{"product_id":"waveshare-bus-servo-adapter-board","title":"Waveshare Bus Servo Adapter (A), USB-C \/ UART Driver Board for Feetech ST \/ SC Bus Servos, 9–12.6 V, up to 253 Servos","description":"\u003cp\u003e\u003cstrong\u003eThe Waveshare Bus Servo Adapter (A) is a small USB-C and UART interface board that powers and controls Feetech ST\/SC-series bus servos (STS3215, STS3250) from a PC, Raspberry Pi or microcontroller, and is the board most LeRobot SO-101 and LeKiwi builds use in place of the Hiwonder BusLinker.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Waveshare Bus Servo Adapter (A) is the low-cost USB interface most LeRobot builders use to drive Feetech STS3215 servos from a laptop or Raspberry Pi. Plug in 12 V, connect the servo chain, and the board appears as a serial port for LeRobot, the Waveshare servo tool or your own Python code. A direct alternative to the Hiwonder BusLinker for SO-ARM101 and LeKiwi builds.\u003c\/p\u003e\u003ch2\u003eWhat can you use it for?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eController for a self-built SO-ARM100 \/ SO-ARM101 leader or follower arm\u003c\/li\u003e\n\u003cli\u003eSetting servo IDs and offsets before assembly\u003c\/li\u003e\n\u003cli\u003eLeKiwi mobile base and OpenDuck Mini servo bus\u003c\/li\u003e\n\u003cli\u003eAny Feetech-servo robot driven from Python, ESP32 or Arduino\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho is it for?\u003c\/h2\u003e\u003cp\u003eBuilders assembling SO-101 arms from servos and printed parts, and anyone who needs a spare or second USB servo interface.\u003c\/p\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eServos: Feetech STS3215, STS3250, STS3235, SCS series\u003c\/li\u003e\n\u003cli\u003eHosts: Windows, macOS, Linux, Raspberry Pi (USB serial); ESP32 \/ Arduino \/ STM32 via UART\u003c\/li\u003e\n\u003cli\u003eSoftware: Hugging Face LeRobot (feetech motor bus), Waveshare servo tool, Feetech SDK\u003c\/li\u003e\n\u003cli\u003ePower: 9–12.6 V DC in; use 12 V 5 A for six STS3215-C018\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\u003eWaveshare Bus Servo Adapter (A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eServo protocol\u003c\/th\u003e\n\u003ctd\u003eFeetech ST \/ SC series half-duplex TTL bus (STS3215, STS3250, SCS series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHost interface\u003c\/th\u003e\n\u003ctd\u003eUSB-C (CH343 serial) or 3-pin UART header (TX \/ RX \/ GND), selectable by jumper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eServo ports\u003c\/th\u003e\n\u003ctd\u003e2 × 3-pin servo headers; daisy-chain up to 253 servos\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower input\u003c\/th\u003e\n\u003ctd\u003eDC 9–12.6 V via 5.5 × 2.1 mm barrel jack or screw terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOnboard\u003c\/th\u003e\n\u003ctd\u003ePower switch circuitry, PWR LED, brass standoffs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSoftware\u003c\/th\u003e\n\u003ctd\u003eLeRobot Feetech motor bus, Waveshare bus servo tool, Python SDK, Arduino \/ ESP32 \/ Raspberry Pi examples\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003ctd\u003eAbout 40 × 30 mm\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 × Waveshare Bus Servo Adapter (A) with brass standoffs (no cables or power supply)\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eIs this the same as the BusLinker V3.0?\u003c\/h3\u003e\u003cp\u003eFunctionally yes: both turn USB into the Feetech servo bus and pass DC power to the servos. The Waveshare board is the one used in the original SO-100\/SO-101 build guides and LeKiwi; the BusLinker is Hiwonder's version. LeRobot works with either.\u003c\/p\u003e\u003ch3\u003eCan it power the servos from USB?\u003c\/h3\u003e\u003cp\u003eNo. USB only powers the logic. Servos take power from the barrel jack or screw terminal, so connect a 12 V (or 7.4 V) supply.\u003c\/p\u003e\u003ch3\u003eHow many servos can I chain?\u003c\/h3\u003e\u003cp\u003eUp to 253 addresses on one bus; in practice six per arm, limited by the power supply, not the board.\u003c\/p\u003e","brand":"Glunova Biotech","offers":[{"title":"Default Title","offer_id":50760955592943,"sku":"WS-BUS-SERVO-ADAPTER-A","price":20.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/5406\/2063\/files\/01_board_3bad5ddc-26f3-423e-9efb-4d0a4b1df279.jpg?v=1789437184","url":"https:\/\/armdojo.com\/products\/waveshare-bus-servo-adapter-board","provider":"ArmDojo","version":"1.0","type":"link"}