Inbound SMS text to mobile Alert for IoT and remote Devices



Distributed sensors or devices in the field often have no network connection and can only send SMS text messages in case a problem is detected. When an issue has been detected SIGNL4 takes care to alert the responsible user or team as quickly and as reliably as possible including acknowledgement, escalation, duty scheduling / shift planning, collaboration and more.

The integration of Melrose Labs and SIGNL4 enables you to connect your SMS-capable devices with SIGNL4 for reliable team alerting.

 How it Works

When your devices detect critical situations or malfunctions they send an SMS message to Melrose Labs’ SMS gateway. The gateways then forwards the message to SIGNL4 via webhook where the alert is triggered.

 Integration Capabilities

  • Production or field staff is alerted via mobile push, text and call
  • Staff can acknowledge and take ownership for critical events that occur
  • Alerts are escalated in case of no response
  • Communicate with team members to address a particular problem (in-alert chat)
  • Inbound webhook establishes connection from Melrose Labs to SIGNL4
  • On-call scheduling to alert the right people at the right time


  • Industrial IoT
  • Industry 4.0
  • IoT Service Alerting
  • IoT Device Management
  • IT, Manufacturing, Utility, Oil and Gas, Agriculture, etc.

Sensors or other devices send SMS text messages when problems are detected

Melrose Labs SMS gateways receives the SMS messages and forwards them to SIGNL4

Persistent Notifications by push, text and voice call with Tracking, Escalation and Confirmation to Staff on Duty

In order to integrate your SMS-capable devices with SIGNL4 you need to get a virtual phone number from Melrose Labs. There you can configure the forwarding of your devices’ SMS messages to a SIGNL4 team.



In order to configure the SMS-to-SIGNL4 forwarding you need the following information:

  • The phone numbers of all your devices that send SMS messages
  • Your SIGNL4 team secret(s) for the team(s) that should receive the alerts

Contact Melrose Labs

Please contact Melrose Labs directly to open your account and to configure the SMS-to-SIGNL4 forwarding. You can find the contact information here.

Besides SMS-to-SIGNL4 Melrose Labs offers other services for example outbound mobile terminated (MT) SMS from an application to a mobile that is also passed to SIGNL4.

SIGNL4 can further increase the visibility of alerts through its Signals and Services section. Augmenting the color and icon of alerts will provide more relevant information at a glance without having to open the alert.


Change alert color and override title + text 

Override text, colors and titles are triggered by keywords set within the mobile app.

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