680 

By just adding

&bme680 {
	status = "okay";
};

to overlay file.

[Lvrk]

Thanks. This is similar to the sample project in NRF Connect Fundamentals.
Functionally we need the following:
- Do a connectable BLE broadcast of sensor data.
- Take some actions on connect.
- Occasionally send data over NB-IOT, WIFI, LT-M or similar.
So we looked at thingy91X as a potential hardware base.
The BLE part and reading a sensor (BME680 or other on the I2C bus) we already did on nrf54l15 so that must be similar.
The BLE also does a scan to collect data.
Several questions:
- how to connect external sensor on I2C bus of nrf5340 on thingy91X
- how can the nrf5340 send/receive data with nrf9151
I have not seen a solution to the last point.

[Hakon]

Lvrk said:

- how can the nrf5340 send/receive data with nrf9151
I have not seen a solution to the last point.

You need to reread the first reply I sent you then. If you check the forum post I linked to, it will tell you that any communication between the nrf9151 and nrf5340 happens with the connectivity bridge. The connectivity bridge is an application that you can flash to the nrf5340 and takes care of all communication between the MCUs.