Use cases Integrations Compare Blog Get started

Integrations

Send SMS from Node-RED with SimGate

Connect SimGate to Node-RED using a standard HTTP request node. Send texts from any flow — IoT events, sensor thresholds, schedules — from your own SIM.

Standard HTTP node

Works self-hosted

Your own SIM

No cloud dependency

Start free Browse integrations

SMS from Node-RED flows

Node-RED's HTTP request node can call any REST API, so adding SimGate SMS to a flow is a matter of minutes — no custom node to install, no cloud dependency to manage.

This fits naturally with the Node-RED audience: self-hosters, home automation builders, and IoT engineers who already run their own stack and want SMS alerts from a device they control rather than a third-party SIM they rent.

Wire SimGate into Node-RED

Add a trigger node

Start with any input: inject, MQTT, sensor, webhook, or a Home Assistant event node.

Add a function node (optional)

Use a Function node to build the message text from your trigger payload — e.g. format a sensor value or event name.

Add an HTTP request node

Set Method to POST, URL to https://api.simgate.app/v1/sms/send. Under Headers add x-api-key with your SimGate key and Content-Type: application/json.

Set the body

In the function node upstream, set msg.payload to {"deviceId": "...", "phoneNumber": "+1234567890", "message": "..."}. The HTTP request node sends msg.payload as the request body.

Function node payload

javascript

1
// Function node — runs before the HTTP request node
2
msg.payload = {
3
  deviceId: "android-5q15b182f2704gbz",
4
  phoneNumber: "+1234567890",
5
  message: "Alert: " + msg.payload.sensorName +
6
           " reading " + msg.payload.value + msg.payload.unit,
7
};
8
msg.headers = {
9
  "x-api-key": "<your-simgate-api-key>",
10
  "Content-Type": "application/json",
11
};
12
return msg;

Build the payload in a Function node, then pass msg to the HTTP request node.

Common Node-RED + SimGate flows

Temperature or humidity sensor threshold alerts
Motion detector or door/window sensor notifications
Home Assistant automation SMS when someone arrives or leaves
Server or container health alerts from a local Docker stack
Daily status digest triggered by an inject node on a schedule

Frequently asked questions

Do I need to install a Node-RED SimGate node?

No — the built-in HTTP request node is all you need. SimGate is a standard REST API.

Does this work on a Raspberry Pi?

Yes. Node-RED running on a Raspberry Pi can call the SimGate API over your local network or the internet. Just make sure the Pi has outbound HTTPS access.

Can I receive inbound SMS into Node-RED?

Yes — expose a Node-RED HTTP input node to the internet (or use a tunnel like ngrok), set that URL as your SimGate inbound webhook, and reply SMS events will flow directly into your Node-RED flow.

Where should I store the SimGate API key?

Store it as a Node-RED environment variable and reference it with env.get('SIMGATE_API_KEY') in your Function node, rather than hardcoding it in the flow JSON.

Turn your phone into an SMS API

Send and receive SMS from your own SIM at a flat monthly price. Install the app, connect a device, and call the API in minutes.

Start free