> 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/card-readers/mms-dyna-devices/dynaflex-ii-go/documentation/user-manuals/installation-and-operation-manual/user-interface/led-behavior-successful-transactions.md).

# LED Behavior: Successful Transactions

## **BCR Payment Transaction Successful (Connected via USB)**

When the operator presses the Start button on the host device, LED 1,2, and the BCR status light will be illuminated see the Figure below. When a barcode is detected, only LED 1 will remain illuminated, the BCR status LED will be off, and a long beep will sound see the next Figure.

<figure><img src="/files/PzKwsOpsDLj3pPqPuWwf" alt=""><figcaption></figcaption></figure>

<p align="center"><strong>Figure – BCR Transaction USB Ready State</strong></p>

<figure><img src="/files/xyTBSc03gehZALQX1Adq" alt=""><figcaption></figcaption></figure>

**Figure – BCR Transaction Barcode Detected (Connected via USB)**

## **MSR Payment Transaction Successful (Connected via USB)**

When the operator presses the Start transaction button on the host device, LED 1 and 2 will remain on. When a card is swiped, LEDs 1,2 and 4 will turn on in sequence (1,2 then 4), followed by a long beep, indicating a successful transaction, see the Figure below. After a successful transaction, the device will return to the ready state, see the next Figure.

<figure><img src="/files/UPNC1DwU3gzV97e2y1s7" alt=""><figcaption></figcaption></figure>

<p align="center"><strong>Figure – LED Sequence – Payment Transaction Successful MSR Swipe (Connected via USB)</strong></p>

<figure><img src="/files/rQRtEMGCF77UTTKqbUl3" alt=""><figcaption></figcaption></figure>

<p align="center"><strong>Figure – Return to Ready State After Successful Transaction</strong></p>

## **EMV Contact Payment Transaction Successful (Connected via USB)**

When the operator presses the Start transaction button on the host device, LED 1 and 2 will remain on. When a card is inserted, LEDs 1, 2 and 4 will turn on in sequence, followed by a long beep, indicating a successful transaction, see Figure 7-20 – LED Sequence – Payment Transaction Successful EMV Contact (Connected via USB). LED 4 will remain on, and the device will sound a double beep until the card is removed from the slot. After a successful transaction, the device will return to the ready state, see Figure 7-19.

<figure><img src="/files/udVYwThfoVhKAdTLBN1f" alt=""><figcaption></figcaption></figure>

<p align="center"><strong>Figure – LED Sequence – Payment Transaction Successful EMV Contact (Connected via USB)</strong></p>

## **EMV Contactless Payment Transaction Successful (Connected via USB)**

When the operator presses the Start transaction button on the host device, LED 1 will remain on. When a card is presented within range of the contactless reader, LEDs 1,2,3, and 4 will turn on in sequence, followed by a long beep, indicating a successful transaction, see Figure 7-21 - LED Sequence – Payment Transaction Successful EMV Contactless (Connected via USB). After a successful transaction, the device will return to the ready state, see Figure 7-19.

<figure><img src="/files/ZganyoLlnnrSfdJqyQ93" alt=""><figcaption></figcaption></figure>

<p align="center"><strong>Figure - LED Sequence – Payment Transaction Successful EMV Contactless (Connected via USB)</strong></p>

## **BCR Payment Transaction Successful (Connected via Bluetooth® LE)**

When the operator presses the           button on the host device, LED 1,2, and the BCR status light will be illuminated see Figure 7-22. When a barcode is detected, only LED 1 will remain illuminated, the BCR status LED will be off, and a long beep will sound see Figure 7-23.

<figure><img src="/files/Nnm7zcGDiKzSybIQLqwM" alt=""><figcaption></figcaption></figure>

<p align="center"><strong>Figure 7-22 – BCR Transaction Bluetooth® LE Ready State</strong></p>

<figure><img src="/files/gRokosyNipNP0hrcfkaw" alt=""><figcaption></figcaption></figure>

<p align="center"><strong>Figure – BCR Transaction Barcode Detected (Connected via Bluetooth® LE)</strong></p>

## **MSR Payment Transaction Successful (Connected via Bluetooth® LE)**

When the operator presses the           transaction button on the host device, LED 1 and 2 will remain on. When a card is swiped, LEDs 1,2 and 4 will turn on in sequence (1,2, then 4), followed by a long beep, indicating a successful transaction, see Figure 7-24. After a successful transaction, the device will return to the ready state, see Figure 7-25.

<figure><img src="/files/eoF9d3Z9ZmdHUYLoLpNv" alt=""><figcaption></figcaption></figure>

<p align="center"><strong>Figure – LED Sequence – Payment Transaction Successful MSR Swipe (Connected via Bluetooth® LE</strong>)</p>

<figure><img src="/files/QWbgjD9B0ffxKNtSwgrI" alt=""><figcaption></figcaption></figure>

<p align="center"><strong>Figure – Return to Ready State After Successful Transaction (Bluetooth® LE Ready State)</strong></p>

## **EMV Contact Payment Transaction Successful (Connected via Bluetooth® LE)**

When the operator presses the           transaction button on the host device, LED 1 and 2 will remain on. When a card is inserted, LEDs 1,2 and 4 will turn on in sequence, followed by a long beep, indicating a successful transaction, see Figure 7-26 - LED Sequence – Payment Transaction Successful EMV Contact (Connected via Bluetooth® LE). LED 4 will remain on and the device will sound a double beep until the card is removed from the slot. After a successful transaction, the device will return to the ready state, see Figure 7-25.

<figure><img src="/files/7LAjIW01HAm3ec35mJRs" alt=""><figcaption></figcaption></figure>

**Figure - LED Sequence – Payment Transaction Successful EMV Contact (Connected via Bluetooth® LE)**

## **EMV Contactless Payment Transaction Successful (Connected via Bluetooth® LE)**

When the operator presses the Start transaction button on the host device, LED 1 will remain on from ready state. When a card is presented within range of the contactless reader, LEDs 1,2,3, and 4 will turn on in sequence, followed by a long beep, indicating a successful transaction, see Figure 7-27. After a successful transaction, the device will return to the ready state, see Figure 7-25.

<figure><img src="/files/u3MvBJ5cKzAb6AEM5kHT" alt=""><figcaption></figcaption></figure>

<p align="center"><strong>Figure - LED Sequence – Payment Transaction Successful EMV Contactless (Connected via Bluetooth® LE)</strong></p>


---

# 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/card-readers/mms-dyna-devices/dynaflex-ii-go/documentation/user-manuals/installation-and-operation-manual/user-interface/led-behavior-successful-transactions.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.