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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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How can SSL be turned on on SIM868E?

We are using the SIM868E module for connection via GSM, with internal communication over UART. We need the SIM868E module to communicate with an HTTPS server, (using SSL), however after sending the commands AT+HTTPSSL=?, AT+HTTPSSL=1 or AT+CIPSSL=?…
Michiel van Lohuijzen
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Sim808 with Mqtt (AT+CIPSEND)

i am using Sim808 GPS Module to send lat-long and using MQTT to send it to subscriber. I followed tutorial from here to publish MQTT message over Sim808 but still no luck. Here is my sample code: def cmd(cmd, ser): out = b''; prev =…
Panji Setiawan
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Arduino UNO & Modem Sim800L - DNS Error when sending query params

I am using arduino UNO board, with modem sim800l. I want use it to send data to server, but the problem is that I receive 603 error when query parameters are supplied. For mySerial.println("AT+HTTPPARA=\"URL\",\"http://subdomain.domain.ro&val=1\"");…
Cristina Lupu
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Arduino UNO & Modem Sim800L Can't write setup commands to send data to server

I am using arduino UNO board, with modem sim800l. I want use it to send data to server, but the problem is that I can't write the setup commands. What am I doing wrong? Are not this the right commands to use for sim800l? I've tried with different…
Cristina Lupu
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How do I invoke a google cloud function through HTTPS request using a SIM800

I have an express app running on firebase functions. I have tested invoking the function from my browser to write data to my database and it works perfectly fine. I also set the "Cloud Functions Invoker" permission to "allUsers". My problem is, I…
Victor Manuel
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How Can I send AT commands to GPS module connected to a raspberry pi

My GPS module doesn't automatically turn on its GPS to receive data. The module uses AT commands to turn on GPS and the the GPS shuts down when you remove it from its power source. The problem is I can turn on the GPS with PUTTY serial monitor …
Payus123
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sim808 POST request not sending data

I am trying to send data to a web app using the TCP connection of a SIM808 that is connected to my NodeMcu. Everything appears to work fine, connection is perfect but at the send part, the post request does not execute fully. below is my code and…
Coffmann
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SIM800H, Feather FONA trying to make http POST

I'm trying to make a POST http request to an elastic search server, but I am getting a 603 status and a failure. Here is the output when i am making the request. The chip itself works and the get request on the example works as well. I can send…
theofficialsebas
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When I send data to Arduino UNO using Firebase CLI to Cloud Firestore database, I get 404 Error

I want to send data to Cloud Firestore database using Sim808 GPRS module and Arduino UNO. The code I uploaded to Arduino is as follows: #include #include #define PIN_TX 10 #define PIN_RX 11 …
burakkorman
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hologram sim and sim800c module

I recently got a sim800c to mess around with programming and mobile networks and purchased a hologram sim card. I am trying to build a program in node.js that sends "AT" commands to the board and can send text messages. but I can't seem to get the…
Nik Hendricks
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Unable to post the data using GPRS

I am trying to send the data using GPRS sim800a but I am getting network error , before executing the AT+SAPBR=1,1.Signal strength will be good but as soon as AT+SAPBR=1,1 is executed, led starts blinking continuously and returns response code 601.I…
Jyothi S
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Arduino accepting only alternate characters

I am writing an Arduino code to receive SMS from a SIM800 module and then send the same message back to the sender. My code is as follows: #include SoftwareSerial mySerial(9, 10);//Connect to pin 9&10 on GSM module const byte…
Monty Swanson
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SIM800C : Uploaded audio AMR file has noise when played during call

I am able to upload the AMR file to SIM800C successfully. When I play the uploaded audio file during the call using the below command : #if CALL_RECORDED_AUDIO Serial1.print("AT+CMEDPLAY=1,C:\\REC\\"); …
THEJUS G G
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SIM800L with helical antenna attached and reattached still doesn't pick up any signal

Three weeks ago I have bought a SIM800L module which had the helical antenna in the whole package. Mounted everything right triple checking always and also powering it from a Li-po battery (3.7 V 1200 mAh). Now, the module answers to my commands but…
HungryMonkey
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Sim800L lag/delay before incoming calls are visible to arduino

I use SIM800L GSM module to detect incoming calls and generally it works fine. The only problem is that sometimes it takes up to 8 RINGS before the GSM module tells arduino that someone is calling (before RING appears on the serial connection). It…
Marek Serafin
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