MODWRT2
For the previous version of MODWRT see here ModWRT.
Modbus RTU to Emoncms Influxdb Thingspeak
Modbus to Emoncms. The ModWRT is a Modbus RTU unit to interface with one or several RS485 RTU devices. The ModWRT sends a predefined set of registers value to a server for data logging and display.
The end server can be either of type Emoncms, Influxdb or Thingspeak.
All communication and dataflow parameters are configured using a web interface.
Technical Specifications
- RS485 port for RTU
- Ethernet port
- Integrated Wifi
- Micro-usb Power supply
- Operating system: OpenWRT 15.05
- Flash Memory: 16MB
- PCB Dimensions: 55x40mm
- Optional Wifi antenna
Hardware
PCB
A complete MODWRT includes the base board and a SKW71 Module.
The base board can be purchased here.(not on sale yet. Contact us for more details.)
The SKW71 module can be found here.
Enclosure
The Modwrt PCB fits in an aluminium enclosure with 40x64x30mm dimensions.
3D printed end plate are available.
Software
The ModWRT web interface is build within the OpenWRT web interface.
There are three main functional area which are:
1/ RTU's definitions
2/ Servers definitions
3/ Dataflow configuration (ie which data goes where).
The web interface is briefly described below. See more details in the user manual.
1. RTU definition
All Modbus RTU devices can be configured on one single page using Slave ID and communication parameters (baud rate etc).
2. Stream to Emoncms, Influxdb, Thingspeak definition
Internet of Thing (iot) servers can be configured on this page.
3. Dataflow Configuration
This page will configure all dataflow combination.
A single dataflow can query different RTU unit to send combined data onto a single export.
As an example the above example will display the following data on Emoncms.
User Manual
Emonwrt3 Network Configuration (same applies for EMonwrt3 and Modwrt).