# xArmServoController
Servo controller libraries for Lewan-Soul/Lobot/Hiwonder xArm and LeArm 6-DOF robotic arm.
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Table of Content
TTL Serial Control
The control board mounted on the base of the xArm has a 4-pin connector which provides a signal path and power to an external host controller.
| Pin | Description |
|---|---|
| GND | Power and signal ground. |
| TX | Serial TTL signal from xArm to host controller. Mark = 5VDC, Space = 0VDC. |
| RX | - Serial TTL signal from host controller to xArm. Mark = 5VDC, Space = 0VDC. |
| 5V | 5 Volts DC power for eternal host controller. Current rating is not yet known. In most circumstances this is left unconnected.Warning: Do not connect to an external power source. Doing so will cause the xArm to beep loudly and may damage the control board. |