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Questions tagged [sim800]

The SIM800 is a complete Quad-band GSM/GPRS solution in a SMT module which can be embedded in the customer applications. It is the successor of the SIMCom [tag:sim900].

Use this tag for questions related to SIMCom 800 series modules.

145 questions
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Unable to communicate with SIM800 board on raspberry pi 4

I have connected a new Itead sim800 board to a Raspberry Pi 4 Model B and trying to handle incoming SMS. I have disabled the serial login shell using the link and tried gammu and minicom(with /dev/ttyAMA0, /dev/serial0 & /dev/serial1 on baud rate…
tpk
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Simulate CTRL+Z in Python program to send SMS

I have written Flask web server on my Raspberry PI. The server receives POST and sends commands to SIM868 module hardware. This is my code I could write. def send(self): if not self.validator(): data = {'message': 'Validation…
Alexey Khachatryan
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How to call or send sms to a three digit number with sim800l?

Trying to call or send sms to a number that's not a phone number with sim800l via arduino results to an error. Does anyone knows how i can send an sms to a three digit number(for example, a network provider's number.). I need it for a project.
TimmyBTS
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Deference between sim800 and sim900

I have developed a card with sim900 and ATmel, and it works very well, but when I changed sim900 for sim800 it did not recognize the sim card. Difference in hardware design? SIM800,SIM800C modem operates from 3.4V to 4.4V supply range (Reduced…
Riadh Yahiaoui
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GSM SIM800C text to speech audio stream

I have this USB-to-GSM Serial-GPRS-SIM800C module and I have successfully been able to send AT commands to it and do stuffs, but what I really wanted was Text to speech capabilities, I was able to generate an AMR audio file, upload it unto the…
Xsmael
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problem of cookies with sim800l and api rest

I have make an API REST with a connection and disconnect functions. this use the $_SESSION of PHP to save the session. This work but wen I connect to the API with sim800l the $_SESSION is not used, I think the sim800l don't support cookies. tested…
jiere zffeff
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at command not responding on sim800L and arduino uno

I would like to ask around SIM800L EVB module to sending message using Arduino UNO R3 DIP/SMD CH340. i change the pin tx/rx from 2, 3 vice versa, 7,8 the result either not displaying anything or anytext, the serial monitor just displaying AT no…
mogleng
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pySerial + SIM800/900 AT commands - read buffer contains write buffer data from before

I've trying to send AT commands via pySerial to a SIM800 module. The problem I'm having is that when I send a command, the message I receive back is the output of the previous command (or sometimes, the previous command itself). My code looks like…
fistameeny
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Raspberry Pi (Python): Send SMS using SIM800L

Raspberry Pi 3 Python 2.7 Sim800L Hi! I am getting errors connecting to the gsm module Here's the code I got from rhydolabz import serial import RPi.GPIO as GPIO import os, time GPIO.setmode(GPIO.BOARD) # Enable Serial…
IyaSheep
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SIM800L GSM module not connect to network

I have a SIM800L module and I want to send SMS. But this module is not connect to network. I am from Sri Lanka. I am using 3G SIM card and I think it is not issue because if it 3G SIM it can shift to 2G. Am I right? I put this SIM card to my iPhone…
saji indra
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1 answer

SSL on SIM800 , certificate select issue

I am having some issues while working with SIM800. I am trying to upload SSL certificate but it is not going through. I created a certificate saved it in .cer format. I wrote the certificate in SIM800. I am able to read the content of cer file also.…
Daniel
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How do I play a prerecorded audio using GSM Sim800a with ESP8266 and Arduino IDE

I am writing a DTMF based code that whenever I call a specified person using my GSM Module i.e. SIM800A and ESP8266 (NodeMCU v2) using Arduino IDE, person will hear an audio file about the DTMF Tones available. But while searching the internet on…
Ansh Goel
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SIM800L Date and Time is not working. How to convert from int to string?

I am currently working on a device and it sends data to Firebase. Unfortunately, I am unable to send the correct time and date. CONVERT TIME INT TO STRING I tried setting the time but it ignores the changes. AT+CLTS=1 should enable network time…
CodingRookie
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SIM800 MQTT publish to Google IoT Core

I'm trying to publish some data to Google Cloud using the SIM800 module together with ESP32. Google IoT Core provides its documentation on connecting MQTT clients here. It says: Associate the MQTT client with MQTT server certificates. However, in…
Mikołaj
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SIM800 - How to send mms with c++

I have a project where I have to send an mms on a raspberry via the sim800 shield, I have at the beginning to test with a program in python which works but when I pass in c++ I do not manage to make the passage. Here is the program in python #…
julien L
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