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It works with U2D2 as mentioned above. However it could probably work with any UART. E.g. any USB to Serial/UART adapter which start at round 10EUR. Also most µCs already have this included. If you use Raspberry Pi, you could probably directly use the pins on the GPIO without buying any additional HW. Just connect GPIO14 and GPIO15 with a 2k resistor and connect GPIO15 as Dynamixel data line. Note that you need to activate the UART in SW/Operating System of raspberry Pi... I plan to try it but did not find time yet... There is a picture here: https://electronics.stackexchange.com/questions/183410/single-wire-two-way-serial-communication-hardware-configuration

It works with U2D2 as mentioned above. However it could probably work with any UART. UART instead of U2D2. E.g. any USB to Serial/UART adapter which start at round 10EUR. Also most µCs already have this included. If you use Raspberry Pi, you could probably directly use the pins on the GPIO without buying any additional HW. Just connect GPIO14 and GPIO15 with a 2k resistor and connect GPIO15 as Dynamixel data line. Note that you need to activate the UART in SW/Operating System of raspberry Pi... I plan to try it but did not find time yet... There is a picture here: https://electronics.stackexchange.com/questions/183410/single-wire-two-way-serial-communication-hardware-configuration

It works with U2D2 as mentioned above. However it could probably work with any UART instead of U2D2. E.g. any USB to Serial/UART adapter which start at round 10EUR. Also most µCs already have this included. If you use Raspberry Pi, you could probably directly use the pins on the GPIO without buying any additional HW. Just connect GPIO14 and GPIO15 with a 2k resistor and connect GPIO15 as Dynamixel data line. Note that you need to activate the UART in SW/Operating System of raspberry Pi... I plan to try it but did not find time yet... There is a picture here: https://electronics.stackexchange.com/questions/183410/single-wire-two-way-serial-communication-hardware-configuration

The Dynamixel SDK / Workbench directly control the Dynamixel via UART. This can be U2D2 or any other UART. Details can be found at Robotis documentation: http://emanual.robotis.com/docs/en/software/dynamixel/dynamixel_sdk/device_setup/