Modbus TCP add to Homey Pro

Mats_Andersson_Frid · January 22, 2023, 6:33pm

Hi again
Hope 2023 has started well: Anyone have any solution to read modbus tcp to homey pro. And if so, how I should go about installation and what hardware I may need.

Sincerely, Lord Mats AF

Edwin_Biemond · February 7, 2023, 1:39pm

I use it on my SolarEdge app but it is just way of communication. Not like a zigbee device.

You need to build an app around it. Add a device which read the modbus registers and you have to make capabilities of them.

Adrian_Rockall · February 8, 2023, 8:09am

Also, if SolarEdge is anything like Sofar, they use MODBUS RTU wrapped in a proprietary packet, so it’s not even real MODBUS IP.
The makes me wonder how many other MODBUS devices do a similar thing.

Edwin_Biemond · February 8, 2023, 9:22am

for solaredge I need to know the ip and modbus id plus use this doc to find all the registers https://knowledge-center.solaredge.com/sites/kc/files/sunspec-implementation-technical-note.pdf

github.com

biemond/solaredge.modbus/blob/main/drivers/solaredge.ts#L12


      
          
          
export interface Measurement {
              value: string;
              scale: string;
              label: string;
          }
          
          
export class Solaredge extends Homey.Device {
          
          
    registers: Object = {
                  "c_manufacturer": [0x9c44, 16, 'STRING', "Manufacturer"],
                  "c_model": [0x9c54, 16, 'STRING', "Model"],
                  "c_version": [0x9c6c, 8, 'STRING', "Version"],
                  "c_serialnumber": [0x9c74, 16, 'STRING', "Serial"],
                  "c_deviceaddress": [0x9c84, 1, 'UINT16', "Modbus ID"],
                  "c_sunspec_did": [0x9c85, 1, 'UINT16', "SunSpec DID"],
          
          
        "current": [0x9c87, 1, 'UINT16', "Current"],
                  "l1_current": [0x9c88, 1, 'UINT16', "L1 Current"],
                  "l2_current": [0x9c89, 1, 'UINT16', "L2 Current"],
                  "l3_current": [0x9c8a, 1, 'UINT16', "L3 Current"],

then translate these register values back to float etc which is hard

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Modbus TCP add to Homey Pro

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