Fuel Dispenser PCB Modification for RS485

Angebotsbeschreibung

Max bid is 45 ### Project: Modify Existing Dispenser PCB for RS485 Communication We have an existing PCB for a specific fuel dispenser brand (XYZ), as shown in the attached image. It connects to the dispenser through four differential communication wires: RX+, RX−, TX+, and TX−, and currently converts the communication to USB. **The objective is to replace the USB interface with RS485 while retaining the existing PCB and dispenser-side circuitry as much as possible.** ### Scope of Work - Analyze the PCB and identify the USB controller and the communication signals between the USB controller and the existing four-wire interface circuit. - Determine the appropriate signal points where the USB communication interface can be bypassed or replaced. - Connect those signals to a sui...

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