a wireless data logger for water quality

Using Arduino Project Guidance
1

This is probably an easy one, but I cannot seem to get a straight answer from Googling alone. I have a pH unit that measures and displays the pH via a hard wired connection, and can transmit the data to a laptop.

I would like to modify it so that the pH sensor, transmit data to the Arduino wirelessly. It seems that bluetooth 4 is a good low power option for this, but what hardware would I need on the pH meter end? Linked below (item 5) is an example of the meter and BNC connector we have currently. I'm assuming that I will need a transmitter to connect with the BNC adapter, and this would talk to the Bluetooth receiver on the Arduino end. I am considering a Bluetooth 4.0 chip or a nRF24 for sending the data, but want to make sure these are good options before investing the time/money.

Ultimately, we would be using several sensors. So any equipment or example code would eventually have to integrate into several feeds.

Current Supplies:

  1. EZO pH Circuit
  2. Arduino Mega 2560 R3
  3. Arduino WiFi Shield
  4. 5 volt power supply
  5. Gravity: Analog pH Sensor / Meter Kit for Arduino - DFRobot

Thanks for your time and expertise.

2

but what hardware would I need on the pH meter end?

An Arduino.

3

I'm assuming that I will need a transmitter to connect with the BNC adapter, and this would talk to the Bluetooth receiver on the Arduino end.

It is extremely unlikely that you will find a self contained transmitter module that can do that.

You will first need to digitize the data and send them out in some suitable format. An Arduino with a radio module would work.

4

erkvos:
what hardware would I need on the pH meter end?

Maybe an ESP 8266 that reads the pH sensor and send the data to laptop via WiFi, no Arduinos required anywhere. The ESP8266 is programmed like an Arduino and is made with this sort of thing in mind. Your real problem is one you probably haven't thought about - how you receive the data into the laptop. It's possible that you don't need to think about it, the software you are already using may suffice.