Fluke 189 Multimeter - Web interface

Using the Fluke 189's built-in IR serial interface you can send and receive data. I didn't want to spend $60 on a fancy Fluke IR serial cable, so I thought why not make a WiFi interface!

Combine a phototransistor, and IR LED and a cheap (about $3) ESP8266 ESP-01 WiFi module and you can read the meter remotely from any web browser. Technically you can even control parts of the meter!

This was a fun project that I put way too much time into. The goal was to make it as cheaply as possible.

Arduino code provided for the ESP8266. If you have any questions, feel free to ask.

https://youtu.be/k6FPeUcDfpc


Full parts list:
toggle switch
10K ohm resistor
470 ohm resistor
IR LED
photo transistor
ESP8266 ESP-01
LM1117-3.3v regulator

Some notes:
You might have better results with a smaller resistor than 10K. I think I switched to a 4.7K.
The IR components I used are Cylewet CYT1057:
https://www.amazon.com/gp/product/B06VY25N8J/ref=ppx_yo_dt_b_search_asin_title?i