4-20mA Current Loop to Bluetooth Project.

Projects General Guidance
1

Hello!

I'm new to this and not quite sure how to proceed.

I'm looking to connect an analogue moisture sensor running off a 4-20mA current loop to my android tablet via some sort of Bluetooth setup for monitoring.

I'd like to keep this project as simples possible as I don't know much about Bluetooth or app building.

I've looked around the internet at different circuit boards with Bluetooth from Arduino and a few others but they seem pretty advanced for my needs.

Does anyone have a simple, cheap, low power solution?

Also, once connected via blue tooth how do I display the meter readings on my tablet, do I have to get into coding or is there an app that can do this for me?

Thanks.

Brian

2

The Arduino way:
You need a 4-20mA to 0-5V conversion (a simple resistor works fine), then an Arduino can read the signal and produce a number.
You have to find a way to connect this Arduino to your tablet - e.g. a Bluetooth adapter, or through a WiFi link.
Then you have to get yourself an app on that tablet that can read and display this data.

I'm not aware of any more direct ways - i.e. ready made hardware that allows a tablet to directly read some 4-20mA signal.