The features of this ModbusRTU-ESP8266-webui firmware are:
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Implementing the Modbus RTU protocol on the NodeMCU (ESP8266) to display in webUI and publish to MQTT
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A simple schematic is in the Documents folder, there are also some screenshots of the webUI on an iPhone
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Registers and formats to be read can be configured in config file Modbusmap.cfg (see file for spec)
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setting for the config file name, default to Modbusmap.cfg , additional file Modbusmaptest.cfg is to debug the code and is automatically loaded when bDebugMBlogic = true during compile. Additional files are included, eg. MBmapUMG96.cfg for Janitza UMG96 and MBmapSolaredge.cfg as examples.
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Strings upto 64 chars in length, being 32 registers, can be read, see config file for specification.
- As Modbus Strings are not clearly defined how to decode, a byteswap option is available (in telnet debug option 8 for now).
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Dynamic MQ Autoconfigure for homeassistant based on registers defined in Modbusmap.cfg
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When MQ is enabled, then the specified Modbus registers are send to MQTT when enabled in Modbusmap.cfg
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Register values can be converted by a set factor in the config file for display in Webui and MQTT (eg. read Wh and display kWh) The value can also be negative.
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Warning : Conversion of int values are rounded to int when factor is applied
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Enable telnet listening (for debugging and some commands, enter h for help)
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Telnet commands are eg: t = toggle relay, l = list Daytime map , d = re-read Daytimemap.cfg, m = Configure MQTT Discovery
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Telnet debug commands are 1,2,3 and 8, 9 (see output of h)
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a REST API (http:///api/v1/Modbus/Modbusmonitor
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settings for Hostname, MQTT and NTP in the webUI
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settings for Modbus baudrate, RTU slave address and read interval in the webUI
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Time/day based setting to enable external relay (GPIO) to allow for day/night energy monitoring/use
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Initially designed to read Jantitza UMG96RM energy monitor registers and display in webUI
To do:
- Byteswap switch in config screen
- Documentation (configuration and operation)
- InfluxDB client to do direct logging
- Update of specific registers through MQTT (low prio)
- In version 2 we might add multiple Modbus devices to be read (very low prio now)
Looking for the documentation?, see the Documentation folder (work in progress).
| Version | Release notes |
|---|---|
| 1.9.1 | Updated libraries, expanded errorlog to find reboot reason, relay allways on failed bug fixed, Wifi sleepmode off |
| 1.9.0 | Breaking change , added stateclass to MQ Autoconfigure for HA , additional parameter in Modbusmap.cfg see examples |
| 1.8.1 | Implement a bootlog to register reboot reason and debug info, copied from rlagerweij Changed: removed ezTime NTP library, moved to ConfigTime NTP and AceTime |
| 1.8.0 | New baseline for future improvements, tested on Arduino 3.0.2 / ESP |
| 1.7.5 | Improved responsiveness WebUI, improved functionality in Relay Temp on switch |
| 1.7.4 | Upgraded libraries, Arduino to 3.0.2. Added in WebUI button Relay temporary on |
| 1.7.3 | Byteswap option added for Modbus_String (via debug for now), String length fix |
| 1.7.2 | Modbusmap config filename via settings, added String type |
| 1.7.1 | Additional debug options, fix coding bugs |
| 1.7.0 | Implement additional types for Solaredge, rework Modbus reader code |
| 1.6.4 | Read interval timer in settings |
| 1.6.3 | Conversion of factor also for MQTT values, plus smaller bug fixes |
| 1.6.2 | Attempt to get Autoconfigure working for Openhab |
| 1.6.1 | Dynamic MQ Autoconfigure from the Modbusmap.cfg file |
| 1.6.0 | Implement MQTT Uniqueid setting, additional debug options |
| 1.5.0 | Rename and cleanup, added Relay Allways On switch |
| 1.4.4 | MQ updates after reading Modbus register |
| 1.4.3 | MQ Pub/Sub name space repaired |
| 1.4.2 | Typo in debug info, additional telnet command (re-read Daytimemap |
| 1.4.1 | Cosmetic changes, cleanup relay function |
| 1.4.0 | GPIO for time/day based switch added |
| 1.3.0 | Migration SPIFFS to LittleFS (not published release) |
| 1.2.0 | MQTT enabled and calculation factor added to config file |
| 1.1.0 | Modbus registers config in external file |
| 1.0.1 | Initial version, based on OTGW-firmware from Robert van den Breemen |