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lancaster-university / microbit-dal

http://lancaster-university.github.io/microbit-docs
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Choice of WRITE Vs WRITE WITHOUT RESPONSE operations on Client Event characteristic to be configurable #411

Open smartyw opened 5 years ago

smartyw commented 5 years ago

An issue with Web Bluetooth makes it difficult to work with characteristics that support both WRITE and WRITE WITHOUT RESPONSE.

Please make it possible to configure which of these operations the Client Event characteristic supports in a way which makes it possible to expose this capability in MakeCode.

See https://github.com/Microsoft/pxt-microbit/issues/1742

smartyw commented 5 years ago

FYI I'm going to submit a PR for this. The goal will be to expose a new config.json property which allows selection of the three possible permutations of WRITE types for the CLIENT_EVENT characteristic, like this:

"client_event_write_types" : "FAST_ONLY",
"client_event_write_types" : "RELIABLE_ONLY",
"client_event_write_types" : "BOTH_FAST_AND_RELIABLE",

// default will be "BOTH_FAST_AND_RELIABLE"

FAST means WRITE_WITHOUT_RESPONSE

RELIABLE means WRITE request

BOTH means both and will be the default as that is the current situation.