Table Of Contents - Waveshare RS485 TO ETH Manual

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