Error: Serial port or modem disconnected

[sluggo]

Spent a few too many days trying to get CA to see my USR 5637 model. I can call out using minicom so the modem does work. Apparently its on /dev/ttyACM0 so adding that to the app.cfg (thanks David White!) allows CA to at least skip looking for the modem yet still it thinks its offline. Using minicom to dial myself (again - it works) and the minicom terminal window says the modem is offline. The web interface also says the modem is offline. Sigh. Below are the results of adding MODEM_DEVICE = "/dev/ttyACM0” to the sample app.cfg with no other changes.

Does anyone have any ideas about this? Thanks!

$ callattendant -c app.cfg
Command line options:
--config=app.cfg
--data-path=None
--create-folder=False
Initializing Modem
Opening serial port
Looking for modem on /dev/ttyACM0
Modem initialized
MSG LED turned off
Starting the Flask webapp
MSG count: 0
Error: Serial port or modem disconnected
Approved LED blinking: 2 times
Modem thread exiting
Waiting for call...
Running the Waitress server

[thess]

Sorry to hear you are having so much trouble. If could please set DEBUG=True in app.cfg and post the output of the modem initialization here it would help diagnose this problem. Also, if you could add something about your configuration and version of CA that would be helpful too.

[sluggo]

Great thank you Ted! Not sure what version of CA but I just installed it using the info below so assuming its the latest version.

# Option 1: Using pip
$ source venv/bin/activate
$ pip3 install "callattendant@git+https://github.com/thess/callattendant”

My app.cfg is the sample one with debug = true and the modem_device set. Apologizing now for the text dump….

Here is app.cfg:

DEBUG = True
TESTING = False

MODEM_DEVICE = "/dev/ttyACM0"
OPTIONAL_MODEM_INIT = ""
HOST = "0.0.0.0"
PORT = 5000
PHONE_DISPLAY_SEPARATOR = "-"
PHONE_DISPLAY_FORMAT = "###-###-####"

SCREENING_MODE = ("whitelist", "blacklist")
BLOCK_ENABLED = True
NOTIFICATIONS_FOLDER = "notifications"
CALLERID_PATTERNS_FILE = 'cid_patterns.yaml'
PERMIT_NEXT_CALL_FLAG = 'permitnextcall.flag'
BLOCK_SERVICE = "NOMOROBO"
BLOCK_SERVICE_THRESHOLD = 2
BLOCKED_ACTIONS = ("answer", "greeting")
BLOCKED_GREETING_FILE = "blocked_greeting.wav"
BLOCKED_RINGS_BEFORE_ANSWER = 0
SCREENED_ACTIONS = ("answer", "greeting", "voice_mail")
SCREENED_GREETING_FILE = "screener_greeting.wav"
SCREENED_RINGS_BEFORE_ANSWER = 0
PERMITTED_ACTIONS = ("answer", "greeting", "record_message")
PERMITTED_GREETING_FILE = "general_greeting.wav"
PERMITTED_RINGS_BEFORE_ANSWER = 4
VOICE_MAIL_GOODBYE_FILE = "goodbye.wav"
VOICE_MAIL_INVALID_RESPONSE_FILE = "invalid_response.wav"
VOICE_MAIL_LEAVE_MESSAGE_FILE = "please_leave_message.wav"
VOICE_MAIL_CALLBACK_FILE = "thankyou_callback.wav"
VOICE_MAIL_RECORD_TIME = 120
EMAIL_ENABLE = False

EMAIL_SERVER = "SMTP server"
EMAIL_PORT = 465
EMAIL_SERVER_USERNAME = 'user name to log into the SMTP server'
EMAIL_SERVER_PASSWORD = 'password to log into the SMTP server’
EMAIL_FROM = 'e-mail address to appear in the "From:" header'
EMAIL_TO = 'e-mail address(es) to send the voicemail notification to, one string, comma-separated'
EMAIL_WAVE_ATTACHMENT = False

STATUS_INDICATORS = "NULL"

MQTT_BROKER = "MQTT server"
MQTT_TOPIC_PREFIX = "callattendant"

MQTT_INDICATOR_TYPE = "STATE"
MQTT_TIME_FORMAT = "UNIX"
MQTT_CALLERID_FORMAT = "RAW"

GPIO_LED_RING_PIN = 14
GPIO_LED_RING_BRIGHTNESS = 100

GPIO_LED_APPROVED_PIN = 15
GPIO_LED_APPROVED_BRIGHTNESS = 100

GPIO_LED_BLOCKED_PIN = 17
GPIO_LED_BLOCKED_BRIGHTNESS = 100

GPIO_LED_MESSAGE_PIN = 4
GPIO_LED_MESSAGE_BRIGHTNESS = 100

GPIO_LED_MESSAGE_COUNT_PINS = (8, 7, 27, 23, 10, 11, 9, 18)

GPIO_LED_MESSAGE_COUNT_KWARGS = {"active_high": True}

===============

Ok here is the output from the modem init:

Command line options:
--config=app.cfg
--data-path=None
--create-folder=False
[Configuration]
BLOCKED_ACTIONS = ('answer', 'greeting')
BLOCKED_GREETING_FILE = /home/tomsawyer/.callattendant/notifications/blocked_greeting.wav
BLOCKED_RINGS_BEFORE_ANSWER = 0
BLOCK_ENABLED = True
BLOCK_SERVICE = NOMOROBO
BLOCK_SERVICE_THRESHOLD = 2
CALLERID_PATTERNS_FILE = /home/tomsawyer/.callattendant/cid_patterns.yaml
CONFIG_FILE = app.cfg
DATABASE = callattendant.db
DATA_PATH = /home/tomsawyer/.callattendant
DB_FILE = /home/tomsawyer/.callattendant/callattendant.db
DEBUG = True
EMAIL_ENABLE = False
EMAIL_FROM = e-mail address to appear in the "From:" header
EMAIL_PORT = 465
EMAIL_SERVER = SMTP server
EMAIL_SERVER_PASSWORD = ********
EMAIL_SERVER_USERNAME = user name to log into the SMTP server
EMAIL_TO = e-mail address(es) to send the voicemail notification to, one string, comma-separated
EMAIL_WAVE_ATTACHMENT = False
GPIO_LED_APPROVED_BRIGHTNESS = 100
GPIO_LED_APPROVED_PIN = 15
GPIO_LED_BLOCKED_BRIGHTNESS = 100
GPIO_LED_BLOCKED_PIN = 17
GPIO_LED_MESSAGE_BRIGHTNESS = 100
GPIO_LED_MESSAGE_COUNT_KWARGS = {'active_high': True}
GPIO_LED_MESSAGE_COUNT_PINS = (8, 7, 27, 23, 10, 11, 9, 18)
GPIO_LED_MESSAGE_PIN = 4
GPIO_LED_RING_BRIGHTNESS = 100
GPIO_LED_RING_PIN = 14
HOST = 0.0.0.0
MODEM_DEVICE = /dev/ttyACM0
MQTT_BROKER = MQTT server
MQTT_CALLERID_FORMAT = RAW
MQTT_INDICATOR_TYPE = STATE
MQTT_PASSWORD = ********
MQTT_PORT = 1883
MQTT_TIME_FORMAT = UNIX
MQTT_TOPIC_PREFIX = callattendant
MQTT_USERNAME = None
NOTIFICATIONS_FOLDER = /home/tomsawyer/.callattendant/notifications
OPTIONAL_MODEM_INIT =
PERMITTED_ACTIONS = ('answer', 'greeting', 'record_message')
PERMITTED_GREETING_FILE = /home/tomsawyer/.callattendant/notifications/general_greeting.wav
PERMITTED_RINGS_BEFORE_ANSWER = 4
PERMIT_NEXT_CALL_FLAG = /home/tomsawyer/.callattendant/permitnextcall.flag
PHONE_DISPLAY_FORMAT = ###-###-####
PHONE_DISPLAY_SEPARATOR = -
PORT = 5000
ROOT_PATH = /home/tomsawyer/venv/lib/python3.11/site-packages/callattendant
SCREENED_ACTIONS = ('answer', 'greeting', 'voice_mail')
SCREENED_GREETING_FILE = /home/tomsawyer/.callattendant/notifications/screener_greeting.wav
SCREENED_RINGS_BEFORE_ANSWER = 0
SCREENING_MODE = ('whitelist', 'blacklist')
STATUS_INDICATORS = NULL
TESTING = False
VERSION = 2.1.0
VOICE_MAIL_CALLBACK_FILE = /home/tomsawyer/.callattendant/notifications/thankyou_callback.wav
VOICE_MAIL_GOODBYE_FILE = /home/tomsawyer/.callattendant/notifications/goodbye.wav
VOICE_MAIL_INVALID_RESPONSE_FILE = /home/tomsawyer/.callattendant/notifications/invalid_response.wav
VOICE_MAIL_LEAVE_MESSAGE_FILE = /home/tomsawyer/.callattendant/notifications/please_leave_message.wav
VOICE_MAIL_MESSAGE_FOLDER = /home/tomsawyer/.callattendant/messages
VOICE_MAIL_RECORD_TIME = 120
Initializing Modem
Opening serial port
Looking for modem on /dev/ttyACM0
_send_and_read('AT','OK',5)
'0\r'
>>> _read_response('OK',5) timed out
Failed to detect a compatible modem on /dev/ttyACM0
Modem initialized
Initializing CallLogger
CallLogger initialized
Initializing CallScreener
Initializing Blacklist
Blacklist initialized
Initializing Whitelist
Whitelist initialized
NomoroboService Initialized as CallScreener
CallScreener initialized
Initializing VoiceMail
Unplayed message count is 0
Message initialized
Initializing Whitelist
Whitelist initialized
Message Event triggered
Resetting Message Indicator to show 0 unplayed messages
MSG LED turned off
MSG count: 0
VoiceMail initialized
Starting the Flask webapp
Message Event triggered
Resetting Message Indicator to show 0 unplayed messages
MSG LED turned off
MSG count: 0
Running the Waitress server
Error: Serial port or modem disconnected
Modem thread exiting
Approved LED blinking: 2 times
Waiting for call...

==========================

Thanks again for your help!

• jeff

[thess]

The following from the log:

Looking for modem on /dev/ttyACM0
_send_and_read('AT','OK',5)
'0\r'
>>>_read_response('OK',5) timed out
Failed to detect a compatible modem on /dev/ttyACM0

Shows the problem. It appears your modem DCE Response Format is set for numeric result codes. It returned '0' instead of 'OK' when probed. CA could handle this situation with some code changes but for now, you can send ATV1 (usually the default) directly to your modem using a terminal emulator (minicom in your case) and then re-run CA.

[sluggo]

That was it! I really appreciate the help that was just mad. The modem was bought used off of Amazon so maybe that’s why it was set up like that.

Thanks again,
jeff