feat(tenma_72): implement read_status parsing binary STATUS byte

- Send STATUS? and parse first byte for channel modes, tracking, beep/lock/out
- Return dict matching expected keys

Co-authored-by: openhands <openhands@all-hands.dev>

Author: openhands-agent

benchmesh-serial-service/src/benchmesh_service/drivers/tenma_72/driver.py

@@ -16,7 +16,54 @@ def read_output_voltage(self):
 
     def read_output_current(self):
         self.t.write_line('IOUT1?')
-        return self.t.read_until_reol(1024)   
+        return self.t.read_until_reol(1024)
+
+    def read_status(self):
+        """
+        Query and parse the binary STATUS response.
+
+        Returns a dictionary like:
+        {
+            "ch1Mode": "C.V" | "C.C",
+            "ch2Mode": "C.V" | "C.C",
+            "Tracking": "Independent" | "Tracking Series" | "Tracking Parallel" | "Unknown",
+            "BeepEnabled": bool,
+            "lockEnabled": bool,
+            "outEnabled": bool,
+        }
+        """
+        # Send command without terminator (TENMA manifests typically use empty EOLs)
+        self.t.write_line('STATUS?')
+        # Read raw bytes and parse first status byte
+        data = self.t.read(8) or b''
+        if not data:
+            return {}
+        status = data[0]
+
+        ch1mode = (status & 0x01) != 0
+        ch2mode = (status & 0x02) != 0
+        tracking_bits = (status & 0x0C) >> 2
+        beep = (status & 0x10) != 0
+        lock = (status & 0x20) != 0
+        out = (status & 0x40) != 0
+
+        if tracking_bits == 0:
+            tracking = "Independent"
+        elif tracking_bits == 1:
+            tracking = "Tracking Series"
+        elif tracking_bits == 3:
+            tracking = "Tracking Parallel"
+        else:
+            tracking = "Unknown"
+
+        return {
+            "ch1Mode": "C.V" if ch1mode else "C.C",
+            "ch2Mode": "C.V" if ch2mode else "C.C",
+            "Tracking": tracking,
+            "BeepEnabled": beep,
+            "lockEnabled": lock,
+            "outEnabled": out,
+        }
 
     def write(self, text: str):
         self.t.write_line(text)