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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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Publish Binary data support via Simcom sim868 MQTT

I am trying to publish binary data via sim868 MQTT but facing issues in case of some binary values. For example, When I want to publish the binary number 0 (0x00), then if I send 0x00 to sim868 through the AT command it interprets it as 0 (NULL…
Usama Shahid
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How to set user data parameter for Authorization Bearer in sim800c

I am trying to send data to a server using sim800c with bearer token authentication. Using Postman the config is like picture below : to add this header to my post request I'm using: AT+HTTPPARA="USERDATA","Authorization: \"Bearer [My…
Farshad Nabizadeh
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SIM800 receive SMS encoding issue

I am trying to setup a SIM800 to receive SMS messages from my alarm system and I got it working... almost. When I send a SMS message from my phone, the SIM800 receives the message correctly in readable format. However, when the alarm system sends a…
jokkemokke
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SIM800L modem HTTPS issue

I'm having problems using SSL certificate pinning in SIM800L. I can successfully make GET requests using both AT+HTTPSSL=0 and AT+HTTPSSL=1. However, the module doesn't check whether the offered server certificate is valid. According to this thread…
gregork
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SIM800l Httpaction. Can't get 0,200 or 0,200

I'm playing with HTTP GET and POST methods and I have problem. My problem is next one: Last week my GET method was work perfect and then suddenly stop working. Problem occur because MCU can't got response in this format: 0,200,xxx. Code is identical…
subavet995
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SIM800l Replies wih a delay. Http get

I trying to use http get method on SIM800l (mcu for controling SIM800 is STM32F407VGT6). I can send SMS message or read all/specific SMS message but with http methods I'm in trouble(power supply is enough for SIM800l). I read so many forums,…
subavet995
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What are the supported cipher suites in sim800c?

I'm trying to communicate with a server that uses SSL/TLS but has some limited cipher suites. How can I get a list of supported cipher suites in my sim800c to see if it can communicate with the server?
Abol_Fa
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AT+CGATT? returns "ERROR" from SIM800C module when connected with Arduino

I have used the SoftwareSerial library and Serial interface to communicate between SIM800C and Arduino in serial communication mode. I gave AT AT+CSQ AT+CGATT? AT+SAPBR=3,1,"CONTYPE","GPRS" etc via Serial monitor. When I used it for the…
Gayashan Rathnavibhushana
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Raspberry pi zero interface with gsm/gprs module

I am new to raspberry pi zero and I want to connect it with gsm module for gprs connectivity . I bought sim800a gsm module but its led not even blinking single time I am able to turn on the UART on pi zero and coonect it over usb cable through ssh…
M.Shah
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SIM800C GSM AT COMMAND How to upload .amr audio file programmatically

I am desperatly trying to upload some audio file to the internal memory of a SIM800C, so far this is what I've been able to do, but the uploaded file seems void, and doesnt play any sound. But with AT+FSLS=C:\\ I can see the file is there. Here are…
Xsmael
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Sending multiple post requests with sim800C

I am working on the sim800C board, primarily on sending HTTP post requests. As I understand from manual and samples online, the process of sending a post request with AT commands involves: Configuring Bearers: open a bearer and set it…
Sam Yu
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importing SSL certificate into SIM800C

I want to upload SSL certificate in SIM800c modem using At Command and following the same process as mention in the document. But I am getting failed every time. The process as below for AT…
Gaurav Choube
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Sim800L time not updating to network time

Im hoping someone could help me please. I am trying to retrieve time and date from the Sim800L and I am coming short. I have a Sim800L here and I am communicating with it successfully over the Arduino IDE. I have used the following AT commands as…
Misha
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How to communicate with sim800c using Raspberry pi 3 in c++

My end goal is to try and send some simple data that's stored on my Raspberry pi 3 to an external server/website using a sim800c from a c++ program. I believe the easiest way to do this is to issue "AT commands" to the sim/modem however I'm…
Draknar
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sim800 and Codeigniter CSRF token problem

hi Sorry for my weak English. I'm trying to receive the JSON data from Sim800 on my Server using Codeigniter. when in config.php file i set the $config['csrf_protection'] = TRUE; the Server Response 403 error and when it's false Server Response 200…
omid ebrahimi
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