added POC for temperature logging

src/damaris/tools/eurotherm.py

@@ -3,6 +3,8 @@ import re
 import operator
 from functools import reduce
 
+from .temperature import TemperatureController, register_controller
+
 
 DEBUG=False
 
@@ -40,7 +42,7 @@ def checksum(message):
 	bcc = (reduce(operator.xor, list(map(ord,message))))
 	return chr(bcc)
 
-class Eurotherm(object):
+class Eurotherm(TemperatureController):
 	def __init__(self, serial_device, baudrate = 19200):
 		self.device = standard_device
 		# timeout: 110 ms to get all answers.
@@ -100,6 +102,39 @@ class Eurotherm(object):
 	def get_setpoint_temperature(self):
 		return self.read_param('SL')
 
+	# TemperatureController interface implementation
+
+	def get_temperature(self) -> float:
+		"""Read current temperature in Celsius."""
+		temp = self.read_param('PV')
+		if temp is None:
+			return 0.0
+		try:
+			return float(temp)
+		except (ValueError, TypeError):
+			return 0.0
+
+	def get_setpoint(self) -> float:
+		"""Read target setpoint temperature in Celsius."""
+		temp = self.read_param('SL')
+		if temp is None:
+			return 0.0
+		try:
+			return float(temp)
+		except (ValueError, TypeError):
+			return 0.0
+
+	def set_setpoint(self, temperature: float) -> bool:
+		"""Set target temperature in Celsius."""
+		return self.write_param('SL', str(temperature))
+
+	def close(self):
+		"""Close the serial connection."""
+		if hasattr(self, 's') and self.s is not None:
+			if self.s.is_open:
+				self.s.close()
+			self.s = None
+
 if __name__ == '__main__':
 	import time
 	delta=5
@@ -118,3 +153,6 @@ if __name__ == '__main__':
 			f.write(l)
 			f.flush()
 		f.write('# MARK -- %s --\n'%(time.asctime()))
+
+# Register Eurotherm with the factory
+register_controller('eurotherm', Eurotherm)