Gilbarco Dispenser Twowire Protocol For Third Party Pump Controllers New Jun 2026

Gilbarco proprietary systems send a "Resettle" command every 60 seconds to clear hanging transactions. Third-party controllers often forget this.

Developing a new controller to reliably parse Gilbarco Two-Wire streams requires handling several real-world field anomalies.

Despite the exotic physical layer, the underlying data transmission relies on standard Universal Asynchronous Receiver-Transmitter (UART) framing:

Gilbarco Veeder-Root continues to innovate. The introduction of the enables remote dispenser management. This next-generation pump control node allows retailers to perform remote software updates and changes through cloud-based platforms. The Hub cloud-based solution provides real-time connectivity and open APIs, empowering device control and optimization with a simple, consistent customer experience for streamlined c-store management. The trend toward connectivity is also seen in the integration of modern payment technologies, such as FlexPay Connect , which leverages existing two-wire infrastructure to set up high-speed connections for chip card capabilities on the forecourt, avoiding costly new conduit installation. Gilbarco proprietary systems send a "Resettle" command every

A third-party controller from a company like or OPW Fuel Management can directly talk to Gilbarco dispensers via the two-wire protocol. The controller validates a fleet card, issues a preset for 100 gallons over two-wire, and reads the final volume—no Gilbarco POS required.

When a third-party controller detects an "Authorize Request", it evaluates the authorization source (e.g., an indoor POS, an outdoor payment terminal, or a mobile app fleet authorization). If approved, the controller sends an Authorization frame containing:

: The standard "Corporate" baud rate for newer models like Highline-111 and Euroline. Despite the exotic physical layer, the underlying data

) to ensure data integrity against electromagnetic disturbances. Implementation for Third-Party Controllers

Gilbarco Two-Wire Protocol is a proprietary communication standard used to connect Gilbarco fuel dispensers to Point of Sale (POS) systems and site controllers. For third-party developers, implementing this protocol is essential for controlling fueling transactions, managing presets, and retrieving real-time data from forecourt equipment. Technical Overview The protocol operates as a multi-drop current loop

: Every connected device on the shared loop reads all transmitted data packets simultaneously. The controller validates a fleet card

The Gilbarco two-wire protocol is a (0–50 mA typical) used on Gilbarco dispensers (e.g., Encore 500, 700, Eclipse, and earlier Highline models). It allows a remote controller to:

The nozzle was returned to the boot. The final volume and currency totals are locked in memory waiting for a clearing signal. B. The Authorization Command

I can provide the specific code snippets or wiring diagrams you need to get your controller communicating. Share public link

Use shielded twisted-pair cables to prevent electromagnetic interference.

Some newer Gilbarco dispensers (e.g., Encore 700S with FlexPay) may the two-wire port by default unless specifically enabled in the dispenser configuration menu. Solution: Obtain Gilbarco’s “Two-Wire Interface Enable” procedure (requires service password).