Sim800C no connection

Hey Guys i have a Sim800C and i have no connection. Nodered
I connected the Sim800c with a usb-FTDI_FT232R_USB_UARTConnector and then connected it to the Raspberrypi. This is also recognized

nodered: 
    image: nodered/node-red
    container_name: nodered
    privileged: true
    restart: unless-stopped
    ports: 
      - "1880:1880"
      - "53160:53160/udp"
      - "42416:42416" #Alexa
     # - "20211:20211" # Pi Alert
    volumes:
      - /home/pi/smarthome/nodered:/data
    devices:
      - /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A50285BI-if00-port0:/dev/ttyUSB0
    networks:
      mynet:
       ipv4_address: 172.20.0.2

Don't use docker or any other container platform - it causes nothing but problems. :man_shrugging:
most here use Node RED natively.

Sorry, as blunt as it sounds - all these problems are due to overly complex, container platforms

Ich habe es direkt an Raspberry angeschlossen und auch ohne Knoten getestet. Es funktioniert nicht, es leuchtet nur die blaue Leuchte dauerhaft

I just used a raspberry shot and also tested the buttons. If it doesn't function, it's light now that the blue light lasts