nRF Connect Android - what do the arrows mean?

[awneil]

(there isn't an option for nRF Android or Mobile when creating a case!)

Next to each Characteristic is one or more little arrow icons:

Where is the documentation which describes what these actually mean?

[Musa]

Single arrow means read the current value, triple arrows enables notifications, so when the characteristic value changes, you will see it change on your screen. Data is typically written in hex.

[awneil]

There are other arrows, too - what do they mean?

And, more to the point, where is this documented ?

[Kenneth]

Hi,

I couldn't find it documented, but a quick guide:

arrow pointing down = read
arrow pointing up = write (type to be chosen on the dialog) or send notification/indication (when in Server tab)
3 arrows pointing down = enable notifications
3 arrows pointing down, crossed = disable notifications
2 arrows, one up, one down = enable indications
2 arrows, one up, one down, crossed = disable indications
traffic light symbol = add Sleep If/Sleep Until when Macro is running
underlined pen = set value (on Server tab, a characteristic or descriptor that can be read from remote side allows to set it's value)

In general: Clicking an icon causes an action... opens a dialog or changes Enabled/Disabled state. So hopefully it is observable what just happened.

Best regards,
Kenneth 

[awneil]

Kenneth said:

I couldn't find it documented

If even you can't find it, then I think we must say that it is  not documented.

Please raise this to be rectified.

Kenneth said:

arrow pointing down = read
arrow pointing up = write

What's the logic behind that?

The arrow directions seem entirely counter-intuitive to me!

[Aleksander Nowakowski]

Arrow pointing down is a common icon for "download" while up for "upload", you may find them for example here: https://material.io/tools/icons/?search=load&style=baseline

In case of nRF Connect, downloading is reading data from the device while uploading is sending data to the device. The line below represents... the phone?

I've just published the documentation here: github.com/.../documentation

Btw, the icons will soon change to a bit bigger and, I hope, better. Instead of crossed icons there will be gray/blue to indicate whether notifications/indications are enabled or not. But arrows direction will be preserved.