I am working on a project that uses arduino mega and ethernet shield mounted ontop of it,
arduino mga is further connected to following sensors:
- Soil moisture sensor,
- Water level sensor,
- DS18b20 temperature sensor
- LDR light sensor,
5, Rain sensoor
the soil moisture sensor detects soil drynes or damp, of soil is dry it turns on solenoid.
so earlier my around mega was placed outsude and wire length was not so much, now I have decided to put ardiono inside the house and take six wires from my mega kept in room to outside corridor near pot, for that I bout 4mtr length wire, and 1 mtr more for soil moisture, water level, LDR and Rain fall sensors ontop of 4mtr it becomes 5+ mtr wire, so today evening I decided to measure resistance coming from total wire length which turns out to 2.9 - 3.0 with on my digital multimeter 200Ohm . See attached picture, so I would assume the reading on digital multimeter is multiple of 200ohm which becomes 600 ohm.
so the question is , Is it negligible for all the sensors listed above? or
do I have to put some boost on the side of sensors so to compensate power loss due to resistance ?
I am not experienced this is the first arduino project I am doing combining all the tries I did for learning .