> ## Documentation Index > Fetch the complete documentation index at: https://devzone.nayax.com/llms.txt > Use this file to discover all available pages before exploring further. # Device Start Configuration > Configure a machine in Nayax Core to support Spark Device Start, for a single service station or for two to six service stations. The settings on this page prepare a machine for Spark Device Start, where a transaction starts from the terminal when a consumer interacts with it. Configure a single service station when the device serves one service point, or multiple service stations when it serves two to six. Apply these settings to the machine you selected in [Machine Configuration](/docs/integrate-pos-device/spark/machine-configuration). For other machine configurations not covered here, contact your Nayax Support representative. ## Single Service Station Use this configuration when the Nayax device serves one service point. ### Card Readers These settings control the device hardware and how a transaction can start: * **Decimal Place**: defines the Nayax device and affects the **Default Credit** value. This is usually `2`. * **Transaction Start Method**: set to **Button**, **Contactless**, and **Contact** so a transaction can start either from a card presented in idle mode or from a button press on the device screen. * **VPOS Button Function**: set to **5 - Btn Start/Card Start + External Cancel**. Card Readers settings for single station Device Start

Card Readers settings for single station Device Start

### MDB The **MDB Flags** setting tells the server which payment flow the device supports. Device Start uses the **Pre-Authorization** flow, which applies when the transaction starts before the consumer chooses a product or service and before the final amount is known. Set **MDB Flags** to **\* Flags Disabled**. MDB Flags set to Flags Disabled for the Pre-Authorization flow

MDB Flags set to Flags Disabled for the Pre-Authorization flow

### Payment The **Default Credit** setting sets the authorization amount for the Pre-Authorization flow. It applies when the `Amount` field in the `InfoQuery` response is empty. The value is in cents and is affected by the **Decimal Place** value. The settlement value cannot be higher than this amount. ### Pulse/ccTalk These settings define the credit applied per pulse and the authorization source: * **Credit per Pulse 1**: set to `1`. * **Number of Pulses per Vend 1**: set to `1`. * **Pulse Options**: set to **Use Default Credit for Authorization**. ### VPOS Touch The **VAS configurations** setting informs the server that the machine supports the Spark Device Start flow. Set it to **Spark Device Start (V2)**. Without this indication, Device Start does not function. This setting covers both Device Start and Device Stop. After you finish, click **Save** to store the configuration. ## Multiple Service Stations (2, 4, or 6) Use this configuration when the Nayax device serves two to six service points. The device supports an even number of service stations only (2, 4, or 6). ### Card Readers These settings control the device hardware and how a transaction can start: * **Decimal Place**: defines the Nayax device and affects the **Default Credit** value. When the device serves more than one service point, the decimal place also affects the amount shown for each service station. This is usually `2`. * **Transaction Start Method**: set to **Product**. With service station selection, the flow must start by selecting the desired service station first. Card Readers settings for multi station Device Start with Transaction Start Method set to Product

Card Readers settings for multi station Device Start with Transaction Start Method set to Product

### MDB The **MDB Flags** setting tells the server which payment flow the device supports. Multi-station Device Start uses the **Pre-Authorization** flow. Set **MDB Flags** to **\* Flags Disabled**. ### Payment The **Default Credit** setting sets the authorization amount for the Pre-Authorization flow. It applies when the `Amount` field in the `InfoQuery` response is empty. The value is in cents and is affected by the **Decimal Place** value. ### Pulse/ccTalk This section sets up the display for two to six service stations. Each pulse line represents one service station the device serves. The amount shown for each service station is the **Credit per Pulse** multiplied by the **Number of Pulses**. The authorization amount can be the same for every service station or set individually: * For an identical amount across all stations, set the amount in **Default Credit** and set **Pulse Options** to **Use Default Credit for Authorization**. * For different amounts per station, configure **Credit per Pulse** and **Number of Pulses** and do not use **Pulse Options**. Configure the following attributes. Separate each value with a semicolon, and match the position of each value to its service station: * **Credit per Pulse 1-6 (Cents)**: the amount to display for each service station, stations 1 to 6. This is multiplied by **Number of Pulses per Vend 1-6**. To hide the prices from the display, set this to `0`. * **Number of Pulses per Vend 1-6**: set each station to `1` (`1;1;1;1;1;1`). The amount displayed is **Credit per Pulse** multiplied by this number, so a value of `1` shows the **Credit per Pulse** amount unchanged. * **Pulse Identifier 1-6**: the identifier shown in idle mode for each service point. The default values are `1` to `6`. * **Pulse Title 1-6**: an optional description shown below each identifier. When set, the screen alternates between the price and the title every 3 seconds. If you do not set a title, the description screen is not shown. Examples: Charger, Air and Vac, Washer and Dryer. * **Pulse Options**: set to **Use Default Credit for Authorization** to base the authorization on the **Default Credit** amount and ignore the amounts shown per station. To use the displayed amounts instead, leave this attribute unset. * **Pulse Line Welcome Message**: an optional one-line message shown during idle mode, above the service stations layout. The default is "Choose Desired Machine". Use it to tell consumers how to start a flow. For example, with **Decimal Place** `2` and currency USD, setting **Credit per Pulse 1-6** to `200;200;200;300;300;400` and **Number of Pulses per Vend 1-6** to `1;1;1;1;1;1` displays six prices: three at \$2, two at \$3, and one at \$4. Setting **Pulse Options** to **Use Default Credit for Authorization** then authorizes each transaction against **Default Credit**. Idle mode display showing service stations with prices and a custom welcome message

Idle mode display showing service stations with prices and a custom welcome message