MODBUS RS485 Sensor read

[gumue]

I am not familiar with Modbus RTU / RS485, but I need to integrate a multi-parameter sensor in Node-Red flow that can be read out with Modbus RTU. In the supplied sensor software I can record a log of the communication via an RS485 USB adapter on the PC - it looks like this:

T→ 01 03 01 00 00 70 45 D2 length=8
R← 01 03 E0 AA 53 A1 41 FF FF FF FF 3F FF FF FF FF FF 3F 00 00 00 00 00 66 A6 CA 42 52 49 1D 3A 52 49 1D 3A 00 00 00 00 00 00 00 00 00 00 01 8B 79 44 55 55 D5 3F 4C 8C 3B 40 DE 3E 71 43 FB EF 83 43 40 75 8D 3F 93 9A 9B 3F FF FF FF FF 3F D2 44 FC 40 08 E0 AB 42 FF FF FF FF FF 3F FF FF FF FF FF FF 3F FF FF FF FF FF FF 3F FF FF FF FF FF FF 3F FF FF FF FF FF 3F FF FF FF FF FF 3F FF FF FF FF 3F FF FF FF FF 3F FF FF FF FF 3F FF FF FF FF FF 3F FF FF FF FF 3F 55 A4 04 3F FF FF FF FF FF FF 3F FF FF FF FF FF FF 3F FF FF FF FF FF FF 3F FF FF FF FF FF FF 3F FF FF FF FF FF FF 3F FF FF FF FF FF FF 3F FF FF FF FF FF FF 3F FF FF FF FF FF 3F FF FF FF FF 3F FF FF FF FF 3F FF FF FF FF 3F FF FF FF FF 3F FF FF FF FF 3F FF FF FF FF 3F FF FF FF FF 3F FF FF FF FF 3F FF FF FF FF 3F FF FF FF FF 3F C5 C2 length=229

Unfortunately, I don't understand how to read this data into individual values in Nodered - I hope you can help me here with an example flow, for example.
Thank you!

[Steve-Mcl]

Have you installed node-red-contrib-modbus?

Have you managed to communicate with the device?

What are you expecting the values to look like? (i.e. is there a document explaining what the values format are?)

---

NOTE:
That t → data means Transmit:
The data 01 03 01 00 00 70 45 is a Modbus packet and is decoded as:

Part of Data Package	Description	Value
01	Slave address	0x01 (1)
03	Function code	0x03 (3) - Read Holding Registers
01 00	Starting address	Physical: 0x0100 (256)
		Logical: 0x0101 (257)
00 70	Quantity	0x0070 (112)
45 D2	CRC	0x45D2 (17874)

See for your self: Online Modbus RTU Parser & Modbus TCP Parser