SIM900A GSM Module and Arduino: Sending and Receiving SMS Using AT Commands

In this video we will going to learn How to send and receive SMS through SIM900A gsm module Using Arduino and AT commands.
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[@nagajothisundar8479]

nagajothisaravanan very clear explanation.i bought same type modem,with 12v power supply connected. using usb to ttl converter,i can not communicated with the modem using putty in all baud rate. what is the default buad rate of the modem. please reply waiting for your reply. thanks.

[@technolabcreation]

Hey thanks for your comment

[@technolabcreation]

The default baud rate of sim 900a is 115200

[@technolabcreation]

GSM module is little sensitive so some time it doesn't work properly Try again, it definitely work

[@nagajothisundar8479]

thanks for your responsible immediate reply.thanks.i will try .

[@technolabcreation]

Ur welcome

[@mukul4223]

Thank you for such a clear explanation, was facing some issue but I solved it because of this video.

[@luckymaurya4900]

Very knowledgeable video.... And explanation in English language is also very good...... Keep it up 👍👍👍👌👌👌👏👏

[@technolabcreation]

Thank you brother

[@mythrijl6927]

very good video .very well explained .i got it hurray!!

[@markusmulholland]

Thanks man, great video.

[@coorgcoorg1464]

bro u are awesome love u da thanks a lot for the explanation.

[@hrick159159]

u save my life sir, thank you

[@PriyankaSingh-pr6ts]

very good explanation.....keep it up.

[@technolabcreation]

Thank you

[@yaaro713]

Crystal clear explanation!!! Thanks 😊😊

[@technolabcreation]

Always welcome

[@zthalin6472]

Thank you for the information sir!!

[@SunitaRani-sr3pj]

You nailed it Man...! the code worked Thanxxx Man for helping.... You just got 1 new Subscriber....

[@technolabcreation]

Thank you

[@shubhamshukla167]

nice video! keep it up champ

[@technolabcreation]

Thank you Sir I'M very happy when ever u appreciate me

[@milindsingh07_11]

Boommm!!!!!! ☺☺☺ keep it up bro.!!!😊😊

[@technolabcreation]

Yup..... thank you 😍😍

[@deepakkrshaw31]

Hello brother! First of all thanks for making such a informative video. I am facing a problem while connecting my 900a module with Arduino. The network led is not blinking or turning on. My SIM also support 2g in phone. Now when I programed to find my Gsm IMEI no. then it showing "0" . When i call from another no. It shows it is ringing at calling side. My Gsm module is same as in your video. I tried all such steps. 1. Giving sufficient power supply 12v 2A 2. Switching different sim card. 3. Tried AT commond. 4. There is not any PIN no. Lock there. So please help and reply.

[@yogeshitaliya473]

😍😍😍😍

[@ShivamSingh-fj7mw]

awsome sir 👌👌👌

[@technolabcreation]

Thanks yrr

[@JKROBOTICS]

👍

[@norbuwangdi7968]

Thanks for the video sir. But the NWT indicator is blinking every second which means that it is not registered to the network. How can we register to the network?

[@aviralyt3889]

What coading is doing if we send the mess to former to complete the watering in field plz tell me

[@user-cf2by6no6k]

Hi sir, please how were you able to receive the messages on the empty phone when the SIM card is removed and slotted in the GSM module connected to the Arduino. Am confused.

[@manishmaheshwari2220]

i have to know that is this device (SIM900A GSM GPRS Module with RS232 Interface and SMA Antenna) can be connected to PC through RS232 Cable and detected by Windows as Modem ? for Sending FAX

[@user-yq5vx4tr1j]

i got some hardware issue while connecting gsm with lipo battery, inboard capacitor of 680uF got burst. Is there any possiblity for its working if i replace the capacitor with new one?

[@technolabcreation]

What is voltage rating of capacitor??

[@jitendrakumardash3142]

Sir,pls make a video on "how to make digital fuel pump using RFID and GSM module"pls pls pls.

[@divyanshsharma3148]

Thanks a lot bro ❤❤

[@technolabcreation]

❤️❤️❤️

[@tejashreeshelar9245]

thank you

[@mohanaacharib5149]

thank you sir

[@technolabcreation]

Ur welcome

[@tonygonzalez3573]

Great video, question... does the SIM card need to be activated? Or can u use a brand new SIM card and sms text from it? You said it needs to be 3g? What exact pieces do I need to buy, where did u get yours.. plz list app u need to buy for it to work.

[@increpeiottrainee8295]

You required 2G SIM only and SIM card contains no storage then it will work properly

[@ankitchhipa6148]

And sir only power light glow network is not blow sir i will try in putty software using AT command which cammand for call gsm to mobile?

[@shivamchavan2548]

i am not able to send message on my phone plz help. I used the same code and used an idea sim still it is not working plz help

[@harishs7384]

Tx bro

[@elabinnovations]

Please upload tutorial video of Bluetooth of this GSM module

[@girishchandra2236]

I am able to receive message in mobile but in serial monitor(9600 baud) nothing is printed ie on txn as well as reception.

[@rakarlove1974]

sir I use sim 900a with arduino and i try this code to check gsm modem and my gsm network is already connected but when I type AT in serial monitor i get no response and aside from that i dont get to see what i send from the serial monitor.Sir can you advise me how to do this ok

[@shashih9130]

can i use the sim 900l with esp 32?

[@harishankarchowdhury4367]

Hi.. I am using the same module. Just need to know is it mandatory to connect external power supply to gsm module. Can't we take 5v line from arduino to ' VCC' pin of gsm module?

[@technolabcreation]

No you can't take Power from arduino because ...gsm need much more current,

[@natalielin7261]

What can i do for you ? Hi,If you need any help pls let me know. I can offer free tech support for you . By the way let me introduce our Gsm modem sms device : Hot selling in UK/USA/Mexico/Indonesia ... Offer free tech support and inquriy , 1.GSM 900/1800/850/1900Mhz Quad band 2.IMEI Change 3.USB optiona 4.AT Command 5.Free software (SMScaster) 6.Speed 700-900sms/Hour 7.8/16/32/64 sim slot reliable . 8.Warranty: 12 months, provide free 7/24 tech support 9.Support 2G 3G 4G SIM ---------------------------------Hotline-------------------------------- Natalie Lin Whatsapp/ Wechat/ Zalo :[phone] Skype : live:6bac679d890c89a2

[@soumalyaaich8978]

Please can you upload the code for GPS also??it will be very helpful for

[@TouhAhmed]

Merci

[@user-cf2by6no6k]

Hello sir, please how were you able to receive messages on the phone? Wa the SIM CARD defined in Arduino code different from the SIM CARD inserted? Because removing the same SIM to insert into the Arduino Connected GSM module means I have an empty phone with no SIM CARD and I will not be able to receive messages on this phone. Please I need your clarification❤. Thanks

[@technolabcreation]

Watch this video SIM900A GSM Module & Arduino: Sending/Receiving SMS & Making Calls Using AT Commands | NextPCB. kzbin.info/www/bejne/bIGwYZJ8edOLfaM

[@biswajitkumardash6421]

Thank you, I was looking for something like that. But, I want to use ESP8266 NodeMCU ESP-12 E module with Arduino Uno board. I want to send AT command via Arduino Sketch instead of serial port. In that case, what will be the TX, RX pin connection? It would be a great help.

[@technolabcreation]

Same connection as in video

[@biswajitkumardash6421]

@@technolabcreation Thank you. Yeah, this is working. As the ESP8266 NodeMCU has its own built-in MCU, if I want to use only ESP8266 NodeMCU module (not with any Arduino board) is this possible to send AT command via Arduino code instead of serial port. In that case, maybe I do not need to use the serial software library. Is there any idea in that case what will be the code looked like?

[@technolabcreation]

Yes it is possible .. watch another video of mine on gsm module

[@biswajitkumardash6421]

@@technolabcreation Hi ! I found some videos on GSM module, but didn't find the specific one which you are talking about. Can you provide me the link of the video?

[@anudipttade411]

while I send the message to the no. error is showing in monitor and no mssg is going so what to do?

[@zigoto213]

Hi, Thanks for this tutorial. I want to use this type of solution to manage the usage of an Air Conditioner: 1. Receive an SMS when the A/C is switched on. SMS message should contain an account number + date / Time + "A/C on" 2. Ability to send an SMS to disable the A/C from starting 3. Ability to send an SMS to enable the A/C to start What are the reference in the web that could provide me with some details regarding this project? Thanks in advance for providing any hint/ advise/ pointer to other recources

[@ratiknayar1687]

kya GSM notice board..main..TV monitor use kar sakte hai ?

[@rajanpal6041]

If we have to make so many products like this then we need so many sim card which is not possible for one person so what will we do in this case

[@Tarunkumar-fb5io]

Will it work with raspberry Pi Pico w.?

[@mal8240]

Sir does the gsm module be able to send if the phone is far away? Or do you need an external antenna?

[@technolabcreation]

gsm module work same as our phone ....it work anywhere from world

[@PrasannaMadiwar]

Can you help me to maje a program on turn on and turn off the motor using Sim 900a ad ardino uno

[@technolabcreation]

Check out this video Turn Motors On/Off with Your Phone through Miss-Call! Arduino GSM Module Automation Tutorial. kzbin.info/www/bejne/rYLWaZ2ppM2dh80

[@spurthynaidu4365]

Hey, I tried the functionality of gsm with the code which was given in link. N it worked well a week back. But now while sending message, the output is coming in serial monitor but the message is not being received at the receiver end n in serial monitor it showing 'ERROR'.What will be the issue in it?

[@technolabcreation]

May be sms plan of your sim card is ended

[@kaushalshrivastava364]

What will happen if we join 5 v from arduino uno board to A2 pin of same Arduino uno board, will it be short circuited or will it be use to read voltage if using proper serial monitor?

[@technolabcreation]

If you use proper serial monitor you able to read voltage reading. And nothing happen if didn't define that particular pin ...means no short-circuit.

[@kaushalshrivastava364]

@@technolabcreation Thankyou

[@natalielin7261]

What can i do for you ? Hi,If you need any help pls let me know. I can offer free tech support for you . By the way let me introduce our Gsm modem sms device : Hot selling in UK/USA/Mexico/Indonesia ... Offer free tech support and inquriy , 1.GSM 900/1800/850/1900Mhz Quad band 2.IMEI Change 3.USB optiona 4.AT Command 5.Free software (SMScaster) 6.Speed 700-900sms/Hour 7.8/16/32/64 sim slot reliable . 8.Warranty: 12 months, provide free 7/24 tech support 9.Support 2G 3G 4G SIM ---------------------------------Hotline-------------------------------- Natalie Lin Whatsapp/ Wechat/ Zalo :[phone] Skype : live:6bac679d890c89a2

[@DIYTECHNOSTORM]

Very informative . I have gsm 800C will this work on that as well?

[@technolabcreation]

Yes ..800c will also work

[@mohdibrahim5018]

Sir please make video or mail me gsm and arduino based health monitoring system.i watch all of your video and comments it you reply me

[@subhashcherian333]

it work for me

[@sreekanth252]

is the code and connections same for arduino nano and will 4G sim work with sim900a

[@technolabcreation]

Yes the code and connection is same for nano too and this SIM900A works with all the simcard except JIO.

[@ankitsingh1978]

In my gsm kit only power LED is working and network LED is not working and we are giving prefect power supply 12 volt 2 amp dc power through adapter what can i do for get network LED on.

[@technolabcreation]

If ur network Led is not blinking Then maybe ur module is defective

[@maibtish9983]

Is there is a way to make this portable? maybe a battery and a current regulator? using an adapter is not an option I can consider

[@technolabcreation]

Yes make it portable ...by using lipo battery

[@maibtish9983]

Technolab creation How much voltage? and is the battery enough? no current regulator?

[@technolabcreation]

About 12volt and 1 amp

[@shortandsweet8628]

Please share how we can send text of sensor value from sim900 in case of any sensor we are using in uno

[@technolabcreation]

Checkout my other video

[@eversonbron9432]

it is possible to send sms to an inputted phone number from website and send it using that arduino and gsm module??

[@natalielin7261]

What can i do for you ? Hi,If you need any help pls let me know. I can offer free tech support for you . By the way let me introduce our Gsm modem sms device : Hot selling in UK/USA/Mexico/Indonesia ... Offer free tech support and inquriy , 1.GSM 900/1800/850/1900Mhz Quad band 2.IMEI Change 3.USB optiona 4.AT Command 5.Free software (SMScaster) 6.Speed 700-900sms/Hour 7.8/16/32/64 sim slot reliable . 8.Warranty: 12 months, provide free 7/24 tech support 9.Support 2G 3G 4G SIM ---------------------------------Hotline-------------------------------- Natalie Lin Whatsapp/ Wechat/ Zalo :[phone] Skype : live:6bac679d890c89a2

[@The_midnight_motivator]

Can't we use the incoming msg to activate something in our houses...if we are far away

[@technolabcreation]

Yes u can do that

[@mightyparrot4447]

hello bro you are not using the case "r" but you get the sms received how is this possible, are we dont need to mention r command is it works automatically

[@technolabcreation]

Yes it will work

[@NEERAJ_MAURYA0609]

Why tx0 and rx1 pin creates problem during uploading program. I am asking this question because I am also getting this problem during problem update on Arduino board...................

[@technolabcreation]

Rx and tx. Pin is internally connect with usb port If u connect another peripheral module with rx & tx then arduino will communicate only with that module not with PC

[@dhirendra78joshi]

I've a reliance classic 2258 cdma pnt Wireless phone and I want to to covert it in GSM, please help me

[@niharikaerigineni8501]

Hello sir I used and developed a GSM based hms. Previously it sends SMS and when I am checking my kit with same code it is not sending SMS and serial monitor is also blank

[@technolabcreation]

Yeah this is frequently occurring problem Because GSM module is very sensitive, just disconnect the all things and re-upload the code , First power up the GSM module wait until gsm module is connected to the network then Arduino to it , then it must work properly..

[@niharikaerigineni8501]

Technolab creation tq but it is not working

[@technolabcreation]

Retry it must work

[@divyalalitha7890]

should we use only 12volt 2ampere adapter.i am using 12 volt 1 ampere adapter and the code is not displaying any ouput.should i change the adapter?

[@technolabcreation]

Yes ... please change the adapter?? Otherwise it will not going to work.

[@divyalalitha7890]

@@technolabcreation thank you so much for the quick reply:)

[@technolabcreation]

Most welcome

[@fundamentalphysicsclasses1051]

Sir can we use 4G SIM also in sim 900 a mini GSM module or we can only use 2G SIM with it

[@technolabcreation]

Yes you can use 4g sim which has 2g services., In india except jio all other provides 2g services along with 4g .

[@TheGamingWorld-tr9fm]

Sir..... can you make using these module ...for farmer .to help ......by making nutrients level cheking for field ........automatic and message to our phone......??

[@technolabcreation]

i have video on this concept please check out.

[@Nogom]

How to design a circle gsm sim900a Infrared Object Detection Sensor and arduino to To send a SMS on the mobile Please reply and help

[@teja2647]

Once we remove and connect power supply to gsm,code is not working.Printing some garbage values in serial window if we send sms to gsm.please tell me the solution.If power is not removed,working fine.Problem comming when power is disconnected and then connected.Helpful if u give reply as soon as possible.Thanks in advance!!

[@technolabcreation]

When you remove power from GSM then at that time remove the tx pin wire also.

[@kaushalshrivastava364]

can we get a message if an LED at remote location is ON/OFF if yes then how

[@technolabcreation]

Yes...and I have video on my channel on this concept

[@harshinisenthilkumar5336]

Also should only 12V and 2Amp supply be given? Because I tried with 12v 1 amp supply and the code wasn't working!

[@technolabcreation]

Yes this module power sensitive....so must provide 12volt and 2amp power supply

[@harshinisenthilkumar5336]

@@technolabcreation ohh thank you so much!

[@technolabcreation]

Your welcome

[@sj-bp7rg]

Sir making calls using gsm modem is fine but if try to speak will it tranmitts our voice

[@technolabcreation]

Yes it will transmit our voice just like a normal mobile phone. We have to just connect speaker and a mic. And little modification in code.

[@norbertantal1723]

Hello is the sim900a module compatible with Digi/Orange/vodafone? Cause i have Digi and it won t connect to network

[@technolabcreation]

Sim900A is compatible with any simcard which has 2g services

[@vineethakadavakollu7660]

Bro I need interfacing of gsm with msp430f series....could u help me in coding

[@faizanalam1646]

To send a message with the gsm module we need to have balance in sim ?

[@technolabcreation]

Yes

[@kudakwashedzorani7576]

hie, how do i store the messages received in a variable

[@mugimoto2846]

The network led just keeps on blinking fast, any tips on how to make it establish network or make it slow like in the video?

[@technolabcreation]

Use 2g sim

[@amityadav-zy4jk]

Sir, i am working on gsm 900. It is able to make a call, but it is unable to send msg. Please give solution for this problem

[@k0pR0LiTh0s]

You have never used the case 'r'

[@shalvityagi7002]

i have GSM module as urs but my GSM module gets connection for few seconds and then the connections are lost.plzzzzz help me out

[@technolabcreation]

I also faced this problem many times....but I fixed it, all u have to do it , first powered the GSM module then connect the Arduino to PC..,then it will work perfectly, there is a voltage regulator chip that creates the problem.

[@ak1606]

Sir Kya hum is se aysa ker sakte hai ke hum ne massage kia or really me IMEI number or status show ho

[@engineered.mechanized]

Can I call from my phone to the GSM module to turn on/off an electrical device?

[@technolabcreation]

Yes very easily

[@engineered.mechanized]

@@technolabcreation Thanks. I will give it a try.

[@EssayWriting-du3pw]

My sim900a gsm module can't connect to the network, what might be the problem ?

[@technolabcreation]

Check your power supply and make sure to use 12volt and 2amp

[@harshinisenthilkumar5336]

What sim should be used? Is it necessary that it has to be only a 2Gsim?

[@technolabcreation]

Sim900a is only compitible with 2g network, so you can any simcard that has 2g services. In india except jio all sim have 2g services.

[@harshinisenthilkumar5336]

@@technolabcreation thanks a lot!

[@premalupadhyay3555]

How do I perform particular task after read msg like SMS = open then door open and SMS = close then door will be close...

[@technolabcreation]

kzbin.info/www/bejne/nISmqoV_nq2HeKc Follow this video

[@thaskarthaskaran1425]

Can we do it without arduino , like with atmega 168pin avr studio

[@technolabcreation]

yes you can do.

[@thaskarthaskaran1425]

@@technolabcreation can u please show it video or website

[@ankitchhipa6148]

Sir please help me I am making this project but my network led is not blinking and not blow When I connect 12 volt dc perfect voltage to GSM module 900A and one more things my GSM module is heating please help me sir I'm use 3g sim is working ok or not?

[@technolabcreation]

First of all disconnect everything (Arduino from GSM module) then Insert your sim then power supply plug . U can use 3g sim if it has 2g services. If you connect the Arduino with module without giving power supply to GSM module then there is a power regulator ic that will heat up..

[@nanip3946]

Hey bro! Thanks for the video. It's clear and perfectly explained. But I have some problem. I see reversed question mark when I open serial monitor. baud rate is 9600. Both in Serial and in code. But it is'nt working. Thanks in advance man!

[@vargheseselestin5552]

Bro I have also this problem Can you solve the problem now?

[@Rohitsingh-bh8mp]

Same problem here! and message is also not transferring

[@mdsaliyaparveen4212]

Make sure that jumper wires connected properly... It may be one of the reasons for ¿¿...

[@saigowtham129]

Sir i used gsm sim 800c I interfaced with arduino uno but my mobile is not receiving messages from module

[@technolabcreation]

Check SMS plan in your sim card that you inserted in GSM module.

[@englishinsambalpuri9364]

When sent sms error shows . Please help me,,

[@surendrachowdary30]

Received msg is not displayed in serial moniter what i can do sir

[@maheshkumarvarma7326]

If we are use ultra sonic sensores for detect object then send sms give me block dia.and coding

[@technolabcreation]

Okk

[@santjyoti]

Hi, can you please let me know how can I send massage if any input is come n any pin of aridiuno.

[@technolabcreation]

I had made video on that check them

[@balancedlifewithdeeksha4356]

can gsm 900 A be powered from arduino uno board 5v pin

[@technolabcreation]

No ....gsm required higher voltage and current. So you have to Power up GSM module by external Power adapter

[@balancedlifewithdeeksha4356]

@@technolabcreation can we use 3G BSNL sim in gsm module 900A with Arduino

[@quickgamerz9388]

Can we able to display all msg which is received from other phones ?

[@technolabcreation]

Yes you can display

[@Mruie_34]

1:56 you connect digital 10 to what? And where the coding it doesn’t show for me in description

[@Mruie_34]

I have SIM800C it’s a little different can you help me with it?

[@Mruie_34]

I have a project that is the flex sensor will be on the jacket and when it’s get curve it should make sound using buzzer and then send report sms to phone if you can help me with it, thank you

[@mojicajohnalexes6553]

my serial monitor is not working.whatever message i sent "s" or "r" nothing is happening...

[@jagrutipatil7912]

sir,can u upload the video of GSM by using raspberry pi b model

[@technolabcreation]

Yes very soon

[@agithgopi968]

sir as you say my gsm module is blinking correctly and i change bauld rate in serial monitor . now also i am not getting message ,the tx and rx pin of the arduino mega 2560 is not blinking please help me when i uploded the other program to my arduino it is blinking and working properly

[@technolabcreation]

Please let me know Which program u uploaded to your board

[@technolabcreation]

Your own Or mine program

[@yashdewangan9728]

Hi, I just want to know that is there any method by which we can take the mobile number through which message has been sent to the gsm module, in a variable.

[@technolabcreation]

Yes it is possible

[@yashdewangan9728]

@@technolabcreation Thanks sir for reply. What will be the code for it...?

[@LSE8885]

Can use this pcb for 12v appliances

[@technolabcreation]

Yes you can use

[@thullarakesh7971]

bro i want the code for an operation of load on/off using sms i brought uno and gsm 800l for example we msg '"LOAD ON '"then it should be on and reply us that ur load was on and simultaneously at LOAD OFF

[@technolabcreation]

Okay contact me WhatsApp [phone]

[@SanjeevKumar-hl9ql]

Can you provide link of GSM module Charger please?