I purchased 2 rak3172-sip powered them up and tried the at commands. unfortunately I immediately found 2 problems:
- when I try to read VBAT it returns 0.
- When I try to do Join the device communicates with a very weak signal even though the gateway is a few meters away.
The firmware Is the last version of RUI, ed the problem Is the same with the firmware insider the module, the band Is EU868.