SIM800L AT commands

SIM800L GSM Module with Arduino AT Commands Library

Browse other questions tagged at-command sim800l or ask your own question. The Overflow Blog Level Up: Linear Regression in Python - Part 7. Podcast 353: Bring your own stack - why developer platforms are going headless. Featured on Meta Beta release of Collectives™ on Stack Overflow. ///// //Script- sim_lock.at //Test SIM lock related AT commands with this script ///// //Get the status of SIM PIN //Pin status can be, // READY - This means SIM PIN is already unlocked or lock has been disabled // SIM PIN - This means SIM PIN is locked and code is required // SIM PUK - Maximum number to retries to unlock has reached Connect the Arduino with the SIM800L modul, according to the above and connection will be shown as follows. For safety, give the power to SIM800L module through Arduino Uno board via a diode as follows. Fore more details read the following image as well. If all the wiring connections are checked and confirmed as correct, go to the Arduino. In this article we will examine how to make a HTTP/GET Request to web page using AT Command of SIM800L. We will give you the list of AT Command needed and step by step the sequence of the AT Command. If you are using arduino to make GET request you need a sketch to forward data from your computer's serial monitor to SIM800L The reason behind it is that the SIM800L handles AT (instructions to command a modem) commands into the SIM card, and in order to understand what is going on we need to understand the AT commands first. The following sketch reads and writes to the serial port

SIM800L GSM/GPRS Module Easy AT Commands Arduino Maker Pr

In this article we will examine how to make a HTTP/GET Request to web page using AT Command of SIM800L. We will give you the list of AT Command needed and step by step the sequence of the AT Command. If you are using arduino to make GET request you need a sketch to forward data from your computer's serial monitor to SIM800L. Use this sketch : Use pin 10 and 11 for Serial connection between. 2 Answers2. httpdata=100,10000 means that SIM800 should expect 100 bytes within 10 seconds. At this point, the SIM800 should respond with DOWNLOAD. Which means it's expecting your data. Send in your data; in my case: Wait 10 seconds to send the rest of the commands. Then: That did it for me This is sim 800l module. you can use this with arduino uno to operate the module. This module is GPRS module.You can watch more details from the following li..

Setting up GPRS with SIM800L - Tutorial

In this video, I will introduce you sim800l AT commands with arduino uno and serial terminal program called Putty. Here I am using general purpose AT command.. I am trying to send AT commands to SIM800L through Arduino's Serial Monitor. However when I type any command in the serial monitor nothing happens. I'm using an Arduino MEGA 2560 and the TX/RX of the SIM800L is connected to 9 and 10 respectively. Here is the code With the SIM800, data can be sent to a web server via HTTP using POST/GET. This allows you to connect a homemade weather station or other sensors to the Internet at a reasonable price if Ethernet, LoRa or WiFi is not available at the site. This article is about sending a HTTP request with the SIM800 using AT commands Introduction to SIM800L. There are so many GSM modules that came to market right now. And SIM800L almost the cheapest. It cost under 10$ and has the same feature as other. So, this module is a great one. This module works just like another module, it uses AT Command to communicate with arduino and has the same command

SIM800L HARDWARE Most important part of the module is the Chip made by SIMCom. Its operating voltage in which it works fine ranges from 3.7 V to 4.4 V(recommended), but you can use 5 V with some nominal current The best document for learning about these commands is the 3GPP Command Set which is the standard that all modern GPRS modems should adhere to. Share. Improve this answer. Follow answered Oct 8 '16 at 15:23. SIM800l doesn't respond on arduino micro. Hot Network Question

SIM800 Series_AT Command Manual_V1

Using SIM800L GSM Module with Arduino (Updated 2020

SIM800 is a popular GSM GPRS modem. It supports General Packet Radio Service (GPRS) for connecting to the Internet. This module has built-in TCP/IP stack that can be accessed serially with AT commands.The modem needs to be configured by connecting it to a PC. In such setup, the SIM800 modem with SIM card acts as TCP client and the PC acts as TCP server SIM800L is nice and inexpensive GSM breakout board. So a dixode is needed to step down the voltage a bit. Google SIM800L power requirements Check the SIM800L AT commands manual//Your phone number don't forget to include your country code example +212xxxxxxxxx//Required to tell the module that it can send the SMS 6.2.27 at+cbte User should send the commands listed above to turn on GPS power supply, reset to GPS and send out the GPS data. l AT+CGPSPWR=1 (turn on GPS power supply) l AT+CGPSRST=1 (reset to GPS mode) l AT+CGPSOUT=255 (send out the GPS data) Notices: User should send the commands listed above to turn on GPS power supply and reset to GPS mode the RST pin of the sim800L module is connected to the 3.3V port of the arduino. I have changed the baud rate of the softwareserial object to 1200 2400 4800 and 9600 without success. I have checked Both NL & CR in the serial monitor settings. I have post AT and at and all other things. whatever the command, the module never answer a clear.

A link to the SIM800L module that you're using may help, since there are many available. \$\endgroup\$ - Steve G Oct 5 '17 at 9:31 1 \$\begingroup\$ @AbelTom As far as I remember sim800 doesn't work @ 5 V Sim800 not responding to AT commands. I have a Sim800 GSM module hooked up to pins 8 and 10 of the a PI B+ running the latest version of Jessie. I have configured Jessie so that nothing else is using the TXD0 and RXD0 pins. If I connect a pc up via a USB to TTL adapter to the pins I can see that whatever I type on the PC shows up on the PI and. intentionally. The A T Command set im plemented by SIM800 Series is a com bination of 3GPP TS 27.005, 3GPP TS 27.007 and ITU-T recommendation V .25ter and the A T commands deve loped by. SIMCom. Note: A HEX string such as 00 49 49 49 49 FF FF FF FF will be sent out through serial I am using SIM800L with PIC16F877A. I have developed the code to send AT commands but it always shows ERROR. What I am missing? The Baud rate is set to 9600 on 20MHz external crystal oscillator SPBRG = 129 BRGH = 1 _XTAL_FREQ 20000000 // PIC16F877A Configuration Bit Settings // 'C' source..

How to Play with SIM800L — Part 2/2 - ElectroSchematics

This document presents the AT commands of FM operation and application examples. This document can apply to SIM800 series modules, including SIM800L and SIM800H Uploading via SIM800 GSM module using AT+ commands. Does anyone know what is wrong when I am able to complete a send with SEND OK but the channel is not updated? My Arduino code is using TCP and is it very simple. I think I am suppose to get the update number from as feedback but i never get it To get complete AT Command tutorial, click on this link. If we want to get the Signal Quality Report of SIMCOM GSM Engine, AT+CSQ command is used. LIke other AT commands it can also be used as a Test Command and an Execution Command. GSM Modem I used is given in this page . Complete the circuit as shown in following figure

at command - SIM800L: AT+CIICR always goes to PDP DEACT

The below 7 are the most commonly used AT commands: AT: Used to check the interaction between the computer and the module. This command is usually replied with an OK if the port and the module can connect correctly, else wise it comes back with a result code ERROR. 2. +CMGF: Used to setup the SMS mode. By adding 1 or 0 with the command text or. SIM800L is a minuscule GSM module that offers 2G GSM/GPRS data, and supports SIMCOM enhanced AT commands. Because it uses the serial communication method, it's easy to interface with the UART of almost all popular microcontrollers. There are 12 connections in total (6×2 rows) on the SIM800L module and, surprisingly, one row contains all of. You can send & receive messages using SIM800L with Arduino, even can you this GSM module with Arduino to make calls as well. In this way you can use this module in locations where you have no internet connection and far away from your spot. SIM800L HARDWARE. Most important part of the module is the Chip made by SIMCom.Its operating voltage in which it works fine ranges from 3.7 V to 4.4 V. Project with SIM800L GPRS Module and Arduino: Part 01 AT Commands in Arduino published on January 04, 2018 26 comments I hope this is a video that you are waiting for the most famous SIM 800 GSM module with arduino In this example, we'll use a DS18B20 temperature sensor, and we'll send a text message when the temperature is above 28ºC.Once the temperature has decreased below the threshold, we'll send another SMS alert. To send an SMS with the T-Call ESP32 SIM800L module, you just need to use modem.sendSMS(SMS_TARGET, smsMessage) after initializing a modem object for the SIM800L module (using the.

This document contains proprietary technical information which is the property of Shanghai SIMCom Wireless Solutions Ltd, copying of this document and giving it to others and the using o SIM800L. The SIM800L module is a small, easy to use GSM modem/cellphone. It may be controlled through a serial port using AT commands. They sell for less than $10. The documentation will refer to the ME. They mean the SIM800L module itself Users can also test the AT command under the 'Command Mode' tab of the AT Command Tester. If the RSSI value returned in AT+CSQ is 99, then it indicates that device has not found any network. Then the device cannot establish a voice or data call. It is better to check the signal strength before setting up voice or data call Hi guys, This post will give you an idea about how to locate the local tower location associated with your GSM transceiver. Almost all SIM800 series and SIM900 series support this functionality. So hook it up with your computer!! You will be needing a USB to TTL converter to connect the modem to a computer SIM800L V2 is a popular SIM module that easily used with Arduino. The version 2 has 5V pin enabled for power that make this module easier to use than the regular SIM800L. You can buy this device at link below (affiliate link) : In this tutorial, I will examine how to send SMS, receive SMS and make a call. You can find full video tutorial here

AT commands for SIM presence and status - M2MSupport

The AT command +CMGR (command name in text: Read Message) is used to read a message from a message storage area. The location of the message to be read from the message storage area is specified by an index number. The message to be retrieved by the AT command +CMGR does not necessarily have to be an SMS message بررسی دستورات AT Command ماژول SIM800L. در ابتدا طبق تصویر زیر اتصالات را برقرار نمایید. نرم افزار سریال مانتیور خود را باز کرده و باودریت را روی 9600 تنظیم کنید. وصل کردن ماژول SIM800L به مبدل سریا To create a TCP connection use the following series of commands, Set the APN parameters according to your SIM card network, Username and password are blank in my case. AT+CSTT=www OK. Enable the GPRS connection. AT+CIICR. OK. Check if we have been allocated an IP address. AT+CIFSR.

Read and Send SMS using SIM800L GSM Module and Arduino. April 28th, 2019 by cedcraftscodes. If you want to test your GSM module connected to your Arduino, there is a handy tool called AT Command Tester. Download AT Command Tester. Simply choose the COM Port of your Arduino and set the Baud Rate to 9600 then connect. You can test the GPRS. Receiving SMS messages using AT commands Introduction. Some advanced GSM modems like WaveCom and Multitech, support the SMS text mode. This mode allows you to send and receive SMS messages using AT commands, without the need to decode the binairy PDU field of the SMS first

SIM800L GPRS Module with Arduino AT Commands - Arduino

  1. g from a BMP085 atmospheric pressure sensor and will be using the SIM800L GPRS connection to publish this data to ThingSpeak. Contents1 Setting up ThingSpeak2 Using Putty for Testing3 Sending Data via GPRS Connection with SIM800L3.1 Wiring
  2. From there, you can check with thousands of AT commands and learn how to work with SIM800L module. Read more. Custom parts and enclosures . Wiring Diagram. Do not forget to use 1N4001 diode to give the power to the module. Schematics . Wiring Diagram. Do not forget to use 1N4001 diode to give the power to the module
  3. The following AT commands will be used to obtain the location information in DD format from the SIM800 module. AT command. Description. AT+CGATT=1. Connect SIM to GPROS. AT+SAPBR=3,1,CONTYPE,GPRS Activate bearer profile with connection type GPRS. AT+SAPBR=3,1,APN,RCMNET Set VPN for bearer Profile

SIM800L internet Connection Tutorial - AT Command List to

  1. Hello, I am trying to connect sim800L to my pc via a USB to serial converter. the following connections have been made, (Following which the gsm module was able to connect to the network (LED blinking 3 times)). - SIM800L powered by a 12V DC adapter via a dc-dc buck converter. (4.15V)-TX of USB to serial converter (5V) is connected to RX of sim800L(2.8V) via a voltage divider
  2. /* This code works with SIM800L Evb version, it sets the module on receiving SMS mode * And when the user sends SMS it will be shown on the serial monitor * The receiving mode is only set at the setup, you can later set the mode you want and check the AT functions you want * It's a basic code to test the SIM800L * Refer to www.SurtrTech.com for more detaims */ #include <SoftwareSerial.h.
  3. Sending SMS is quite easy, you just need to write some AT commands and write the message you wanna send and hit the Cntrl + Z and it will be sent. But receiving a text message on your SIM900 shield is a bit difficult because now you need to place a check when user will send a message
  4. The AT+CMGS command sends an SMS message to a GSM phone. In text mode this command is less powerful than in PDU mode but it is certainly easier to use. Command. Response. AT+CMGS=<number><CR><message><CTRL-Z>. +CMGS:<mr>. OK
  5. Learn about SIM800L GSM GPRS Module along with its Pinout, Antenna & Power Supply Selection, Wiring, AT Commands & Code for Sending & Receiving Call & SMS. sergeydavidyuk720014
  6. Perhaps a personal issue, but I can't get the library to work. I have a MEGA that talks via SoftwareSerial (10,11) to my SIM800L on 9600 using AT commands. So HW and SW Serial is OK. I uploaded your library in IDE and tried several examp..

First, enter the command line AT+CMGF=1 in a terminal program (for example, HyperTerminal in Microsoft Windows) to instruct the GSM/GPRS modem or mobile phone to operate in SMS text mode. This step is necessary because the default mode is SMS PDU mode. Below shows the response returned from Nokia 6021 to HyperTerminal after the execution of. Arduino/ESP32 SIM800. The SIM800 is a fantastic little GSM module for microcontrollers that has proven itself reliably for many years. This module is available as a separate small board (stand-alone) or in combination with a microcontroller such as the TTGO board or ESP32. The module is so popular because it can be accessed very easily with AT.

The differences for size, frequency band and function( SIM800 /SIM800A/ SIM800C / SIM800L /SIM800F/ SIM800H /SIM800C-DS). In order to satisfy users' actual situation and take advantage of the price, SIM800 is adopted methods of multiple schemes (e.g. SIM800, SIM800C, SIM800F, etc.) FEATURES PYP SIM800L. This topic has been deleted. Only users with topic management privileges can see it. E. Efried 10 months ago. last edited by Invalid Date. After updating the devices to V6.2 UIflow still offers only 4.5 or beta and the pyb library is not available to access the UART for operating the SIM800L. Any hints For sending AT commands and communicating with the SIM800L module, we will use the serial monitor. The sketch below will enable the Arduino to communicate with the SIM800L module on serial monitor. Before we proceed with detailed breakdown of code, connect your Arduino to PC, compile below code and upload it to the Arduino..

Controlled by AT Command (3GPP TS 27.007, 27.005 and SIMCOM enhanced AT Commands) Supports charging control for Li-Ion battery Supports Real Time Clock Supply voltage range 3.4V ~ 4.4V Integrated GPS/CNSS and supports A-GPS Supports 3.0V to 5.0V logic level Low power consumption, 1mA in sleep mode Supports GPS NMEA protoco Control via AT commands (3GPP TS 27.007, 27.005, and SIMCOM enhanced AT Commands) Supports SIM application toolkit: GSM 11.14 Release 99 Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32) GSM/GPRS. Band GSM 850/EGSM 900/DCS 1800/PCS 1900 MHz Quad-band auto search Compliant to GSM phase 2/2+ Enutting powe @Nicolaf899. I'm also planning to try it. I will follow the step by step tutorial from Random Nerd Tutorials (Rui and Sara Santos). Here is the link to their tutorial sending data collected from a BME 280 (M5Stack ENV unit) using an ESP32 to a MTTQ cloud AT+CMGD - Delete a Received Message. The AT+CMGD command deletes a received SMS message from the GSM modem. You can retrieve the index number of the message with the AT+CMGL command. Set the GSM modem to Text Mode SMS, list all received messages and remove the messages from the GSM modem. AT+CMGF=1 OK AT+CMGL=ALL +CMGL: 1,REC UNREAD. The Internet of Things (IoT) has been a trending field in the world of technology. From consumer electronics to business and industrial processes, IoT has changed the way we work. The SIM800 from SimCom and the Arduino UNO are highly recommended due to their popularity and support from the hobbyist and developers' community. The SIM800 is a cellular communication module that can make calls.

Arduino HTTP & FTP client for SIM800L/SIM800 boards to perform GET and POST requests to a JSON API as well as FTP uploads. arduino library json-api ftp http-client ftp-client sim800 sim900 sim800l. Updated on Apr 3. C++ SIM800L is a quad-band GSM/GPRS module, that works on frequencies GSM850MHz, EGSM900MHz, DCS1800MHz and PCS1900MHz. SIM800L features GPRS multi-slot class 12/ class 10 (optional) and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4 The T-Call ESP32 SIM800L board is connected to the internet using a SIM card data plan. The T-Call ESP32 SIM800L board publishes the sensor readings via MQTT and the readings are displayed in Node-RED Dashboard. Through Node-RED Dashboard, you can press buttons to send on and off commands to control the ESP32 GPIOs

Video: SIM800L tracking your IoT device - Marabes

Once connected, you should be able to send AT Commands and receive the response from Arduino. Sscom32E Serial tool. The following is the code snippet that we are making use of for receiving the AT commands and sending back the response through serial communication with the baud rate of 9600 Smart Machine Smart Decision SIM800 Series_AT Command Manual_V1.02 3 2013-10-23 Content The string. 23. Smart Machine Smart Decision SIM800 Series_AT Command Manual_V1.09 23 2015-08-03 shall be ignored since it is used for synchronization with PC tool. Only enter AT Command through serial port after SIM800 Series is powered on and Unsolicited Result Code RDY is received from serial port Sim800L general specifications (GPRS Integrated module) § Quad-Band GSM 850/900/1800 / 1900MHz § GPRS multi-slot class 12/10 § GPRS mobile station class B § GSM 2/2 +FM frequency between 76 MHz and 109 kHz adjustable by step 50AT command set support (3GPP TS 27.007, 27.005 and augmented by SIMCOM AT) § Class 4 (2W at 850 / 900MHz

http - sim800 at command post data to server - Stack Overflo

Introduction to SIM800L There are so many GSM modules that came to market right now. And SIM800L almost the cheapest. It cost under 10$ and has the same feature as other. So, this module is a great one. This module works just like another module, it uses AT Command to communicate with arduino and has the same command Link the SIM800L TXD to the Raspberry RXD. Link the Raspberry's RXD to the SIM800L TXD. Send and receive data with AT commands on the serial port. Only here, all this is the theory, but you will see that in practice things are a little more complicated The reality is, why is it difficult to plug in a SIM800L so i had 2 SIM800L modules here for project. On my modules VCC was connected to 5VDC line passing through a single Shottky diode. According to Wikipedia: Schottky diodes' voltage drop at forward biases of around 1 mA is in the range of 0.15 V to 0.46 V. So the resulting voltage on the Vcc pin in my case was 4.7V gprs commands: command description. at+cgatt attach/detach from gprs service at+cgdcont define pdp context at+cgqmin quality of service profile (minimum acceptable) at+cgqreq quality of service profile (requested) at+cgact pdp context activate or deactivate at+cgdata enter data state at+cgpaddr show pdp address at+cgclass gprs mobile station. AT Commands Examples - Application Note UBX-13001820 - R13 Contents Page 8 of 153 1 Introduction This document provides examples of using AT commands. See u-blox AT Commands Manual [1] for the AT command descriptions. The following symbols are used to highlight important information within the document

Accordingly, 2.7 V will be enough, and 3V is already risky. If you look at the datasheet reference voltage SIM800L: 2.7V - 2.9V. The minimum value is 2.7 V as Zener diod supply. I just say that I use a simple schematic with resistive divider. Connect SIM800L to ESP32 Devkit 38 pin. Mini 360 DC-DC step down converter Aspen SIM800. Communication. A comprehensive SIM800 Series library for simplified and in-depth chip access. This library provides wrapper methods for all AT commands defined in the official SIM800L manual, many helper methods to work with returned replies, advanced serial timeout functionalities, and also methods to directly communicate with the chip. Full library documentation and numerous. Just trying to test e-mailing using the AT commands in the pdf manual. I do not have any ethernet shield, that's why I'm trying to send e-mail with AT commands ! My problem is just I don't understand how to send AT commands, like manually (by hand), to my SIM800L Connect the SIM800L VCC and GND to your power source terminals. Connect TX to Arduino 10th digital pin, RX to arduino 11th digital pin. Download the code, I linked in this step. With the code, you can send commands, and get them back, on your Serial Monitor. Some simple commands: AT --> Returns OK, if connection is OK SIM800L Claro Argentina AT Commands Raw. SIM800L_Claro_Argentina_AT_Commands.md Objetivo. El presente GIST es para ordenar un poco todo lo que me costo hacer andar el modulo SIM800L y los malvados comandos AT. La persona que escribe esto no sabe mucho mas que lo que vé acá. Seguramente haya comandos inecesarios, otro tipo de errores y.

command combined with other parameters can be set up in the communications package or typed in manually as a command line instruction. AT Commands Reference Guide 80000ST10025a Rev. 0 - 04/08/06 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Right reserved page 7 of 614 3.2 AT Command Syntax. SIM800L has two power saving modes: Minimum functionality mode and sleep mode. AT command AT+CSCLK=1can be used to set SIM800L into sleep mode. AT command AT+CFUN=<fun> can be used to set SIM800L into minimum functionality. When SIM800L is in sleep mode and minimum functionality mode, the current of module is lowest To test the module, connect the SIM800l module to your system with the help of Arduino ==> Open Arduino IDE after this select the com port ==> Open the serial monitor ==> Enter the following AT commands. AT: If the Sim800l module is functioning properly then Sim800l will reply OK after receiving this module Sponsored by: DigitSpace Product used: SIM800L Module Replace SIM900A GSM GPRS 5V Serial with Antenna If you're looking for send and receive SMS you may check this. Hello, and welcome to another easy and step-by-step tutorial, this time we're about to see how to send SMS/Text from the Arduino Uno board to your phone using SIM800L module, we gonna see how to send a simple text, then we're.

Description. SIM800L is a cellular phone module, integrated SIM800L, a GSM/GPRS module, only cpmpatible with 2G network. if you want to integrate a cellular module into your design with vioce, text and SMS, this hand-solderable module is pretty nice!. Product Features. 3.5 mm phone audio jack; MIC (MIC is disable by default. To enable it, you will need to weld a 0 ohm resistor at MIC-EN Library SIM800l Module for Arduino UNOThe Purpose of This library is to use the module in the most easy way and transparent.Website: Download and Install.Go to click the ' Source Code (zip) ' button, then rename the uncompressed folder to Sim800l.Check that the Sim800l folder contains Sim800l.cpp and Sim800l.hGo to arduino IDE Sketch Import Library add library

Accepts AT Commands; SIM800L is designed with power saving technique so that the current consumption is as low as 0.7mA in sleep mode. Specifications: Power supply: 3.4V ~4.4V; Power saving: typical power consumption in sleep mode is 0.7mA (AT+CFUN=0 ) Frequency bands: Quad-band: GSM 850, EGSM 900, DCS 1800, PCS 1900. SIM800L can search the 4. I checked everything hardware-wise, thingspeak-wise and gone over the at AT commands to try and find the problem. To make things simple, I just use the arduino to communicate with the SIM900 board and input the AT commands by hand from the serial monitor in order to check for problems. I can connect to the telecom network just fine and have a. The SIM800L is available in Pakistan. Sim800L is a cheap and portable GSM module breakout board with all the capabilities of the larger SIM900 gsm module and shields. Smallest SIM800L GPRS GSM Module has a microSIM card core board quad-band TTL serial port. This is a GPRS GSM module based on the SIMCom SIM800L, which is a GSM GRPS Quad-Band module SIM808 - Using GNSS for location tracking. elementzonline / January 18, 2016. SIM808 is a new Quad band GSM modem with GPRS, GPS and Bluetooth functionality. This small module is a great platform to develop location-based tracking device. SIM808 has GNSS receivers with the following features. 22 tracking /66 acquisition channels. GPS L1 C/A code

SIMCOM SIM800L is a quad-band GSM/GPRS module, that works on frequencies GSM850MHz, EGSM900MHz, DSC1800Mhz and PCS1900MHz. SIM800L features GPRS multi-slot class 12 / class 10 ( optional ) and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4. * Audio channel which includes two microphone input; a receiver output and a speaker output Sim800l Delete All Sms. Sim800 At Commands. Read Sms In Sim800l. The CALL READY message from the SIM900 indicates that the modem is powered up and has acquired a valid network. Next thing is to make sure you have set the SIM900 into TEXT mode by sending the command AT+CMGF=1; followed by a carriage return (rn)

1. As you key-in c : to make a call, gsm will read the ATD command and make a call to a phone number you have upload in your source code.(Picture 1 and 2) 2. When you key-in h : to disconnect/hangup call, gsm will read the ATH command and disconnect the connection.(Picture 3) 3. When you key-in e : to redial, gsm will read the ATDL command and redialing previous number it has called.(Picture 4 Set command. During particular operations, certain configurations must be modified. These commands are used to set or change the configurations of the mobile phone or the modem. Syntax: AT<command name>=value1,value2,valueN. Eg: AT+COPS to change the GSM network or AT+CBST to change bearer service type or AT+CSCA to change SMS center address I tried these commands: at+cgatt=1 OK at+cgdcont=1,IP,bsnlnet OK at+cstt=bsnlnet OK at+ciicr ERROR +PDP: DEACT I have enough balance in my Sim card, activated for gprs, full network range. I used the same commands for the other sim cards and is working properly. Also, another bsnl sim card is also working AT (ATtention) commands are instructions used to control a modem. Firstly, AT+CIPMODE=0 sets the TCPIP application mode to normal as this is necessary to govern the connection of the SIM800L to the Internet. Secondly, AT+CIPMUX=0 starts up a single IP connection and AT+CGATT=1 attaches us to the GPRS service I am using a Sim800L GSM module, and a serial USB device to send the commands to module from my computer. Later on, I will use the commands on Arduino to register my device. I'm sending following command to GSM Module: AT+CIPSTART=TCP, [my-org-id].messaging.internetofthings.ibmcloud.com,my-port. And I get the following output The SIM800L supports quadband frequencies of 850/900/1800/1900MH. By using this module you can easily transmit voice, send SMS, and access the Internet. When you power up this module with a power supply of 3.8-4.2 Volts the LED present on the board will starts blinking. If it is blinking very fast that means SIM is not registered to any network