Promise of completion

[troywweber7]

I have poured over the firmata.js file extensively. For some of the functions available on a board there is a callback that ensures the data has been sent because a response comes in. For other functions, you just send it and hope it happens. What is the preferred way to ensure a function like board.setSamplingInterval has actually completed? There is no callback function or response from the Arduino Board associated with this function.

My thought for how to resolve this: maybe I should call a dummy queryPinState function right after and use its callback? Or maybe using board.transport.drain will ensure that whatever I just queued up will be sent before I proceed?

[soundanalogous]

There is no way to do this because StandardFirmata running on the Arduino does not implement an RPC protocol. Many commands are only one direction.

[soundanalogous]

Also there is a proposal to add the ability to query the sampling interval: firmata/protocol#34.