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Is there an (easy) way to receive data from the Remote Console (not VRM) e.g. via a HTTP GET request (SSL). I am using Venus OS.
I need it for a local ESP32 data logger which saves the grid data (Pmin, Pmax, P) every 10 seconds. To dedect consumer analysis (peaks).
Or does anyone know a good local data logger (SD-Card) extension for the Raspi?
I assume that the remote console is only a web server or? If not is there a call/protocol description?
Thanks for the code and tips. Just watched the Victron Note-RED webinar. I think to get a future oriented solution it makes sense to get into Note-RED.
Solution for the Rasbi: Note-RED
Solution for ESP32 <-> EM24: Modbus
Need some time to think about it - thanks!!!
The Node-RED is exactly what I did above in my Code. Node-RED uses NodeJS under the hood and provides the data via Modbus in a visual framework and from there the data will be delivered. Personally I do like more to program it by myself and not use graphical interfaces. Modbus was my favorite because its industrial standard an can control Wago SPS, other brands of inverter (Growatt) etc. I am sure with all that information you will find your way :)
Hi mn,
I am reading that data via ModbusTCP from my EM24 with my Raspberry Pi. I do also set diffrent values in my MultiPlus via the same way. The registerst are very well documented. You can request them vie email on the victron page. Modbus TCP is also possible on the ESP32.
Thanks mazzen for your answer.
Reading EM24 directly via Modbus was my plan B.
Plan C was to read the Rasbi or MuliPlus II registers.
Do you have a sample code or script for the Rasbi? I am not very familiar with the Venus OS, Linux and Rasbi. I come from the microcontroller programming. Do you (or other user) have a code for e.g. ESP32?
But reading the remote console directly can't be difficult. Find unfortunately no documentation.
A very basic example using NodeJS on the Raspi to get the state of the MultiPlus. Take a look at the Excel List from Victron and you will find out that we are looking for Register 31:
| description | Address | Type | Scalefactor | Range | dbus-obj-path | writeable |
| VE.Bus state | 31 | uint16 | 1 | 0 to 65536 | /state | no |
Assuming your IP of the Remoteconsole is 192.168.1.120:
const ModbusRTU = require("modbus-serial");
const modbus_client = new ModbusRTU();
modbus_client.connectTCP("192.168.1.120", { port: 502 });
modbus_client.setID(239);
var multiplus_data = {
state: null
}
function modbus_gatherer() {
function multi_vebus_state(number) {
let result = null;
switch (number) {
case 0:
result = "Off"
break
case 1:
result = "Low Power"
break
case 2:
result = "Fault"
break
case 3:
result = "Bulk"
break
case 4:
result = "Absorption"
break
case 5:
result = "Float"
break
case 6:
result = "Storage"
break
case 7:
result = "Equalize"
break
case 8:
result = "Passthru"
break
case 9:
result = "Inverting"
break
case 10:
result = "Power assist"
break
case 11:
result = "Power supply"
break
case 252:
result = "Bulk protection"
break
}
return result
}
modbus_client.readInputRegisters(31, 1, function (err, data) {
multiplus_data.state = multi_vebus_state(data.data[0])
});
}
interval_modbus_gatherer = setInterval(() => {
modbus_gatherer()
}, 1000);
You can also download tools like https://www.modbustools.com/download.html to easily test your modbus connection. This is by far the best way to get and set data in Victron system.
If you come from Microcontroller programming I you will have zero challange to use the ESP32 Espressif API: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/protocols/modbus.html
Happy coding :-)
