feat(core): change rover_platform parameter to override, default with hostname instead of environment variable

Launch file uses clucky, testbed, auto. Node was using core, testbed, auto. Replaced core with clucky in the node.

src/anchor_pkg/launch/rover.launch.py

@@ -58,10 +58,10 @@ def generate_launch_description():
 
     ld.add_action(
         DeclareLaunchArgument(
-            "rover_platform",
-            default_value="auto",
-            description="Choose the rover platform (either clucky or testbed). If left on auto, will defer to ROVER_PLATFORM environment variable.",
-            choices=["clucky", "testbed", "auto"],
+            "rover_platform_override",
+            default_value="",
+            description="Override the rover platform (either clucky or testbed). If unset, hostname is used; defaults to clucky without hostname.",
+            choices=["clucky", "testbed", ""],
         )
     )
 
@@ -120,8 +120,8 @@ def generate_launch_description():
                     )
                 },
                 {
-                    "rover_platform": LaunchConfiguration(
-                        "rover_platform", default="auto"
+                    "rover_platform_override": LaunchConfiguration(
+                        "rover_platform_override", default="auto"
                     )
                 },
             ],

src/arm_pkg/arm_pkg/arm_node.py

@@ -78,9 +78,7 @@ class ArmNode(Node):
             self.anchor_sub = self.create_subscription(
                 String, "/anchor/arm/feedback", self.anchor_feedback, 10
             )
-            self.anchor_pub = self.create_publisher(
-                String, "/anchor/to_vic/relay_string", 10
-            )
+            self.anchor_pub = self.create_publisher(String, "/anchor/relay", 10)
 
             # Create publishers
             self.socket_pub = self.create_publisher(

src/core_pkg/core_pkg/core_node.py

@@ -5,6 +5,7 @@ from scipy.spatial.transform import Rotation
 from math import copysign, pi
 from warnings import deprecated
 from os import getenv
+from socket import gethostname
 
 import rclpy
 from rclpy.node import Node
@@ -56,7 +57,7 @@ class CoreNode(Node):
         56: 4,  # really 3, but viccan
         58: 4,  # ditto
     }
-    rover_platform: Literal["core", "testbed"]
+    rover_platform: Literal["clucky", "testbed"]
 
     def __init__(self):
         super().__init__("core_node")
@@ -71,19 +72,28 @@ class CoreNode(Node):
             self.get_parameter("use_ros2_control").get_parameter_value().bool_value
         )
 
-        self.declare_parameter("rover_platform", "auto")
+        self.declare_parameter("rover_platform_override", "")
         rover_platform = (
-            self.get_parameter("rover_platform").get_parameter_value().string_value
+            self.get_parameter("rover_platform_override")
+            .get_parameter_value()
+            .string_value
         )
-        if rover_platform == "auto":
-            self.get_logger().info(
-                "rover_platform parameter is unset, falling back to environment variable"
+        # Verify rover_platform_override value is valid
+        if rover_platform not in ("clucky", "testbed", ""):
+            # Keeping this here, because I want a value error only if the user manually
+            # overrides using a bad value. If we can't determine it automatically
+            # from hostname, then default to clucky.
+            self.get_logger().fatal(
+                "Invalid rover_platform_override parameter value. If set, must be 'clucky' or 'testbed'."
             )
-            rover_platform = getenv("ROVER_PLATFORM", "auto")
-        if rover_platform not in ("core", "testbed"):  # make sure we have a valid value
-            raise ValueError("rover platform must be either 'core' or 'testbed'.")
-        else:
-            self.rover_platform = cast(Literal["core", "testbed"], rover_platform)
+        # Attempt to determine platform from hostname, default to clucky on failure
+        rover_platform = rover_platform or gethostname().lower()
+        if rover_platform not in ("clucky", "testbed"):
+            self.get_logger().info(
+                "rover_platform defaulting to clucky, not overridden and could not determine from hostname."
+            )
+            rover_platform = "clucky"
+        self.rover_platform = cast(Literal["clucky", "testbed"], rover_platform)
 
         if self.rover_platform == "testbed":
             global TESTBED_WHEELBASE, TESTBED_WHEEL_RADIUS, TESTBED_GEAR_RATIO
@@ -179,9 +189,19 @@ class CoreNode(Node):
             Barometer, "/core/feedback/baro", qos_profile=qos.qos_profile_sensor_data
         )
 
+        ###################################################
+        # Timers
+
+        if self.use_ros2_control:
+            self.vel_cmd_timer_ = self.create_timer(0.1, self.vel_cmd_timer_callback)
+
         ###################################################
         # Saved state
 
+        # Controls
+        self._last_joint_command_time = self.get_clock().now()
+        self._last_joint_command_msg = JointState()
+
         # Main Core feedback
         self.feedback_new_state = NewCoreFeedback()
         self.feedback_new_state.fl_motor.id = 1
@@ -273,16 +293,31 @@ class CoreNode(Node):
             )
             return
 
-        (bl_vel, br_vel, fl_vel, fr_vel) = msg.velocity
+        # A 10 Hz timer callback actually sends these commands to Core for rate limiting
+        # These come from ros2_control at 50 Hz
+        self._last_joint_command_time = self.get_clock().now()
+        self._last_joint_command_msg = msg
 
+    def vel_cmd_timer_callback(self):
+        # Safety timeout for diff_drive_controller commands via topic_based_ros2_control.
+        # It is safe to send stop command here because if self.use_ros2_control,
+        # then this is the only callback that is controlling Core's motors.
+        if self.get_clock().now() - self._last_joint_command_time > Duration(
+            nanoseconds=int(1e8)  # 100ms
+        ):
+            self.send_viccan(20, [0.0, 0.0, 0.0, 0.0])
+            return
+
+        # This order is verified by the subscription callback
+        (bl_vel, br_vel, fl_vel, fr_vel) = self._last_joint_command_msg.velocity
+
+        # Convert wheel rad/s to motor RPM
         bl_rpm = radps_to_rpm(bl_vel) * self.gear_ratio
         br_rpm = radps_to_rpm(br_vel) * self.gear_ratio
         fl_rpm = radps_to_rpm(fl_vel) * self.gear_ratio
         fr_rpm = radps_to_rpm(fr_vel) * self.gear_ratio
 
-        self.send_viccan(
-            20, [fl_rpm, bl_rpm, fr_rpm, br_rpm]
-        )  # order expected by embedded
+        self.send_viccan(20, [fl_rpm, bl_rpm, fr_rpm, br_rpm])  # REV Velocity
 
     def twist_man_callback(self, msg: Twist):
         linear = msg.linear.x  # [-1 1] for forward/back from left stick y

src/headless_pkg/src/headless_node.py

@@ -366,10 +366,14 @@ class Headless(Node):
             )  # Exponent for finer control (curve)
 
             # This kinda looks dumb being seperate from the following block, but this
-            # maintains the separation between modifying the control message and sending it
+            # maintains the separation between modifying the control message and sending it.
             if self.use_cmd_vel:
-                twist.linear.x *= 1.5
-                twist.angular.z *= 0.5
+                # These scaling factors convert raw stick inputs to absolute m/s and rad/s
+                # values that DiffDriveController will convert to motor RPM, rather than
+                # the plain Twist, which just sends the stick values as duty cycle and
+                # sends that scaled to the motors.
+                twist.linear.x *= 1.0
+                twist.angular.z *= 1.5
 
             # Publish
             if self.use_cmd_vel: