S120 - possibility

[Robert]

Hi, I am working on my new project. My goal is a sensor network. I have to create four service, one or two basic service like htm and battery service and other with contains custom service. For example

1. battery service 1 char. -> battery level
2. htm service 1 char. -> temp. level
3. my castom service (r/w) 1 char. -> 3 bytes 2 char. -> 1 byte
4. my castom service (r/w) 1 char. -> 1 byte 2 char. -> 1 byte 3 char. -> 1 byte 4 char. -> 1 byte

Central device must support 5-6 device. Is it possible, with nrf51822 (S120 0.8.0)?

[Ole Morten]

There shouldn't be any problem with such service setup, neither with the S120 nor with the S110. Beware that the GATT Server in S120 0.8.0 is limited to read-only, but I don't think this should be a problem for you, as I assume you are planning to put all this data in your sensors, in which case the S120 will be the GATT Client. Take a look at this question for an explanation of roles.

The S120 is capable of keeping a connection with up to 8 Peripheral devices simultaneously.

Finally, there is an alpha of version 1.0.0 available, so you should make sure to use this instead of 0.8.0!

Edit: The alpha of 1.0.0 also includes a writable GATT Server, as opposed to 0.8.0.