Sub 1GHz or other connectivity

[Guy Dillen]

Posted on February 24, 2017 at 13:40

For a new IoT proof-of-concept (PoC) I shortly start I need to measure some parameters like e.g. temperature in a building environment (building can be broad interpreted: an office building, a hospital, etc.). After some investigation I think an option would be using Sub 1GHz for connectivity.

My questions:

- Would indeed Sub 1GHz be a viable option for these kinds of use cases?

- Or, are there better alternatives?

- For our PoC what devkits/components (a few edge device kits + a gateway device to connect the edge devices to the Internet/CLoud), as a result of my 2 previous questions, can we best use?

Thanks.

#sub-1ghz-nucleo #stm32 #nucleo #wireless

[Oliver Beirne]

Posted on February 24, 2017 at 14:57

Hello

I have moved your question to the

https://community.st.com/community/stm32-community/stm32-forum?sr=search&searchId=5d9c3d04-1155-4fa8-9db2-0ec0b76548e6&searchIndex=0

‌ where someone should be able to help you.

Thanks

Oli

[David SIORPAES · Accepted solution]

Posted on February 24, 2017 at 15:45

There's a very nice IoT kit based on ST Sub 1GHz SPIRIT radio that may well suit your needs: look at 

http://www.st.com/en/evaluation-tools/steval-idi005v1.html

 evaluation board. It's a coin-cell battery operated wireless sensor with MEMS accelerometer, temperature sensor and humidity sensor. You'd use a few of these boards as 'edge devices' and 

http://www.st.com/en/evaluation-tools/steval-sp1ml868.html

 as a gateway.

[Guy Dillen]

Posted on February 24, 2017 at 16:34

Ok thanks.

Guy

[Guy Dillen]

Posted on February 24, 2017 at 16:34

Many thanks.

[Guy Dillen]

Posted on February 24, 2017 at 17:23

I suppose the

/external-link.jspa?url=http%3A%2F%2Fwww.st.com%2Fen%2Fevaluation-tools%2Fsteval-idi005v1.html

hasn't a possibility (input ADC pin) to add (and read the values from) an additional analog sensor?

Thanks.

[David SIORPAES]

Posted on February 24, 2017 at 17:38

Actually pin 1 of JP2 is there for this exact purpose (see page 3 of 

http://www.st.com/content/ccc/resource/technical/document/user_manual/group0/af/05/9e/78/74/ec/44/99/DM00275565/files/DM00275565.pdf/jcr:content/translations/en.DM00275565.pdf

).

It connects to Pin1 of SP1ML module which is internally connected to STM32L PA2.

Here you can map ADC Input Channel 2.