> For the complete documentation index, see [llms.txt](https://developer.magtek.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.magtek.com/hardware/~/revisions/aurjDoOhAcnQLHeoR1ks/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/commands/generic-pass-through/pass-through-mode-start-stop.md).

# Pass-Through Mode Start/Stop

## Command 0x3001 – Pass-Through Mode Start/Stop

The host uses this command to enter or exit Pass-Through Mode. 

The Host must “Enter Pass-Through Mode” prior to using any other commands in this section. Otherwise, subsequent commands will be “ignored” / “rejected”. When finished, the Host should “Exit Pass-Through Mode”. Once exited, the reader returns to its “normal state” and will accept traditional commands.

## Table ‎- Request Data for Command 0x3001 – Pass-Through Mode Start/Stop

<table data-header-hidden><thead><tr><th></th><th width="52.66668701171875"></th><th></th><th width="54.6666259765625"></th><th width="54.66668701171875"></th><th width="80.66668701171875"></th></tr></thead><tbody><tr><td>Tag</td><td>Len</td><td>Value / Description</td><td>Typ</td><td>Req</td><td>Default</td></tr><tr><td>Beginning of any wrappers, at minimum including <strong>Request Message</strong> </td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>3001 = Command 0x3001 – Pass-Through Mode Start/Stop</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>81</td><td>01</td><td><p>This parameter defines how long the device to stay in the Pass-Through Mode</p><p>·       0x00 = No timeout</p><p>·       0x01 to 0xFF = 1 to 255 seconds</p></td><td> </td><td>R</td><td> </td></tr><tr><td>82</td><td>01</td><td><p>Pass-Through Mode</p><p>·       0x00 = Stop Pass-Through Mode.  This mode can only be used after the device in the Pass-Through Mode.  The device automatically turn off the RF Antenna after exit the Pass-Through Mode.  Device returns error if it is not in the Pass-Through Mode.</p><p>·       0x01 = Start Pass-Through Mode.  This mode can only be used when the device is in Idle state.</p></td><td>B</td><td>R</td><td> </td></tr><tr><td>End of any wrappers, at minimum including <strong>Request Message</strong> </td><td></td><td></td><td></td><td></td><td></td></tr></tbody></table>

## Table Response Data for Command 0x3001 – Pass-Through Mode Start/Stop <a href="#ref222754832" id="ref222754832"></a>

<table data-header-hidden><thead><tr><th width="389.81817626953125"></th><th width="53.54547119140625"></th><th width="115.272705078125"></th><th width="53.45452880859375"></th><th width="58"></th><th width="318.8182373046875"></th></tr></thead><tbody><tr><td>Tag</td><td>Len</td><td>Value / Description</td><td>Typ</td><td>Req</td><td>Default</td></tr><tr><td>Beginning of any wrappers, at minimum including Response Message</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>No parameters.</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>End of any wrappers, at minimum including Response Message</td><td></td><td></td><td></td><td></td><td></td></tr></tbody></table>

## Table Request Example

| Example (Hex)                                         |
| ----------------------------------------------------- |
| AA 00 81 04 01 9F 30 01 84 08 30 01 81 01 00 82 01 01 |

## Table - Response Example <a href="#ref222754832" id="ref222754832"></a>

| Example (Hex)                             |
| ----------------------------------------- |
| AA 00 81 04 82 9F 30 01 82 04 01 00 00 00 |


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://developer.magtek.com/hardware/~/revisions/aurjDoOhAcnQLHeoR1ks/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/commands/generic-pass-through/pass-through-mode-start-stop.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.