---
title: "system.secsgem.sendRequest"
description: "Sends a JSON-formatted SECS message to a tool."
---

# system.secsgem.sendRequest

> Sends a JSON-formatted SECS message to a tool.

This function is used in **Python Scripting**.

## Description
Sends a JSON-formatted SECS message to a tool. An equipment connection must be configured for the tool in the Gateway.

## Client Permission Restrictions
This scripting function has no [Client Permission](projects\project-properties\project-properties.md#client---permissions) restrictions.

## Syntax
`system.secsgem.sendRequest(streamFunction, reply, body, equipment)`

### Parameters
Type | Parameter | Description 
------- | ------- | ------
String| `streamFunction` | The stream and function of the SECS message to send. Example: "S1F13"
Boolean| `reply` | Whether or not the SECS message expects a reply message.
Object| `body` | This contains the body of a SECS message. The argument can be a Python Object or JSON string representing the body of a SECS message. If this argument is a string then it will be converted to a Python Object using the system.util.jsonDecode function.
String| `equipment` | Name of the equipment connection to use.

### Returns
**Integer** - The transactionID of the SECS message response.
### Scope
Gateway, Designer, Client

## Code Examples

```python title="Code Snippet - Sending a S1F1 Message"
# Replace the string below with the equipment name you want to send the request to.
myEquipment = "EquipmentOne"
 
# Define the contents of the body. We're using an empty string, since S1F1 doesn't expect a body, and we need to define something (Python's None will result in an exception).
body = ""
 
# Store the returned transactionID in a variable. This script could be extended by using system.secsgem.getResponse to view the response.
transactionID = system.secsgem.sendRequest("S1F1", True, body, myEquipment)
```

```python title="Code Snippet"
[ 
   { 
      "format":"U4",
      "value":268959744
   },
   { 
      "format":"U4",
      "value":272695296
   },
   { 
      "format":"U4",
      "value":268500992
   }
]
```