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Thank you for your previous instructions. I carefully executed each step as advised. After rebooting the system, I initiated the minicom 115200 -D /dev/serial0 command. However, the problem still persists, and I’m unable to interact with the module as I cannot input AT commands.
dmesg | grep tty
[ 0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=1 snd_bcm2835.enable_headphones=0 snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_hdmi=0 video=Composite-1:720×480@60i smsc95xx.macaddr=B8:27:EB:20:FC:EF vc_mem.mem_base=0x1ec00000 vc_mem.mem_size=0x20000000 console=tty1 root=PARTUUID=0be438f9-02 rootfstype=ext4 fsck.repair=yes rootwait
[ 0.001508] printk: console [tty1] enabled
[ 3.812014] 20201000.serial: ttyAMA0 at MMIO 0x20201000 (irq = 81, base_baud = 0) is a PL011 rev2
[ 3.824402] 20215040.serial: ttyS0 at MMIO 0x20215040 (irq = 53, base_baud = 50000000) is a 16550
[ 7.788563] systemd: Created slice system-getty.slice.