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I need some help. I'm absolute new in the topic raspberry pi. I'm trying to connect the RPI3 with the SIM800 (https://www.itead.cc/wiki/RPI_SIM800_GSM/GPRS_ADD-ON_V2.0).

What I did:

Whats my problem: If I try to run the code

import serial   
import os, time

# Enable Serial Communication
port = serial.Serial('/dev/ttyS0', baudrate=9600, timeout=1)

# Transmitting AT Commands to the Modem
# '\r\n' indicates the Enter key

port.write('AT'+'\r\n')
rcv = port.read(10)
print rcv

I get a empty response. I also need to say that my Sim800 is searching for a network(according to the blinking LED)

Hopefully some of you can help me out with my problem.

Regards, Burner

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  • Have you tried connecting via minicom or miniterm.py? The latter is more minimal but is less grumpy? – goldilocks Jul 8 '17 at 19:17
  • According to the minicom statusbar (on the bottom of the window) it says following:CTRL-A Z for help | 9600 8N1 | NOR | Minicom 2.7 | VT102 | Offline | ttyS0 – burner Jul 8 '17 at 19:38
  • Yes, minicom is like that. I've found it useless when miniterm.py works with the exact same settings on various things including a SIM900. It comes packaged with pyserial so you will already have it installed. – goldilocks Jul 8 '17 at 21:14
  • i used to connect it over miniterm.py but after connecting to dev/ttyS0. I can't send any commands, but i can open the menu. I had the same problem with minicom. – burner Jul 9 '17 at 16:10

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