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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
Fri 2020.04.17
Summary
When considering a device for flashing Espruino devices, especially the Puck, Pixl and MDBT42Q, Bluetooth BLE is required, along with an Android version supporing BLE, Bluetooth Low Energy.
Tablets would work (post #3 and post #13) but from strictly a price standpoint, a good used phone manufactured after late 2017 would be a good bet. (Android versions post #12)
Unable to locate any supporting evidence for the post #7 suggestion of Chromebook, (post #14 regarding Chromebook compatability) although I am considering a separate purchase to have a physical QWERTY keyboard with a large reading area, in lieu of a touch screen keyboard Android tablet.
There are several low investment unlocked no plan phones that may be had (post #16) for around $100 USD, that with the addition of NRF and GPS, make the device easily resellable, especially as one could even use the phone part! (not needed by me based on plan cost for number of calls made)
Sidebar for users in N.A.
CDMA only devices are on the way out. This means Verison and Sprint suggested year end 2020.
Support for 3G will most likely end 2022 in favor of the new 5G installations.
This means when purchasing a smart phone that would retain resellability, you're limited to GSM, an un-locked phone with the user selection of a Sim and Pay-As-You-Go card or a locked in monthly plan to use the 5G networks. It is likely your 4G will continue to work until year 2025