Alpha version of ModBus-MQTT and MQTT-APRS software.
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@@ -13,6 +13,7 @@ global:
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modbus:
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#port: /dev/serial/by-path/platform-3f980000.usb-usb-0:1.3:1.0-port0 # USB port to which RS-485 dongle is connected
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port: /dev/ttyUSB0
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poll_speed: 60 # Polling speed in seconds
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# Modbus servers settings
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modbus_servers:
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@@ -70,6 +70,7 @@ class config_reader:
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# Test is all expected settings are present
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try:
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tmp = self.config_file_settings['modbus']['port']
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tmp = self.config_file_settings['modbus']['poll_speed']
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except:
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print ("Error in the modbus section of the configuration file.")
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return 0
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@@ -175,7 +175,7 @@ def data_logger(data, configuration):
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except:
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logging.warning("Could not write to file: " + new_filename)
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def send_data_to_mqtt(data, configuration, modbus_registers, mqtt_client):
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def send_data_to_mqtt(data, configuration, modbus_registers, MqttClient):
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mqtt_top_topic = []
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mqtt_full_topic = []
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@@ -208,8 +208,7 @@ def send_data_to_mqtt(data, configuration, modbus_registers, mqtt_client):
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# Go through every input register and match the unit and description with the value
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for index2, entry2 in enumerate(data['InputRegisters']):
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# Scale values
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entry2 = entry2/ (10^entry1['input_register_names'][index2][2])
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entry2 = entry2/ pow(10, entry1['input_register_names'][index2][2])
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message_topic = entry1['input_register_names'][index2][0]
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mqtt_message = str(round(entry2,1))
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mqtt_full_topic = mqtt_top_topic + message_topic
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@@ -234,68 +233,71 @@ def ReconnectModBus(configuration):
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logging.info("Reconnected to ModBus dongle.")
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Configuration, Controller, ModbusAddresses, ModbusRegisters, MqttClient = setup()
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LoopCounter = 0
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def main():
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while (1):
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time.sleep(3) # Sleep for 3 seconds
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Configuration, Controller, ModbusAddresses, ModbusRegisters, MqttClient = setup()
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LoopCounter = 0
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ModBusData={}
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while (1):
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time.sleep(Configuration.config_file_settings['modbus']['poll_speed']) # Sleep for number of seconds given in config.yaml
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# Loop through all configured ModBus devices and try to read the sensor data
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for index, current_modbus_device in enumerate(ModbusAddresses):
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logging.debug("Reading device on ModBus address: " + str(current_modbus_device))
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ModBusData={}
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try:
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ModBusData['DateTime'] = datetime.datetime.now().replace(microsecond=0).isoformat()
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ModBusData['ID'] = Controller[index].get_id()
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if ModBusData['ID'][0] == 0x4D45:
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ModBusData['Type'] = Controller[index].get_type()
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ModBusData['TypeString'] = Controller[index].get_type_string()
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ModBusData['InputRegisters'] = Controller[index].read_all_input_registers()
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# Loop through all configured ModBus devices and try to read the sensor data
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for index, current_modbus_device in enumerate(ModbusAddresses):
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logging.debug("Reading device on ModBus address: " + str(current_modbus_device))
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# Keep the watchdog from resetting the ModBusdevice
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Controller[index].toggle_watchdog()
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NoError = True
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except minimalmodbus.NoResponseError:
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# Handle communication timeout
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logging.warning("No response from the instrument on ModBus address: " + str(current_modbus_device))
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NoError = False
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except minimalmodbus.InvalidResponseError:
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# Handle invalid Modbus responses
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logging.warning("Invalid response from the instrument on ModBus address: " + str(current_modbus_device))
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NoError = False
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except minimalmodbus.SlaveReportedException as e:
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# Handle errors reported by the slave device
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logging.error(f"The instrument reported an error: {e}")
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NoError = False
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except minimalmodbus.ModbusException as e:
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# Handle all other Modbus-related errors
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logging.error(f"Modbus error: {e}")
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NoError = False
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except Exception as e:
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# Handle unexpected errors, probably I/O error in USB/serial
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logging.error(f"Unexpected error: {e}" + ", serial port " + Configuration.config_file_settings['modbus']['port'] + " not available while reading device on ModBus address " + str(ModbusAddresses[index]) + ". Try to reconnect.")
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Controller[index].serial.close()
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ReconnectModBus(Configuration)
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NoError = False
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if NoError == True:
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try:
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logging.debug("Found Mees Electronics sensor on ModBus address " + str(current_modbus_device))
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logging.debug("Serial number: " + hex(ModBusData['ID'][1]) + " " + hex(ModBusData['ID'][2]) + " " + hex(ModBusData['ID'][3]))
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logging.debug("Device type: " + str(ModBusData['Type']) + " (" + ModBusData['TypeString'] + ")")
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logging.debug (ModBusData['InputRegisters'])
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#logging.debug (json.dumps(ModBusData, indent=1, sort_keys=False))
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ModBusData['DateTime'] = datetime.datetime.now().replace(microsecond=0).isoformat()
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ModBusData['ID'] = Controller[index].get_id()
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if ModBusData['ID'][0] == 0x4D45:
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ModBusData['Type'] = Controller[index].get_type()
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ModBusData['TypeString'] = Controller[index].get_type_string()
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ModBusData['InputRegisters'] = Controller[index].read_all_input_registers()
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except:
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logging.warning("Modbus device type " + str(ModBusData['Type']) + " not found in register definition file. Ignoring sensor data.")
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# Keep the watchdog from resetting the ModBusdevice
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Controller[index].toggle_watchdog()
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# Log sensor data to file if enabled in configuration file
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data_logger(ModBusData, Configuration)
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NoError = True
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except minimalmodbus.NoResponseError:
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# Handle communication timeout
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logging.warning("No response from the instrument on ModBus address: " + str(current_modbus_device))
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NoError = False
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except minimalmodbus.InvalidResponseError:
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# Handle invalid Modbus responses
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logging.warning("Invalid response from the instrument on ModBus address: " + str(current_modbus_device))
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NoError = False
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except minimalmodbus.SlaveReportedException as e:
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# Handle errors reported by the slave device
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logging.error(f"The instrument reported an error: {e}")
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NoError = False
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except minimalmodbus.ModbusException as e:
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# Handle all other Modbus-related errors
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logging.error(f"Modbus error: {e}")
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NoError = False
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except Exception as e:
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# Handle unexpected errors, probably I/O error in USB/serial
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logging.error(f"Unexpected error: {e}" + ", serial port " + Configuration.config_file_settings['modbus']['port'] + " not available while reading device on ModBus address " + str(ModbusAddresses[index]) + ". Try to reconnect.")
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Controller[index].serial.close()
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ReconnectModBus(Configuration)
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NoError = False
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# Send sensor data to MQTT broker
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send_data_to_mqtt(ModBusData, Configuration, ModbusRegisters.definition_file_data, MqttClient)
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if NoError == True:
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try:
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logging.debug("Found Mees Electronics sensor on ModBus address " + str(current_modbus_device))
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logging.debug("Serial number: " + hex(ModBusData['ID'][1]) + " " + hex(ModBusData['ID'][2]) + " " + hex(ModBusData['ID'][3]))
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logging.debug("Device type: " + str(ModBusData['Type']) + " (" + ModBusData['TypeString'] + ")")
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#logging.debug (ModBusData['InputRegisters'])
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#logging.debug (json.dumps(ModBusData, indent=1, sort_keys=False))
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except:
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logging.warning("Modbus device type " + str(ModBusData['Type']) + " not found in register definition file. Ignoring sensor data.")
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# Log sensor data to file if enabled in configuration file
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data_logger(ModBusData, Configuration)
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# Send sensor data to MQTT broker
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send_data_to_mqtt(ModBusData, Configuration, ModbusRegisters.definition_file_data, MqttClient)
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if __name__ == '__main__':
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main()
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