Board Info
Pin Definitions
BOOT 3V3 GND PIN RXD TXD
Power supply
- 3V3 500mA
- Logic level is the sme 3V3
Common Debug Error
- you must use NBIOT Card, normal phone card may not work
- if the card no service, system will shut power at CREG 0,2
PSM Mode
- AT commands to enter into PSM power save mode
- pull down RTC_EINT or PWR_KEY to quit PSM mode
Dimension / Pins / Schematic
