Name: Campbell CR310
Brand: Campbell
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3. Confirm data is being received in the Subscription area at the bottom of the screen.

19.4.2 Check broker for incoming data

To subscribe to MQTT topics an MQTT client is required. There are many available; it is

recommended that you consult with an ITprofessional. This example uses the Google Chrome

extension MQTTBox .

1. Launch MQTTBox.

19. Communications protocols133

Default Chapter3
- Table of Contents3
1 Introduction17
2 Precautions18
3 Initial Inspection19
4 CR300 Series Data Acquisition System Components20
- The CR300 Series Data Logger21
- Sensors23
5 Wiring Panel and Terminal Functions24
- Power Input26
  - Power LED Indicator28
- Power Output28
- Grounds29
- Communications Ports30
- Programmable Logic Control32
6 Setting up the CR300 Series34
7 Setting up Communications with the Data Logger35
8 USB or RS-232 Communications37
9 Virtual Ethernet over USB (RNDIS)40
10 Ethernet Communications Option42
- Configuring Data Logger Ethernet Settings42
- Ethernet Leds43
- Setting up Ethernet Communications between the Data Logger and Computer43
11 Wi-Fi Communications Option45
- Hosting a Wi-Fi Network45
- Joining a Wi-Fi Network49
  - Configure the Data Logger to Join a Wi-Fi Network50
  - Set up Loggernet or PC400W50
- Wi-Fi LED Indicator51
12 Cellular Communications Option53
- Pre-Installation54
- Installation57
  - Modules Using Konect Pakbus Router (Private Dynamic IP)57
  - Modules Using a Public Static IP62
- Cellular (TX/RX) LED Indicator66
- Signal Strength and Quality66
  - Signal Strength66
  - Signal Quality67
13 Radio Communications Option68
- Configuration Options69
- Basic RF407 Networks70
  - Configure the Base RF407-Series Radio70
  - Configure the Remote RF407-Series Data Logger(S)72
- RF407-Series Radio Communications with Multiple Data Loggers through a Data Logger Router75
14 Testing Communications with Ezsetup85
- Making the Software Connection86
15 Creating a Short Cut Data Logger Program87
- Sending a Program to the Data Logger90
16 Working with Data92
- Default Data Tables92
- Collecting Data93
  - Collecting Data Using Loggernet93
  - Collecting Data Using PC40094
- Viewing Historic Data94
- Data Types and Formats95
- About Data Tables98
  - Header Rows99
  - Data Records101
- Creating Data Tables in a Program101
17 Data Memory104
- Data Tables104
- Flash Memory105
  - CPU Drive105
18 Measurements106
- Voltage Measurements106
  - Single-Ended Measurements107
  - Differential Measurements108
- Current-Loop Measurements108
  - Voltage Ranges for Current Measurements109
  - Example Current-Loop Measurement Connections109
- Resistance Measurements111
- Period-Averaging Measurements117
- Pulse Measurements118
- Vibrating Wire Measurements123
  - Vspect123
19 Communications Protocols124
- General Serial Communications125
- Modbus Communications126
- Internet Communications136
- Mqtt138
  - Sending Data to an MQTT Broker138
  - Check Broker for Incoming Data149
- DNP3 Communications151
- Pakbus Communications152
- Communications153
20 Installation158
- Default Program159
- Data Logger Security160
- Web Interface173
- Power Budgeting173
- Field Work174
- Data Logger Enclosures174
- Electrostatic Discharge and Lightning Protection175
21 CR300 Series Maintenance177
- Data Logger Calibration177
- Internal Battery178
  - Replacing the Internal Battery179
- Updating the Operating System179
  - Sending an Operating System to a Local Data Logger180
  - Sending an Operating System to a Remote Data Logger181
- Gzip182
22 Tips and Troubleshooting184
- Checking Station Status185
- Understanding NAN and INF Occurrences187
- Timekeeping188
- Crbasic Program Errors190
  - Program Does Not Compile191
  - Program Compiles but Does Not Run Correctly191
- Troubleshooting Radio Communications192
- Reducing out of Memory Errors192
- Resetting the Data Logger192
- Troubleshooting Power Supplies194
- Using Terminal Mode195
- Ground Loops200
- Improving Voltage Measurement Quality205
- Field Calibration217
- File Name and Resource Errors217
23 Information Tables and Settings (Advanced)218
- Datatableinfo Table System Information219
- Status Table System Information220
- Settings227
24 CR300 Series Specifications255
- System Specifications255
- Physical Specifications256
- Power Requirements256
- Power Output Specifications258
- Analog Measurement Specifications259
- Pulse Measurement Specifications263
- Digital Input/Output Specifications264
  - Pulse-Width Modulation265
- Communications Specifications265
- Standards Compliance Specifications268
Appendix A. Configure Cellular Settings and Retrieve Status Information with Setsetting()270
Appendix B. Cellular Module Regulatory Information271
- Important Information for Australian Users271
- RF Exposure271

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General

Brand	Campbell
Model	CR310
Category	Data Loggers
Language	English

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Table of Contents

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