Fix hardReset method to match the datasheet

[CCorrado]

After reviewing the code for the MKRNB library, I noticed the hardReset method is still incorrect when compared to the SARA-R410M-02B datasheet.

Ref: https://www.u-blox.com/sites/default/files/SARA-R4_DataSheet_%28UBX-16024152%29.pdf

[github-actions]

Memory usage change @ 47c66f2

Board	flash	%	RAM for global variables	%
arduino:samd:mkrnb1500	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0

Click for full report table

Board	examples/GPRSUdpNtpClient flash	%	examples/GPRSUdpNtpClient RAM for global variables	%	examples/NBSSLWebClient flash	%	examples/NBSSLWebClient RAM for global variables	%	examples/NBWebClient flash	%	examples/NBWebClient RAM for global variables	%	examples/ReceiveSMS flash	%	examples/ReceiveSMS RAM for global variables	%	examples/SendSMS flash	%	examples/SendSMS RAM for global variables	%	examples/Tools/ChooseRadioAccessTechnology flash	%	examples/Tools/ChooseRadioAccessTechnology RAM for global variables	%	examples/Tools/NBScanNetworks flash	%	examples/Tools/NBScanNetworks RAM for global variables	%	examples/Tools/PinManagement flash	%	examples/Tools/PinManagement RAM for global variables	%	examples/Tools/SerialSARAPassthrough flash	%	examples/Tools/SerialSARAPassthrough RAM for global variables	%	examples/Tools/TestGPRS flash	%	examples/Tools/TestGPRS RAM for global variables	%	examples/Tools/TestModem flash	%	examples/Tools/TestModem RAM for global variables	%
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	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	0	0.0	0	0.0	0	0.0	0	0.0

Click for full report CSV

Board,examples/GPRSUdpNtpClient<br>flash,%,examples/GPRSUdpNtpClient<br>RAM for global variables,%,examples/NBSSLWebClient<br>flash,%,examples/NBSSLWebClient<br>RAM for global variables,%,examples/NBWebClient<br>flash,%,examples/NBWebClient<br>RAM for global variables,%,examples/ReceiveSMS<br>flash,%,examples/ReceiveSMS<br>RAM for global variables,%,examples/SendSMS<br>flash,%,examples/SendSMS<br>RAM for global variables,%,examples/Tools/ChooseRadioAccessTechnology<br>flash,%,examples/Tools/ChooseRadioAccessTechnology<br>RAM for global variables,%,examples/Tools/NBScanNetworks<br>flash,%,examples/Tools/NBScanNetworks<br>RAM for global variables,%,examples/Tools/PinManagement<br>flash,%,examples/Tools/PinManagement<br>RAM for global variables,%,examples/Tools/SerialSARAPassthrough<br>flash,%,examples/Tools/SerialSARAPassthrough<br>RAM for global variables,%,examples/Tools/TestGPRS<br>flash,%,examples/Tools/TestGPRS<br>RAM for global variables,%,examples/Tools/TestModem<br>flash,%,examples/Tools/TestModem<br>RAM for global variables,%
arduino:samd:mkrnb1500,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0

[CCorrado]

@janakelarsson @aentinger am I misinterpreting the datasheet? It says minimum 10s for low pulse to reset the modem using RESETN. 1 second, in my testing on my MKR NB 1500, does nothing to reset the modem.

[janakelarsson]

Thanks, I must have missed that somehow. In my case, 1 s was sufficient to reset the modem.

[CCorrado]

@aentinger any thoughts around this one?

[aentinger]

The 10 seconds strike me as containing a high margin for safety but since the data seem to require such a long delay I'm good with this change.