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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.
@Robin
Tue 2020.03.24
While Bluetooth.com continues minor site access limitations, I finally found a link to a page of deprecated specifications. (as the post #1 link 403's)
BT 4.0
Publication date: 30 June 2010
version: 4.2
Publication date: Dec 02 2014
p.17
Mentioned in BT 4.0
'There are two forms of Bluetooth wireless technology systems: Basic Rate (BR) and Low Energy (LE)'
p.85 4V2
'To claim support to the “Low Energy” Core Configuration, an implementation must support a set of Required Features, according to the details in Table 4.6 and Table 4.7'
Using Gordon's statement post #10 that his July 2015 Moto 3 worked, it is interesting to note
that BT and BLE are mentioned separately, so the Moto Gen3 purchased July 2015 had Bluetooth 4.0, A2DP, LE and OS Android 5.1.1 (Lollipop), upgradable to 6.0 (Marshmallow)
It appears that around four years elapse from the announcement of the BT spec, and around two years for the Android spec announcement that allows for the hardware to finally get into the hands of the consumer. Devices pre 2017 seem to specify both BT and BLE as a separate listing and Motorola was an early adopter here. Devices such as the Huawei P10 purchased fall 2017 and list the minimum core spec BT 4.2 and Android 7, to be able to make the 'Low Energy' claim. see p.85 above 4V2