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Home Assistant GSM Call

Home Assistant integration which allows you to call a phone number using 3G/4G, LTE modems.

The integration is primarily designed for emergency notification of important events in your smart home.

Installation

This integration can be installed using HACS. To add GSM Call to your Home Assistant, click the blue button above or add the repository manually:

1. Go to HACS → Integrations.
2. In the top right corner, select the three-dots menu and choose Custom repositories.
3. Paste black-roland/homeassistant-gsm-call.
4. Select Integration in the Category field.
5. Click the Save icon.
6. Install “GSM Call”.

Configuration and usage

To use this integration, add the following to your configuration.yaml:

notify:
  - name: call
    platform: gsm_call
    device: /dev/serial/by-id/usb-HUAWEI_Technology_HUAWEI_Mobile-if01-port0 # modem device path

Make sure to restart Home Assistant after updating configuration.yaml. Use the notify.call action to make a phone call. The phone number to dial is specified as target:

action:
  service: notify.call
  data:
    target: "+12345678901"
    message: "Required by HASS but not used by the integration — enter any text here"

Dialing duration

By default, the integration tries to make a phone call for 30 seconds. Duration can be changed by specifying call_duration_sec:

notify:
  - name: call
    platform: gsm_call
    device: /dev/serial/by-id/usb-HUAWEI_Technology_HUAWEI_Mobile-if01-port0
    call_duration_sec: 40

Please take into account that your service provider might interrupt dialing before reaching the desired time if the duration is too high.

The duration is counted from the moment the called phone starts ringing.

Events

The integration fires the gsm_call_ended event indicating whether the call was declined or answered. For example, you can turn off the alarm if the callee declined a call:

automation:
  - alias: "Disarm the security alarm when a call is declined"
    triggers:
      - trigger: event
        event_type: gsm_call_ended
        event_data:
          reason: "declined"
    actions:
      - action: alarm_control_panel.alarm_disarm
        target:
          entity_id: alarm_control_panel.security

reason can contain the following values: not_answered, declined, answered.

In addition to the reason, you can filter by the phone_number. All possible data properties can be found in developer tools.

SMS support and other features

This integration is intended for making voice calls. Let's keep it simple. There are no plans to add SMS or other functionality not directly related to voice calls. For SMS support, please check out this integration.

Using together with the SMS integration

GSM modems usually provide multiple interfaces:

$ ls -1 /dev/serial/by-id/usb-HUAWEI_Technology_HUAWEI_Mobile-if0*
/dev/serial/by-id/usb-HUAWEI_Technology_HUAWEI_Mobile-if00-port0
/dev/serial/by-id/usb-HUAWEI_Technology_HUAWEI_Mobile-if01-port0
/dev/serial/by-id/usb-HUAWEI_Technology_HUAWEI_Mobile-if02-port0

To use this together with the sms integration, configure different interfaces for each integration. Otherwise, integrations may mutually block each other.

Troubleshooting

For troubleshooting, please enable debug logs in configuration.yaml first:

logger:
  logs:
    custom_components.gsm_call: debug

ModemManager

Please make sure ModemManager is disabled.

ZTE modems

On some ZTE modems, dialing only works after sending an obscure command: AT%icscall=1,0. Try specifying hardware: zte in the configuration if dialing doesn't work with the default configuration:

notify:
  - name: call
    platform: gsm_call
    device: /dev/serial/by-id/usb-ZTE_MF192_D536C4624C61DC91XXXXXXXXXXXXXXXXXXXXXXXX-if00
    hardware: zte

ATD/ATDT

Some modems may require a different AT command to dial. If the default configuration doesn't work, try specifying hardware: atdt:

notify:
  - name: call
    platform: gsm_call
    device: /dev/serial/by-id/usb-HUAWEI_Technology_HUAWEI_Mobile-if01-port0
    hardware: atdt

Supported hardware

In general, this integration should be compatible with modems specified here.

Tested on:

• Huawei E161/E169/E620/E800.
• Huawei E171.
• Huawei E3531 (needs to be unlocked using this guide).
• ZTE MF192 (hardware: zte must be specified in the configuration). Cannot be used simultaneously with the SMS integration.