Waveshare RS485 TO ETH - Table of Contents

485 TO ETH (B) User Manual
2 / 36 www.waveshare.com
CONTENTS
1. Overview
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3
2. JSON simple example
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3
2.1. Modbus RTU to JSON
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3
2.2. Modbus table
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3
2.3. Device configuration
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4
2.4. Create a new Modbus analog meter
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10
3. JSON complex example
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11
3.1. Enable NTP
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11
3.2. Nested JSON design
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11
3.3. Read the bits of the byte register
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13
3.4. 01 and 02 function codes
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14
3.5. Show design results
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15
3.6. Excel editing
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16
3.7. Brackets and arrays
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17
3.8. Cannot read and clear
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21
3.9. Device offline
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22
3.10. Pan and zoom
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23
3.11. Data change reporting
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23
3.12. JSON issuance
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24
3.13. 645 Timing of the agreement
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25
4. JSON to Modbus RTU
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26
5. MQTT
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28
5.1. Device configuration
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28
5.2. Data Test
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33
6. MQTT+JSON to Modbus RTU
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34
7. HTTP POST/GET+JSON
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34