I am interfacing a 5V logic serial device with a Particle argon. A Li-ion battery is connected for backup.
As far as the USB is powered, I can use the USB pin on Argon to get 5V directly to my serial device (no issues faced in TX RX transmissions). But at the instant the USB is unplugged, I will lose my access to 5V through the USB pin.
Any solution to get 5V when the Argon is powered from battery.?
I can see the 3.7-Pin is internally connected to the battery +ve , Can I use a 5V booster directly from here.?