{"publisher":"Xirkit — the structured parts marketplace","canonical":"https://www.xirkit.io/products/waveshare-servo-driver-with-esp32-e517","markdown":"https://www.xirkit.io/products/waveshare-servo-driver-with-esp32-e517/data.md","mcp":"https://www.xirkit.io/mcp","note":"Every value is traced to a cited source (see sources and per-value src). Null means unknown, never zero.","record":{"id":"e517763a-027e-5237-9c11-e82015f99135","mpn":"Servo Driver with ESP32","name":"Waveshare Servo Driver with ESP32","manufacturer":"Waveshare","family":"dev_board","summary":"Waveshare Servo Driver with ESP32 (SKU 21593) is a 65 × 30 mm ESP32-WROOM-32 board that drives up to 253 SC/ST serial bus servos (ST3215, STS3215) from two 3-pin S/V/G headers: half-duplex UART1 on GPIO19 (TX) / GPIO18 (RX), 6–12 V DC jack passed straight to the servos, 0.91″ OLED on I2C GPIO21/22, two WS2812 LEDs on GPIO23, CP2102 USB-C, about $16.","schema_version":"3.0","revision":null,"tags":["dev_board","servo driver","bus servo controller","serial bus servo","st3215","sts3215","feetech","esp32","esp32-wroom-32","waveshare","robotic arm","robot hand","hexapod","wifi","bluetooth","esp-now","oled","uart","usb-c","arduino ide","development board"],"sources":[{"other":{},"id":"datasheet","url":"https://www.waveshare.com/wiki/Servo_Driver_with_ESP32","title":"Waveshare 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datasheet","publisher":"Waveshare","kind":"datasheet","retrieved_at":"2026-10-15T04:24:54+00:00","field_paths":["spec.constraints.electrical.io_voltage_v","spec.constraints.electrical.logic_high_min_v","spec.constraints.electrical.pin_drive_max_ma","spec.constraints.electrical.supply_voltage_max_v","spec.constraints.electrical.supply_voltage_min_v","spec.geometry.cad.assumptions","spec.geometry.cad.bbox.height_mm","spec.geometry.cad.bbox.length_mm","spec.geometry.cad.bbox.width_mm","spec.geometry.cad.envelope_complete","spec.geometry.cad.mesh_path","spec.geometry.cad.step_path","spec.geometry.cad.verification","spec.geometry.dimensions.length_mm","spec.geometry.dimensions.width_mm","spec.geometry.mounting_holes","spec.provides.capabilities","spec.provides.features","spec.provides.memory.sram_kb","spec.provides.software_frameworks","spec.provides.wireless","spec.usage.connectors","spec.usage.pin_mappings","spec.usage.pinout","spec.usage.pinout_complete","spec.usage.requirements.power_inputs"],"notes":"sha256 88e1643f0d5828614b0771e084de4a035205456d1714e93dca03c32e99b2756a"},{"other":{},"id":"offer0","url":"https://www.waveshare.com/servo-driver-with-esp32.htm","title":"www.waveshare.com listing","publisher":null,"kind":"distributor","retrieved_at":"2026-10-15T04:32:23+00:00","field_paths":["offers"],"notes":null}],"assets":[{"other":{},"kind":"datasheet","url":"https://www.waveshare.com/wiki/Servo_Driver_with_ESP32","label":"Datasheet","verification":"manufacturer","notes":null},{"other":{},"kind":"image","url":"https://www.waveshare.com/media/catalog/product/cache/1/image/560x560/9df78eab33525d08d6e5fb8d27136e95/s/e/servo-driver-with-esp32-1.jpg","label":"Waveshare Servo Driver with ESP32 — top view (OLED, USB-C, two servo ports, DC jack)","verification":"manufacturer","notes":"inspected: black PCB with 0.91 in blue OLED, USB-C with EN/BOOT buttons, two RGB LEDs, CP2102 QFN, two white 3-pin servo ports and a 5.5 mm DC jack, four corner holes; maker store photo"},{"other":{},"kind":"cad","url":"waveshare-servo-driver-with-esp32.step","label":"STEP (generated from datasheet drawing)","verification":"generated","notes":"cad_check passed"}],"offers":[{"other":{"sku":"21593","price_breaks":[]},"supplier":"www.waveshare.com","url":"https://www.waveshare.com/servo-driver-with-esp32.htm","currency":"USD","unit_price":15.99,"stock_status":"in_stock","region":"US","minimum_quantity":null,"checked_at":"2026-10-15T04:32:23+00:00","lead_time_days_min":null,"lead_time_days_max":null,"destination":"US","destination_postal_code":null,"notes":null,"price_basis":"listed","unit_price_max":null}],"best_for":[{"other":{},"label":"Robotics and motor control","reason":"Drives up to 253 SC/ST serial bus servos (ST3215, STS3215) over half-duplex UART1 on GPIO18/19, with angle, load and voltage read-back.","basis":"engineering_inference"},{"other":{},"label":"Robot joints and actuation","reason":"Main controller for bus-servo robot arms, hands, hexapods and humanoids; two S/V/G servo ports fed straight from the 6–12 V jack.","basis":"engineering_inference"},{"other":{},"label":"Connected IoT and wireless sensor nodes","reason":"ESP32 Wi-Fi, Bluetooth and ESP-NOW for remote servo control from the open-source web app.","basis":"engineering_inference"}],"children":[{"other":{},"ref_id":"e517763a-027e-5237-9c11-e82015f99135--module","role":"wireless_module","count":1,"notes":"Espressif Systems ESP32-WROOM-32"},{"other":{},"ref_id":"e517763a-027e-5237-9c11-e82015f99135--mcu","role":"main_processor","count":1,"notes":"Espressif Systems ESP32"},{"other":{},"ref_id":"e517763a-027e-5237-9c11-e82015f99135--u2","role":"usb_uart_bridge","count":1,"notes":"Silicon Labs CP2102"},{"other":{},"ref_id":"e517763a-027e-5237-9c11-e82015f99135--u3","role":"ldo_regulator","count":1,"notes":"Advanced Monolithic Systems AMS1117-3.3"},{"other":{},"ref_id":"e517763a-027e-5237-9c11-e82015f99135--u4","role":"bus_buffer","count":1,"notes":"Texas Instruments SN74LVC1G126DBV"},{"other":{},"ref_id":"e517763a-027e-5237-9c11-e82015f99135--u5","role":"bus_buffer","count":1,"notes":"Texas Instruments SN74LVC1G125DBV"},{"other":{},"ref_id":"e517763a-027e-5237-9c11-e82015f99135--u6","role":"display","count":1,"notes":"Solomon Systech (controller) SSD1306 0.91\" 128x32 OLED"}],"spec":{"other":{},"usage":{"other":{},"pinout":[{"id":"CN1-VCC","kind":"power_in","label":"VIN 6-12V","notes":"DC-044 5.5×2.1 mm barrel jack, 6–12 V; input voltage must match the servos","other":{},"reserved":false,"connector":"CN1","functions":["power_in"],"electrical":{"input_voltage":{"max":12,"min":6,"unit":"V","source":"p.21 table 21_1","conditions":"must match the servo voltage — passed straight to the servo headers"}}},{"id":"CN1-GND","kind":"ground","label":"GND","other":{},"reserved":false,"connector":"CN1","functions":["ground"],"voltage_v":0,"electrical":{}},{"id":"H2-1","kind":"signal","label":"S","notes":"serial bus servo DATA (half-duplex UART1 via SN74LVC1G125/126 buffers)","other":{},"position":"1","reserved":false,"connector":"H2","functions":["s"],"electrical":{}},{"id":"H2-2","kind":"power_out","label":"V","notes":"servo supply = DC jack input 6–12 V (not regulated)","other":{},"position":"2","reserved":false,"connector":"H2","functions":["power_out"],"electrical":{}},{"id":"H2-3","kind":"ground","label":"G","other":{},"position":"3","reserved":false,"connector":"H2","functions":["ground"],"voltage_v":0,"electrical":{}},{"id":"H3-1","kind":"signal","label":"S","notes":"serial bus servo DATA (same net as H2-1)","other":{},"position":"1","reserved":false,"connector":"H3","functions":["s"],"electrical":{}},{"id":"H3-2","kind":"power_out","label":"V","notes":"servo supply = DC jack input 6–12 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DTR/RTS)","other":{},"position":"3","reserved":false,"connector":"M1","functions":["en"],"electrical":{"vih":{"max":3.6,"min":2.475,"unit":"V","source":"ESP32-D0WD-V3 datasheet p.52 table 52_1","conditions":"VDD=3.3V; 25 °C; chip u1 CHIP_PU"},"vil":{"max":0.6,"unit":"V","source":"ESP32-D0WD-V3 datasheet p.52 table 52_1","conditions":"VDD=3.3V; 25 °C; chip u1 CHIP_PU"},"five_volt_tolerant":{"value":false,"source":"ESP32-D0WD-V3 datasheet p.52 table 52_1","conditions":"VDD=3.3V; 25 °C; chip u1 CHIP_PU"}},"boot_strapping":false,"five_volt_tolerant":false},{"id":"M1-25","kind":"gpio","label":"IO0","notes":"BOOT button S1 (KEY_FLASH, 10K pull-up R5) and auto-program transistor VT2; strapping pin","other":{},"position":"25","reserved":false,"connector":"M1","functions":["GPIO0","ADC2_CH1","RTC_GPIO11","TOUCH1","EMAC_TX_CLK","CLK_OUT1","GPIO matrix (UART/I2C/I2S/SPI/LEDC PWM/MCPWM/RMT/PCNT/TWAI routable)"],"voltage_v":3.3,"electrical":{"ioh":{"typ":40,"unit":"mA","source":"ESP32-D0WD-V3 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52_1","conditions":"VDD=3.3V; 25 °C; chip u1 GPIO1"},"five_volt_tolerant":{"value":false,"source":"ESP32-D0WD-V3 datasheet p.52 table 52_1","conditions":"VDD=3.3V; 25 °C; VIH max = VDD + 0.3 V; chip u1 GPIO1"}},"max_drive_ma":28,"boot_strapping":false,"five_volt_tolerant":false},{"id":"M1-34","kind":"gpio","label":"U0RXD","notes":"UART0 RX ← CP2102 TXD via 100R (R1)","other":{},"position":"34","reserved":false,"connector":"M1","functions":["GPIO3","U0RXD","CLK_OUT2","GPIO matrix (UART/I2C/I2S/SPI/LEDC PWM/MCPWM/RMT/PCNT/TWAI routable)"],"voltage_v":3.3,"electrical":{"ioh":{"typ":40,"unit":"mA","source":"ESP32-D0WD-V3 datasheet p.52 table 52_1","conditions":"VDD=3.3V; 25 °C; VOH ≥ 2.64 V, max drive strength; chip u1 GPIO3"},"iol":{"typ":28,"unit":"mA","source":"ESP32-D0WD-V3 datasheet p.52 table 52_1","conditions":"VDD=3.3V; 25 °C; VOL = 0.495 V, max drive strength; chip u1 GPIO3"},"vih":{"max":3.6,"min":2.475,"unit":"V","source":"ESP32-D0WD-V3 datasheet p.52 table 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SKU — Servo Driver with ESP32 (servos not included; screws pack)"}]},"null_reasons":{"weight":{"note":"store \"Weight: 0.021 kg\" is Waveshare shipping weight, not the board mass","reason":"not_in_source"},"flash_kb":{"note":"module flash size not stated (ESP32-WROOM-32 ships in 4/8/16 MB)","reason":"not_in_source"},"psram_kb":{"note":"WROOM-32 has no PSRAM","reason":"not_applicable"},"lifecycle":{"note":"no lifecycle statement","reason":"not_in_source"},"thickness":{"note":"PCB thickness not printed; CAD uses an explicit 1.6 mm assumption","reason":"not_in_source"},"compliance":{"note":"no certification statement for the board","reason":"not_in_source"},"gpio_count":{"note":"no GPIO header — all used ESP32 pads go to on-board circuits (servo bus, OLED, LEDs, USB-UART)","reason":"not_applicable"},"output_current":{"note":"buck converter IC is unmarked on the schematic and no 5 V / 3.3 V current limit is stated","reason":"not_in_source"},"supply_current":{"note":"no board or servo-port 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