Відео

Glad it was helpful!

Hi. Thanks for watching the video. As far as I know, SIM 900 does not support 4G SIM cards. You can check for that with the manufacturer. Maybe you could try to place another SIM card in that SIM 900. Or you could buy another SIM 900 module. And do make 100% sure that your carrier (C-cell) supports 2G/3G bands. And, as per my knowledge, SIM 900 work only for 2G bands, and carrier support for 2G band is becoming very-very less. As far as I know, carriers these days have stopped supporting those bands. Pls, do reach out if you need further assistance! Best, IAMDR7

@@JimyFlips thank you so much for the response, I will definitely reach out if I have a problem again.

tried... but failed....

Hi! KD, how can u tell that it is accepting calls?

@@JimyFlips because when I power it on and call on the inserted sim card after 2 rings gsm answers the call

​@@karandahiwale8770 I mean it must be having some programming/linking with arduino if it answers the call... means it would be surely communicating with arduino... do u have it programmed/linked with arduino?

@@JimyFlips yes when I. Connect sim800 to. Same arduino it works and when I changed arduino to sim900 it accepts call but does not responds to at commands

@@karandahiwale8770 Sorry... but I may not be further helpful! Thanks for contacting me. But, one last thing, I have still not understood how can you be sure that GSM is accepting call?

I have used Airtel sim still it's not working

Hi. Thanks for watching this video. As I have already mentioned in my video, you might have made an error in connecting the wires earlier. Once that connection error is made, the GSM blows off! Go, buy a new one and take care next time. Best, IAMDR7

You might be having a modded GSM unit. Thats why probably. Otherwise you must be having a good luck.

Hi. Thanks for reaching out! Just check if your SIM Card is 4G or 3G. A 4G sim usually does't work with the current versions of GSM modules. If you have a 3G "old" SIM, you are good to go with your GSM module. And, if its still not working then there must be some issues with the GSM Module itself. One more thing, even if you connected the wrong terminals once anytime, your GSM's life is over even though you connect it correctly the next time. Best, IAMDR7

Hello. First of all thank you for watching this video. It would be really good if you can type your code here on the comments section. No need to type the whole code, just type the part where msg function is involved. If you don't want to type any code, I can probably suggest tweaking the following: 1. Try to change font of serial monitor, because some characters can mean different things in different fonts. 2. Review your code line by line. Hope it helps! Best, IAMDR7

@@JimyFlips void SendMessage() { mySerial.println("AT+CMGF=1"); //Sets the GSM Module in Text Mode delay(1000); // Delay of 1000 milli seconds or 1 second mySerial.println("AT+CMGS=\"+91xxxxxxxxxx\" "); // Replace x with mobile number delay(1000); mySerial.println("I am SMS from GSM Module");// The SMS text you want to send delay(100); mySerial.println((char)26);// ASCII code of CTRL+Z delay(1000); } this is my code

change the baud rate in serial monitor

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Yes. This happened with me. I destroyed 3 such GSM Modules by this holy mistake. If you have done so, you may use it as a bluetooth module also because such GSM modules have many features built in. Go and discover about those on the web! Best, IAMDR7

Hello, thank you for watching my video. Answer: Yes, these 4G SIM cards are not supportable with the GSM SIM module - unfortunately. If you have a 3G/2G SIM, you are very lucky and fortunate enough to use it with your GSM module. You may hover over the internet to find how you could use a 4G SIM with a GSM Module (Arduino). Best of Luck! Stay Creative and Happy!! Best, IAMDR7