Humidity and temperature sensor

Using Arduino Sensors
1

Pls tell me!... how i will to connect humidity and temperature sensor to arduino at 100 meters that would receive accurate information?...

2

Use one arduino at the sensor and another arduino 100m away. Connect the arduinos with wires or wirelessly.

If wired, use RS485.

If wireless, there are many alternatives.

3

which I need to connect three sensors wireless and display the results?...

4

Get one sensor Arduino and one receiver Arduino working first, before worrying about how to connect three of them.

5

but is it possible?

6

Yes, it is possible.

7

And i can to control 3 reley with ?

8

With what? The more detail that you provide, the quicker and more informative the answers.

9

Arduinos and NodeMCU and similar boards can control relays just fine.

Did you even try looking up anything yourself about this?

10

I want to build a greenhouse at home size:60X20...and I want to gather a block management on Arduino...want to take temperature and humidity indication from three points, and based on these readings that automatically joined 3 group fan independently of each other... somebody tell me what and how many pieces I will need?!...may be someone has finished sketch or help me understand where should I start... and including, I wonder the relationship between device was using RS-485... Thank you in advance

11

wvmarle:
Arduinos and NodeMCU and similar boards can control relays just fine.

Did you even try looking up anything yourself about this?

can you help me?

12

irakli-kv:
can you help me?

Of course.
There are basically two ways.

  1. you can do your homework, and come here with specific questions about what you have and where you get stuck, and I and other regular contributors will have a look and see what's going on, and give ideas on how to continue.

  2. you can ask someone to build it for you, for a suitable monetary compensation.

13

Just 100m of power/signal wire costs more than most wireless links. This strongly suggests
using some wireless method (unless you have to run power wiring anyway).

100m of power wiring pretty much requires higher voltages than 5V, so something like PoE
which uses 48V or so, is one way to power over long wires without mains. And CAT5 cable is
pretty economic as cabling goes.

14

MarkT:
Just 100m of power/signal wire costs more than most wireless links. This strongly suggests
using some wireless method (unless you have to run power wiring anyway).

100m of power wiring pretty much requires higher voltages than 5V, so something like PoE
which uses 48V or so, is one way to power over long wires without mains. And CAT5 cable is
pretty economic as cabling goes.

i have TTL rs485 module , aduino uno, DTH-22, lcd1602 keypad shield