Serial Communication In Raspberry Pi 3 B+

I want to communicate between Raspberry pi 3 B+ and GSM GPRS A6. I tried and I am unable to send data to GPRS Module from Raspberry pi. Now, I know that GPIO serial port is disable

Solution 1:

, First , be sure to enable the Serial.

sudo raspi-config -> Interfacing Option -> Serial

Second , sudo nano /boot/cmdline.txt

Delete "console=serial,115200"

And Then sudo nano /boot/config.txt

Add the end

dtoverlay=pi3-disable-bt core_freq=250

While you use : Serial(/dev/ttyAMA0,9600)

Solution 2:

try sending:

import serial

port = "/dev/ttyS0"
comm = serial.Serial(port, baudrate=115200)

whileTrue:
   comm.write('AT' + '\n\r')
   msg = comm.readline()
   print(msg)