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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@user103949
Yes, sorry, I updated my question after posting ;-)
I think Bluetooth 4.2 is fine in general as it supports the vast majority of use cases.
Regarding the MTU: Is an increased MTU size possible without Data Length extension?
Also, what does the current Espruino stack do with an incoming gatt MTU request? Does it ignore the request or does it respond with an error? My gut feeling is the sensor should not use an MTU of 40 bytes unless the Central device has acknowledged it.
Thanks,
-- Terrence