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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.
@mshalash
I would suggest Bluetooth serial module Class 1 which is 100 meter free air range and to be switched on by the Espruino module when time to send the log.
It is easy to communicat as it is serial RX TX communication most of the ones on ebay are 10m range class 2 and the class 1 on ebay has RS232 level conversion which consumes power so there must be a supplier who sells bare module with ttl RX/TX.
As for the recieving machin you could go for Android tablet, windows system or Linux .
good luck