Asterisk automated phone call with tts and DTMF

[stamate_viorel]

So first we need a bash script that is readable by openhab

#!/bin/bash

AMI_HOST="192.168.1.1"
AMI_PORT="5038"
AMI_USERNAME="openhab"
AMI_SECRET="PASSWORD1234"
PHONE_NUMBER="911"
ALARM_TEXT=$1

(
echo "Action: Login"
echo "Username: $AMI_USERNAME"
echo "Secret: $AMI_SECRET"
echo "Events: off"
echo
echo "Action: Originate"
echo "Channel: Local/s@external-notify"
echo "Exten: s"
echo "Priority: 1"
echo "Context: external-notify"
echo "Variable: TO_SAY=$ALARM_TEXT"
echo "Variable: PHONE_NUMBER=$PHONE_NUMBER"
echo "Async: yes"
echo
echo "Action: Logoff"
echo
) | nc $AMI_HOST $AMI_PORT -q 20

then we also need some rule to trigger that

var boolean dtmfDetectionEnabled = false

rule "Call pbx test external"
when
    Item lightitem_test changed to ON
then
    dtmfDetectionEnabled = true // Enable DTMF detection
    executeCommandLine("/etc/openhab/misc/sip_external_nr.sh", "Hello!!!. OpenHAB has detected side lamp to be on. Do you want to turn it off or leave it on??. Press 1 to leave it on or press 0 to turn it off after the tone!!!.")
    logWarn("Script result", "Calling external number first attempt")

    createTimer(now.plusSeconds(30), [ |
        val hangupStatus = status_string_voip.state.toString
        if (hangupStatus == "Hang-up") {
            executeCommandLine("/etc/openhab/misc/sip_external_nr.sh", "Hello!!!. Second call attempt. OpenHAB has detected side lamp to be on. Do you want to turn it off or leave it on??. Press 1 to leave it on or press 0 to turn it off after the tone!!!.")
            logWarn("Second call result", "Calling external number second attempt")
        }
    ])
end

rule "Handle DTMF Input pbx test external"
when
    Item dtmf_string_voip received update
then
    if (dtmfDetectionEnabled == true && dtmf_string_voip.state instanceof StringType) {
        val dtmfInput = dtmf_string_voip.state.toString
        switch (dtmfInput) {
            case "1": {
                // The user chose to leave the light on
                dtmfDetectionEnabled = false
                logInfo("DTMF input", "User chose to leave the light on.")
            }
            case "0": {
                // The user chose to turn the light off
                lightitem_test .sendCommand(OFF)
                dtmfDetectionEnabled = false
                logInfo("DTMF input", "User chose to turn the light off.")
            }
            case "*": {
                // The user hung up
                logInfo("DTMF input", "User hung up.")
                dtmfDetectionEnabled = false // Disable DTMF detection
            }
        }
    }
end

then we also need to string items

String status_string_voip
String dtmf_string_voip

and finally a dial plan

[external-notify] ; this is a test script to prove sip notification for
exten => s,1,Verbose(2,Openhab automated call external)
same => n,Set(status_string=Calling in progress)
same => n,System(curl -X POST --header "Content-Type: text/plain" --header "Accept: application/json" -d "${status_string}" -H "Authorization: Bearer oh.asterisk.blablabla" "http://192.168.1.1:8080/rest/items/status_string_voip")
same => n,Dial(SIP/trunkname/${PHONE_NUMBER},30,tR)
same => n,Set(DIALSTATUS=${DIALSTATUS})
same => n,Set(call_duration=${ANSWEREDTIME})
same => n,GotoIf($["${DIALSTATUS}"="NOANSWER"]?noanswer:amd)

same => n(amd),AMD()
same => n,NoOp(AMD status: ${AMDSTATUS})
same => n,System(curl -X POST --header "Content-Type: text/plain" --header "Accept: application/json" -d "${AMDSTATUS}" -H "Authorization: Bearer oh.asterisk.blablabla" "http://192.168.1.1:8080/rest/items/status_string_voip")
same => n,GotoIf($[${AMDSTATUS}=HUMAN]?humn:vmachn)

same => n(vmachn),Set(status_string=Voicemail detected)
same => n,System(curl -X POST --header "Content-Type: text/plain" --header "Accept: application/json" -d "${status_string}" -H "Authorization: Bearer oh.asterisk.blablabla" "http://192.168.1.1:8080/rest/items/status_string_voip")
same => n,Hangup()

same => n(humn),Set(status_string=Call connected)
same => n,System(curl -X POST --header "Content-Type: text/plain" --header "Accept: application/json" -d "${status_string}" -H "Authorization: Bearer oh.asterisk.blablabla" "http://192.168.1.1:8080/rest/items/status_string_voip")
same => n,Answer()
same => n,Set(TEXT=${TO_SAY})
same => n,System(echo ${TEXT} | text2wave -o /tmp/festival.wav -eval "(voice_cmu_us_slt_arctic_hts)")
same => n,System(sox /tmp/festival.wav -r 8000 /tmp/festival_resampled.wav)
same => n(startLoop),Wait(2)
same => n,Playback(/tmp/festival_resampled)
same => n,Read(DTMF,beep,1)
same => n,GotoIf($["${DTMF}"=""]?startLoop:hang)

same => n(noanswer),Set(status_string=Call not answered)
same => n,System(curl -X POST --header "Content-Type: text/plain" --header "Accept: application/json" -d "${status_string}" -H "Authorization: Bearer oh.asterisk.blablabla" "http://192.168.1.1:8080/rest/items/status_string_voip")
same => n,Hangup()

same => n(hang),NoOp(DTMF String: ${DTMF})
same => n,Set(dtmf_string=${DTMF})
same => n,System(rm -f /tmp/festival.wav /tmp/festival_resampled.wav)
same => n,System(curl -X POST --header "Content-Type: text/plain" --header "Accept: application/json" -d "${dtmf_string}" -H "Authorization: Bearer oh.asterisk.blablabla" "http://192.168.1.1:8080/rest/items/dtmf_string_voip")
same => n,Set(status_string=*)
same => n,System(curl -X POST --header "Content-Type: text/plain" --header "Accept: application/json" -d "${status_string}" -H "Authorization: Bearer oh.asterisk.blablabla" "http://192.168.1.1:8080/rest/items/status_string_voip")
same => n,Hangup()

exten => h,1,Set(status_string=Hang-up)
same => n,System(curl -X POST --header "Content-Type: text/plain" --header "Accept: application/json" -d "${status_string}" -H "Authorization: Bearer oh.asterisk.blablabla" "http://192.168.1.1:8080/rest/items/status_string_voip")
same => n,System(curl -X POST --header "Content-Type: text/plain" --header "Accept: application/json" -d "*" -H "Authorization: Bearer oh.asterisk.blablabla" "http://192.168.1.1:8080/rest/items/dtmf_string_voip")
same => n,Hangup()

Make sure you have festival installed with the specific voice package and also amd() loaded into asterisk with a conf like this

;
; Answering Machine Detection Configuration

[general]
initial_silence = 5000
greeting = 1500
after_greeting_silence = 1000
total_analysis_time = 5000
min_word_length = 120
between_words_silence = 50
maximum_number_of_words = 3
silence_threshold = 384
maximum_word_length = 4000

Also this part of dial plan oh.asterisk.blablabla is you api key that you can generate from openhab help and about section when you log in