Display values from sensors connected via Modbus

[artm04]

Hello, I ask for your help in writing a sketch using your ModbusMaster library to display temperature and humidity values in the Serial port monitor. [Arduino IDE version: 1.8.8] [Board: Arduino Nano]

Scheme: Module settings:

Module polling:

log_report 15:17:36-> 15:17 :: [ 01 04 00 00 00 08 F1 CC ]; [ 01 04 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 2C ]; [ 46 ms]==>OK 15:17:36-> 15:17 :: [ 01 04 00 00 00 01 31 CA ]; [ 01 04 02 00 00 B9 30 ]; [ 47 ms]==>OK 15:17:36-> 15:17 :: [ 01 04 00 01 00 01 60 0A ]; [ 01 04 02 00 00 B9 30 ]; [ 31 ms]==>OK 15:17:36-> 15:17 :: [ 01 04 00 02 00 01 90 0A ]; [ 01 04 02 00 00 B9 30 ]; [ 47 ms]==>OK 15:17:36-> 15:17 :: [ 01 04 00 03 00 01 C1 CA ]; [ 01 04 02 00 00 B9 30 ]; [ 32 ms]==>OK 15:17:36-> 15:17 :: [ 01 04 00 04 00 01 70 0B ]; [ 01 04 02 00 00 B9 30 ]; [ 31 ms]==>OK 15:17:36-> 15:17 :: [ 01 04 00 05 00 01 21 CB ]; [ 01 04 02 00 00 B9 30 ]; [ 47 ms]==>OK 15:17:36-> 15:17 :: [ 01 04 00 06 00 01 D1 CB ]; [ 01 04 02 00 00 B9 30 ]; [ 47 ms]==>OK 15:17:36-> 15:17 :: [ 01 04 00 07 00 01 80 0B ]; [ 01 04 02 00 00 B9 30 ]; [ 31 ms]==>OK

I-7017, I-7018, I-7019, M-7017, M-7018, M-7019 User Manual Modbus Register Map

Sketch( https://pastebin.com/VZvcTkBW ):

1.	#include <ModbusMaster.h>

2.	#define MAX485_DE      3
3.	#define MAX485_RE_NEG  2

4.	ModbusMaster node;

5.	void preTransmission()
6.	{
7.	digitalWrite(MAX485_RE_NEG, 1);
8.	digitalWrite(MAX485_DE, 1);
9.	}

10.	void postTransmission()
11.	{
12.	digitalWrite(MAX485_RE_NEG, 0);
13.	digitalWrite(MAX485_DE, 0);
14.	}

15.	void setup()
16.	{
17.	pinMode(MAX485_RE_NEG, OUTPUT);
18.	pinMode(MAX485_DE, OUTPUT);
19.	digitalWrite(MAX485_RE_NEG, 0);
20.	digitalWrite(MAX485_DE, 0);

21.	Serial.begin(19200);

22.	node.begin(1, Serial);
23.	node.preTransmission(preTransmission);
24.	node.postTransmission(postTransmission);
25.	}

26.	bool state = true;

27.	void loop()
28.	{
29.	uint8_t result;
30.	uint16_t data[6];

31.	result = node.readInputRegisters(0x40001, 8);
32.	if (result == node.ku8MBSuccess)
33.	{
34       //Here I need to display the values of 8 registers.
40.	}

41.	delay(1000);
42.	}

How in line 34 to get and display the values of all 8 registers?

[Stigtronix]

Looks like you are intending to start at decimal register 40001. But this line .....node.readInputRegisters(0x40001, 8); is looking for hex 40001. Which is Dec 262145!! Try removing the 0x.