I have a BK-SIM7080G whose RX and TX pins are connected to an Arduino Nano.
I have the SIM7080G connected to my PC using a USB cable for power supply.
I have a brand new SIM card inserted, and I know it works because I’ve tested it on other devices. There’s also reception so the signal shouldn’t be a problem.
I use an FPC full band LTE antenna.
I have tested some AT commands and here are their outputs:
+CMS ERROR; 500
What could’ve been the problem?