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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.
@Blizzard
Hi Gordon, allObjects,
many thanks again for the feedabck, as usual you are a "wealth of information".
I try to start from the last suggestion (which gives me many cues for action) making the following simple experiment.
The fairly simple connections are made through a breadboard; explicitly removing the cable on the power line connected with 3.3V pin on the Nucleo board I can still read the serial number via Espruino (this is for me quite surprising since I had the same idea of @allObjects concerning power supply management)
Same behaviour for the other "native" implementation where I get the serial number correctly but, subsequently, the sensor always read 85 ° C from the scratchpad memory which, according to the device user manual, represents the value of the scratchpad at "power up state"
No subsequent temperature variation is measured \ perceived by the sensor in this configuration.
Reconnecting the power supply pin (even "on the fly") all goes back to working properly...
Regards