Good day!

There is a problem with the sim800l module. I tried to connect sim800l to the network, but it does not connect. The LED should flash 3 times per second, but it slowly flashes 9 times, then turns off, then 7 times, then turns off again, the cycle repeats ... The power source that I use is 4 VDC. Current 2A. I connected a capacitor to the power pins.

GND and NET are short-circuited, is this normal? I tried to unsolder an external antenna connector and cut the wire, but it did not help.

I got a new module, but the problem remains. Could the party be defective?

Thank you for your attention!