I am doing a project for sending bulk sms service.this is the concept
create a website . Through this website the user will enter all their details so that only registered user can use my service.I ll get a service plan from any of the service providers for sending unlimited messages.They ll give me a SIM card with a unique number like 54545.My android application interfaces with the gsm modem and sends out the messages from my machine.
now,i wanted to know what kind of modem i can use for my project.Is there any modem to send only bulk sms
You might be looking for a GSM/GPRS-Terminal like these. I have used one to send SMS after a application has finished processing data or if an error occured.
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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 have a device which has a settings on it.
The device is uploading data to the cloud.
In the cloud I have settings of the device that I want to do a smart way to update the device settings, but still leave the device the master and stateless. I mean that every request shall come from the device towards the cloud and NACK/ACK will come back to the device.
Currently what we do is to put a command in the database to send to the device according to its serial number. when the device pings to the server, it gets the message with the update. But I do not want to wait for the ping of the BSS. How can I notify the device that a message is waiting for it ?
How do Apple does it with icloud settings to the devices ?
Thanks
Look at the MQTT protocol. This is being promoted by Amazon for IOT devices, and a broker (message router) is available from Amazon. The protocol uses a publish and subscriber model. The devices subscribe to their "topic" something like yourcompany/todevice/serialnumber, and when the server publishes to the same topic, the MQTT broker delivers the message. the messages normally use JSON protocol.
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).
Is there any way to initiate an SMS MO from a device from the network. Eg: Can I send a special USSD push to a device from the network so that it will SMS a specified text to a specified number from the device.
Only if you are the network operator and the USSD message is defined in the network and supported by the device.
You could also send a MT SMS and get the specified text as a reply (again supported on the device, obviously).
This largely depends on the device capabilities. The device needs logic for processing the USSD message, instead of just displaying it, and to trigger sending the MO SMS.
Since this is not a factory configuration, you would need a custom application to be installed on the device, provided that the device platform allows for the needed functionality. For example some J2ME-capable devices do have this functionality. Consult your device manufacturers development documentation.
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.