ESP TimeService: remove delays introduced by NTP requests

[pennam]

Using ESP boards each ArduinoCloud.update() call is firing an NTP request introducing potentially long delays in the loop().

• ESP32 boards have an internal RTC that can be configured and readed using core API.
• ESP8266 do not have an internal RTC so the value is synced once a day with the NTP server and updated using millis().

Fixes #319

[codecov-commenter]

Codecov Report

Merging #340 (6879eb7) into master (ec959ae) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #340   +/-   ##
=======================================
  Coverage   94.87%   94.87%           
=======================================
  Files          27       27           
  Lines        1113     1113           
=======================================
  Hits         1056     1056           
  Misses         57       57           

Impacted Files	Coverage Δ
src/cbor/CBOREncoder.cpp	88.65% <ø> (ø)

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[github-actions]

Memory usage change @ 9facaec

Board	flash	%	RAM for global variables	%
arduino:mbed_nano:nanorp2040connect	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_nicla:nicla_vision	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_portenta:envie_m7	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkr1000	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrgsm1400	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrnb1500	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrwan1300	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:mkrwifi1010	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:samd:nano_33_iot	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
esp32:esp32:esp32	💚 -6884 - -840	-0.53 - -0.06	💚 -276 - -108	-0.08 - -0.03
esp8266:esp8266:huzzah	🔺 +112 - +112	+0.01 - +0.01	🔺 0 - +16	0.0 - +0.02

Click for full report table

Board	examples/ArduinoIoTCloud-Advanced flash	%	examples/ArduinoIoTCloud-Advanced RAM for global variables	%	examples/ArduinoIoTCloud-Basic flash	%	examples/ArduinoIoTCloud-Basic RAM for global variables	%	examples/utility/ArduinoIoTCloud_Travis_CI flash	%	examples/utility/ArduinoIoTCloud_Travis_CI RAM for global variables	%	examples/utility/Provisioning flash	%	examples/utility/Provisioning RAM for global variables	%	examples/utility/SelfProvisioning flash	%	examples/utility/SelfProvisioning RAM for global variables	%
arduino:mbed_nano:nanorp2040connect	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:mbed_nicla:nicla_vision	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:mbed_portenta:envie_m7	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkr1000	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkrgsm1400	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkrnb1500	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkrwan1300	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:mkrwifi1010	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
arduino:samd:nano_33_iot	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
esp32:esp32:esp32	-6852	-0.52	-276	-0.08	-840	-0.06	-108	-0.03	-6884	-0.53	-276	-0.08
esp8266:esp8266:huzzah	112	0.01	16	0.02	112	0.01	0	0.0	112	0.01	0	0.0

Click for full report CSV

Board,examples/ArduinoIoTCloud-Advanced<br>flash,%,examples/ArduinoIoTCloud-Advanced<br>RAM for global variables,%,examples/ArduinoIoTCloud-Basic<br>flash,%,examples/ArduinoIoTCloud-Basic<br>RAM for global variables,%,examples/utility/ArduinoIoTCloud_Travis_CI<br>flash,%,examples/utility/ArduinoIoTCloud_Travis_CI<br>RAM for global variables,%,examples/utility/Provisioning<br>flash,%,examples/utility/Provisioning<br>RAM for global variables,%,examples/utility/SelfProvisioning<br>flash,%,examples/utility/SelfProvisioning<br>RAM for global variables,%
arduino:mbed_nano:nanorp2040connect,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:mbed_nicla:nicla_vision,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,,,,
arduino:mbed_portenta:envie_m7,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,,,,
arduino:samd:mkr1000,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,,,,
arduino:samd:mkrgsm1400,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,,,,
arduino:samd:mkrnb1500,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,,,,
arduino:samd:mkrwan1300,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,,,,,,,,
arduino:samd:mkrwifi1010,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:nano_33_iot,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
esp32:esp32:esp32,-6852,-0.52,-276,-0.08,-840,-0.06,-108,-0.03,-6884,-0.53,-276,-0.08,,,,,,,,
esp8266:esp8266:huzzah,112,0.01,16,0.02,112,0.01,0,0.0,112,0.01,0,0.0,,,,,,,,