I'm new to electronics and IOT. I have a small project for a plant monitoring and automation system using esp32 and it involves many sensors such as soil moisture sensor, dht22 etc.
One feature that i wanted to add is a soil ph monitoring system. I'm looking at different sensors online and i found this one https://s.lazada.com.ph/s.RME5P
It has 2 listings of a soil pH Sensor. One with a 0-5V output and a 4-20mA output. What is the difference of the 2 and what should i buy?
One feature that i wanted to add is a soil ph monitoring system. I'm looking at different sensors online and i found this one https://s.lazada.com.ph/s.RME5P
It has 2 listings of a soil pH Sensor. One with a 0-5V output and a 4-20mA output. What is the difference of the 2 and what should i buy?