---
title: "Query the PED object for device information"
url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/process-a-basic-transaction-jni/query-the-ped-object-for-device-information-jni"
source_url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/process-a-basic-transaction-jni/query-the-ped-object-for-device-information-jni.md"
canonical: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/process-a-basic-transaction-jni/query-the-ped-object-for-device-information-jni"
last_modified: "2019-04-30T11:32:00+02:00"
language: "en"
---

# Query the PED object for device information

[View source](/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/process-a-basic-transaction-jni/query-the-ped-object-for-device-information-jni.md)

## Method

| Name              | Description                                                           |
| ----------------- | --------------------------------------------------------------------- |
| `refreshPedState` | Retrieves the state of the PED if connectivity with the PED was lost. |

## Parameters

| Name      | Description                                                 |
| --------- | ----------------------------------------------------------- |
| `retries` | Number of retries when attempting to refresh the PED state. |

## Callback

| Name                     | Description                                                                                                                |
| ------------------------ | -------------------------------------------------------------------------------------------------------------------------- |
| `pedStateChangeCallback` | `refreshPedState` triggers this callback.It returns if the PED state has changed, for example, if the PED has come online. |

## PED States

| State                                  | Description                                                                   |
| -------------------------------------- | ----------------------------------------------------------------------------- |
| `ped_state_undetected`                 | Incorrect IP, cannot detect the PED. This is a final state.                   |
| `ped_state_detected`                   | PED detected, correct serial/IP address.                                      |
| `ped_state_identified`                 | Valid PED.                                                                    |
| `ped_state_registered`                 | PED is registered, final result on RegisterPED.                               |
| `ped_state_config_synced`              | PED is has synchronized its configuration.                                    |
| `ped_state_wait_reboot_ready`          | PED is rebooting.                                                             |
| `ped_state_wait_ready_for_transaction` | PED must complete another process before it is ready to create a transaction. |
| `ped_state_not_ready`                  | PED is busy. This is a final state.                                           |
| `ped_state_ready_for_transaction`      | PED is ready for transaction.                                                 |
| `ped_state_tender`                     | PED is busy with a tender.                                                    |

## Result codes

| Name                                                        | Description                                                                                                             |
| ----------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------- |
| `ADYEN_LIBRARY_OK`                                          | Everything is ok, library will poll for updated terminal state.                                                         |
| `ADYEN_LIBRARY_CONFIRM_QUERY_PED_STATE_TERMINAL_ID_UNKNOWN` | Library is currently polling, call is rejected.                                                                         |
| `ADYEN_LIBRARY_CONFIRM_QUERY_PED_STATE_INVALID_ARGUMENTS`   | Invalid Arguments specified, use a positive number of `poll_retries`.                                                   |
| `ADYEN_LIBRARY_CONFIRM_QUERY_PED_STATE_INVALID_STATE`       | Library is already in polling state, you will receive an `ped_state` callback when the library receives an valid state. |
| `ADYEN_FAIL_MALLOC`                                         | Cannot allocate memory, system out of memory.                                                                           |
| `ADYEN_INVALID_REF_OBJ`                                     | Internal communication reference object is illegal.                                                                     |