Write some Software

I need an Android App (Android 4.4.2) that will send SMSs, wait for a specific reply and send the next SMS. I want the app to be able to change the text of the SMS every time it sends an SMS. The app is for a "brute force attack to find a password". for an automated GATE system. I have Android Studio so a zipped project compatible with this IDE is preferred as the delivery. Example: app send: "0000_INFO"(sent SMS to specific phone number) gate respond: "Wrong password"(app writes "0000_wrong" to the log (new line in the log)) (received SMS from a specific phone number) app send:"0001_INFO"(sent SMS to specific phone number) gate respond: "Wrong password"(app writes "0001_wrong" to the log (new line in the log)) ..... app send:"9899_INFO"(sent SMS to specific phone number) if gate does not respond in a specified amount of time(say 10000ms) app writes "TIMEOUT" to the log if gate respond something else than "Wrong password" apps writes the message to the log and stops. I want the app to be able to resume from the last code tried incrementing with 1 every time. I want to be able to edit this last code tried. I want to be able to view the entire log file (perhaps copy it from the phone to a PC via USB) I want to be able to edit the number where the SMSs are to be sent. I want to be able to change the rest of the message (what follows after the password, ex: "_INFO" to another text of my choosing ) Thank you.