{"product_id":"buslinker-v3-serial-bus-servo-driver-board","title":"Hiwonder BusLinker V3.0 Serial Bus Servo Driver Board, USB-C to TTL, 5–14 V, for SO-ARM101 \/ LeRobot \/ Feetech STS Servos","description":"\u003cp\u003e\u003cstrong\u003eThe BusLinker V3.0 is a small USB-to-servo-bus interface board that powers and talks to half-duplex TTL bus servos (Hiwonder HX series, Feetech STS \/ SCS), letting a PC, Raspberry Pi or microcontroller set servo IDs, read positions and drive a whole chain of servos through a single serial port.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBusLinker V3.0 is the USB servo interface board that ships with the SO-ARM101 kits. Plug it into a laptop over USB-C, feed it 12 V, and it exposes the servo bus as a serial port that LeRobot, the Hiwonder PC tool or your own Python script can talk to. Useful as a spare, for a second arm, or for any project using Feetech-protocol bus servos.\u003c\/p\u003e\u003ch2\u003eWhat can you use it for?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpare or second controller for an SO-ARM101 leader or follower arm\u003c\/li\u003e\n\u003cli\u003eBench tool for setting IDs, zero offsets and angle limits on new servos before building an arm\u003c\/li\u003e\n\u003cli\u003eUSB servo interface for custom LeRobot robots, grippers, pan-tilt heads and hexapods\u003c\/li\u003e\n\u003cli\u003eBridging bus servos to an ESP32, STM32 or Arduino over the TTL header\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho is it for?\u003c\/h2\u003e\u003cp\u003eSO-ARM101 and LeRobot builders, students and makers using Feetech-protocol bus servos who need a reliable USB interface with proper power handling.\u003c\/p\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eServos: Hiwonder HX-10HM \/ HX-30HM \/ HX-65HM, Feetech STS3215, STS3250, SCS series and other 3-pin half-duplex TTL bus servos\u003c\/li\u003e\n\u003cli\u003eHosts: Windows, Ubuntu, macOS (USB serial), Raspberry Pi, Jetson; TTL header for Arduino, ESP32, STM32\u003c\/li\u003e\n\u003cli\u003eSoftware: Hiwonder servo PC tool, Hugging Face LeRobot, Feetech SDK, custom Python via pyserial\u003c\/li\u003e\n\u003cli\u003ePower: 5–14 V DC barrel jack or screw terminal; use 12 V 5 A for a six-servo arm, 7.4 V for 7.4 V servos\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eHiwonder BusLinker V3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003ctd\u003eUSB-to-serial bridge and power distribution for half-duplex TTL bus servos (Hiwonder HX \/ Feetech STS \/ SCS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHost interface\u003c\/th\u003e\n\u003ctd\u003eUSB-C (virtual COM port) or 4-pin TTL header (TX \/ RX \/ GND \/ 5 V) for MCU control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eServo ports\u003c\/th\u003e\n\u003ctd\u003e3 × 3-pin bus servo headers (parallel), daisy-chain more servos through the servos themselves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower input\u003c\/th\u003e\n\u003ctd\u003e5–14 V DC via 5.5 × 2.1 mm barrel jack or screw terminal; powers the servo bus directly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax current\u003c\/th\u003e\n\u003ctd\u003eDepends on supply; 12 V 5 A adapter recommended for a 6-servo arm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBaud rate\u003c\/th\u003e\n\u003ctd\u003eCustom, up to 1 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSoftware\u003c\/th\u003e\n\u003ctd\u003eHiwonder PC servo tool (ID, offset, limits, real-time graphs); works with LeRobot's Feetech motor bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize \/ weight\u003c\/th\u003e\n\u003ctd\u003e42 × 33 × 15 mm, 10 g; 36 × 28 mm mounting holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSample code\u003c\/th\u003e\n\u003ctd\u003ePython, Arduino, ESP32, STM32, Raspberry Pi, Jetson examples\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eDefault Title:\u003c\/strong\u003e 1 × BusLinker V3.0 board (no cables or power adapter)\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eIs this the board inside the SO-ARM101?\u003c\/h3\u003e\u003cp\u003eYes. Each SO-ARM101 arm has one BusLinker V3.0 in its base connecting the six servos to the PC. This listing is the bare board for spares, second arms or custom builds.\u003c\/p\u003e\u003ch3\u003eHow do I connect it?\u003c\/h3\u003e\u003cp\u003eUSB-C to the computer, 12 V into the barrel jack or screw terminal, and the servo chain into any of the three 3-pin ports. The board appears as a serial port; select it in LeRobot or the Hiwonder servo tool.\u003c\/p\u003e\u003ch3\u003eCan it power the servos?\u003c\/h3\u003e\u003cp\u003eYes. The DC input feeds the servo bus directly, so choose an adapter matched to your servos: 12 V for HX-30HM \/ STS3215-C018, 7.4 V for the 7.4 V models. USB alone does not power servos.\u003c\/p\u003e\u003ch3\u003eDoes it work with Feetech STS3215 servos and LeRobot?\u003c\/h3\u003e\u003cp\u003eYes. The protocol is the same Feetech half-duplex bus that LeRobot's motor driver uses; set the port in your robot config and it works like any other Feetech adapter.\u003c\/p\u003e\u003ch3\u003eCan I use it without a computer?\u003c\/h3\u003e\u003cp\u003eYes. The 4-pin TTL header (5 V, GND, TX, RX) lets an Arduino, ESP32 or STM32 drive the bus. Sample code for each platform is provided.\u003c\/p\u003e","brand":"Glunova Biotech","offers":[{"title":"Default Title","offer_id":50758000214255,"sku":"BUSLINKER-V3","price":22.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/5406\/2063\/files\/01_board.jpg?v=1789401560","url":"https:\/\/armdojo.com\/products\/buslinker-v3-serial-bus-servo-driver-board","provider":"ArmDojo","version":"1.0","type":"link"}