5/3/2023 0 Comments Mdb converter serial to usb![]() ![]() ![]() It's NOT for MDB sniffing, schematics will differ too, due MDB lines are optoisolated current loops. It's NOT for emulating coin charger or something like it (for these purposes you'll need another adapter). ![]() It's for connecting PC or other computer with "usual" 8-bit COM port ("Master", "VMC") to MDB devices (slaves such as coin charger, bill validator etc.), to control these devices and receive messages from them. It off-loads MDB bus polling and converting data between 9-bit MDB and 8-bit RS232 tasks from VMC, effectively delivers data by using hardware interrupts and provides conformity for required timing restrictions (see MDB datasheet for details).Ĭommand received from master PC (VMC) via serial port (RXD1 on AtMega1284), then sent to MDB serial port (TXD0) with 9-bit format.Ĭompiled_firmware folder contains ready-to-burn firmware images in hex format, for both "Through-hole ATmega1284" and "new rev2a" versions, see instructions inside.ĭocs folder contains manuals for operating device with firmware included. Русская версия описания находится ниже Arduino-MDB-UARTĪtmega1284 PLC (or Arduino Mega, or any other ATmega chip with 2 UARTs) acts as man-in-the-middle between MDB peripheral and master PC (VMC) serial port. ![]()
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