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.
Questions tagged [sim800]
145 questions
8
votes
1 answer
SIM800L Blank SMS issue
I am using a SIM800L module with a Texas Instrument Launchpad, with a MSP430G2553 microcontroller, not using an external library for SIM800L.
Problem Statement:
A Simple text message (SMS with Text Mode) is sent, received as a blank message on…
WedaPashi
- 3,561
- 26
- 42
5
votes
0 answers
On the SIM800, what is the difference between the "at+sapbr" commands, and "at+cstt", "at+ciicr" etc?
I understand that "at+sapbr" is used for setting up an HTTP or FTP connection and that "at+cstt" , "at+ciicr" etc. are used for just a TCP connection.
However, from what I understand, HTTP/FTP are just a layers on top of the TCP protocol.
Why…
5
votes
2 answers
Problem with sending data from c# to arduino for SIM800L
I think I missed something in my code.
Below is my code in C#
public Form1()
{
InitializeComponent();
serialPort1.PortName = "COM2";
serialPort1.BaudRate = 9600;
serialPort1.Parity = Parity.None;
…
Cristy Nazareno
- 71
- 9
4
votes
1 answer
How to connect a sim800l to a broker with SSL?
I am trying to connect to an a mosquito broker hosted on AWS, on port 8883, but so far I have not been successful.
I am using the TinyGSM and PubSubClient libraries.
The GSM module is connected to the internet and works perfectly in a broker without…
Larissa Santos
- 41
- 1
- 3
4
votes
2 answers
SIM800 HTTPS 606 Error
I have been using SSL to connect a SIMCOM SIM800 GSM Module to a Microsoft Azure function endpoint. This has been working for months and has now stopped working and reports a 606 error code which indicates an "SSL alert message with a level of…
Patrick Fischer
- 51
- 1
- 6
3
votes
1 answer
SIM800L check if call was answered
I need to disable the dialing tone on my SIM800L and for that I need to know if the receiving end has answered the call. AT+CPAS returns 4 which stands for 'in progress' both during conversation as well as during the tone before the call is answered…
tomas1808
- 33
- 3
3
votes
2 answers
SIM800l - Disable "SMS Ready" and "Call Ready" unsolicited messages
My problem is related to SIM800 connection messages.
I use the module with STM32 developlment board. Sometimes module is reporting SMS Ready and Call Ready messages respectively. When I start to send AT commands to the module, it may send these…
karamelekrobotics
- 77
- 1
- 9
3
votes
1 answer
Arduino UNO + SIM800L - sending data to server
I am using arduino UNO board, with modem sim800l. I want use it to send data to server mysql every 10 seconds. Everything is working fine when I have serial monitor open in arduino IDE (data is being saved to the mysql database)but when serial…
Marcin
- 45
- 1
- 7
3
votes
1 answer
Why does SIM respond to AT+CIPSEND with “+CME ERROR: operation not allowed” when the IP address and the TCP connection has been established?
I am working with a team to send data from Raspberry Pi over 2G network to a server using a GSM module called “SIM800L EBV”. We encountered an AT+CIPSEND error that has only occurred in Zambia, Africa while having been working correctly in the US…
ECE 19.4 Team
- 31
- 3
3
votes
2 answers
Sim 800 +HTTPACTION: 0,601,0
I'm trying to get a gprs connection to a server by using a sim 800 module.
I'm getting 601 errors.
I have tried the debbuging that are described in this question: error +HTTPACTION:0,601,0
AT
OK
ATZ
OK
AT+CFUN=1
OK
AT+CPIN?
+CPIN:…
tschuehly
- 65
- 1
- 7
2
votes
0 answers
SIM7600 AT conference calling not working
I'm using a SIM7600A-H and I can make a voice call, add another call, switch between calls by placing one on hold but I cannot merge the lines.
atd;
OK
atd;
OK
AT+CLCC;
+CLCC: 5,0,1,0,0,"",129
+CLCC:…
vinniyo
- 145
- 14
2
votes
1 answer
Unable to receive flash (Class 0) SMS on Modem
I am experiencing with AT commands using a sim800 modem (Dinstar), I am unable to get the response of the STK command after STK send short message.
When using my phone, the process goes as follows:
Start the STK app
Navigate through the STK menu to…
Reda
- 287
- 2
- 8
- 21
2
votes
1 answer
SIM800c - Disable "OVER-VOLTAGE WARNNING" unsolicited messages
How to disable "OVER-VOLTAGE WARNNING" URC on sim800c?
Im using SIM800C with esp32, is there any at commands to disable these warnings?
Rohitsam
- 91
- 8
2
votes
1 answer
Can AT+CMGS be cancelled without ESC?
Is it possible to have AT+CMGS commands cancelled by some control code other than ESC?
I need it because ESC is intercepted by the attached equipment for its own use and never gets to the modem. And, I can't change that.
Unfortunately, CTRL-Z will…
tonypdmtr
- 3,037
- 2
- 17
- 29
2
votes
1 answer
How can I start a conference call on GSM network?
I need to make a conference voice call on GSM network.
The maximum I have seen in the datasheet is that the command AT+CLCC can report a list of current calls of ME automatically when the current call status changes.
How can I make conference calls…
bashman
- 138
- 2
- 11