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introduce lastException and lastReadValue for communication with CmdServer

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This commit is contained in:
Wolfgang Hottgenroth 2019-07-28 01:14:21 +02:00
parent b6077b0ec8
commit b97b849bfa
Signed by: wn
GPG Key ID: 6C1E5E531E0D5D7F
1 changed files with 6 additions and 0 deletions
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6
src/RegisterDatapoint.py
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@ -59,6 +59,8 @@ class HoldingRegisterDatapoint(AbstractModbusDatapoint):
self.feedbackTopic = feedbackTopic
self.writeRequestValue = None
self.type = 'holding register'
self.lastException = None
self.lastReadValue = None
def __str__(self):
return ("[{0!s}, publishTopic: {1}, subscribeTopic: {2}, feedbackTopic: {3}, "
@ -81,6 +83,7 @@ class HoldingRegisterDatapoint(AbstractModbusDatapoint):
else:
values = [int(self.writeRequestValue)]
except Exception as e:
self.lastException = e
raise DatapointException("Exception caught when trying to converter modbus data: {0!s}".format(e))
result = client.write_registers(address=self.address,
unit=self.unit,
@ -96,6 +99,7 @@ class HoldingRegisterDatapoint(AbstractModbusDatapoint):
unit=self.unit)
if type(result) in [ExceptionResponse, ModbusIOException]:
self.errorCount += 1
self.lastException = result
raise DatapointException(result)
logger.debug("{0}: {1!s}".format(self.label, result.registers))
value = None
@ -106,7 +110,9 @@ class HoldingRegisterDatapoint(AbstractModbusDatapoint):
else:
value = result.registers
except Exception as e:
self.lastException = e
raise DatapointException("Exception caught when trying to converter modbus data: {0!s}".format(e))
self.lastReadValue = value
if self.publishTopic:
pubQueue.put(MqttProcessor.PublishItem(self.publishTopic, str(value)))
self.lastContact = datetime.datetime.now()