how Send SMS to multiple recipients using Arduino & gsm module. when button press send message to multiple recipients.
You may be able to set each number you are sending to as individual strings however i don't know what libraries/hardware you are using so you'll have to be more specific I'm afraid.
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Trying to call or send sms to a number that's not a phone number with sim800l via arduino results to an error. Does anyone knows how i can send an sms to a three digit number(for example, a network provider's number.). I need it for a project.
Can I assign a text message sent from my gsm module to a variable in Arduino code?
I have tried to work on sending SMS to gsm module from my mobile phone. I want to write a code to send sms to GSM module and assign the variable to a defined variable in Arduino code. For example sending sms to assign password and ssid for WiFi Manager.
Yes you can. Read more about how to use GSM with Arduino here.
I already used to command a GSM Modem through an application that i programmed in JAVA (Serial communication) in order to send/read SMS.
Now i would like to make an application that send a request to the operator in order to transfer credit from an account to another.
Basiclly in mobile phones, we usually go write something like this ' *220*recipientN°*amount# ' and then confirm and the recipient reseave the amount of credit.
I was wondering what kind of AT-Command to use for such purpose, or is it simply one by sending an sms containing what i just wrote above to accomplish that ?
Thanks in advance.
I was wondering if it is possible to send via GSM protocol and appropriate AT commands, few data through a simple GSM call (witout using data traffic).
For example my system is a PIC + GSM Module and it monitors and processes a string of data.
When the user wishes, he makes a voice call in order to interacts with the GSM module via DTMF commands for example via an APP.
My dubt is if the GSM module is able to send the data to thesmartphone in order to monitor the status of the system. The module is a Quectel M95.
During some investigation, I saw that the module can send USSD codes but I don't know if it's possible to customize the USSD and read it from the smartphone as I wish.
Or maybe is it possible to use the FAX for data exchange?
Thanks everybody in advance
Marco
There are a couple of alternatives if you want to avoid using data traffic. But they all require either a connection to a service that is capable of receiving SMS's for example Twilio. Or you can of course have a GSM Module connected to your server which could do the receiving.
You could then send your data and requests for data within an standard SMS body. Or alternatively you could send binary SMS's where you are not limited to the 7 bit character set.
USSD would only work if you have a USSD service provider (I think Twilio has this now). Because the USSD service must initiate a USSD session for your target GSM Module to respond to. USSD code sending for GSM Modules is operator specific and therefore you are limited to what they have implemented (usually for prepaid users and the topping up of accounts).
I have my servlet that has a method that randomly generates passwords. I want it to be able to send each generated password to a specified phone number. What do I need to do? I read somewhere that it is possible using a GSM modem which I have. Any one tell me how to interface the servlet and the modem to send the sms
Here; this shows how to send SMS from modem using AT commands. You can use it in your servlet.