In the description of GPRS/GPS Tracker HAT it’s stated “Power-sensitive projects require advanced power controls and sleep mode features which become a great advantage of this board”
I am not able to find any documentation in this topic. Has anybody used sleep mode, or can i find documentation somwhere?
Ok, if the DTR pin is not connected i cannot understand how to put it to sleep mode. The PWRKEY will shut down the regulators. If I do that i have problems with the ppp connection when turning it on.