The UNI-T UT61E multimeter has an opto-isolated output port that streams data, including the currently selected range and reading.
This project is a WiFi adapter that attaches to the output port and reports the data via WiFi or USB.
The example firmware reads the data packet from the multimeter and publishes it to an MQTT broker, and also outputs it via the USB port at 115200bps.
NOTE: The Rx data pin has been changed from D0 (GPIO16) in the v1.0 design to D5 (GPIO14) in v1.1. Photos show a v1.0 PCB that has been patched to the new Rx data pin.
More details:
http://www.superhouse.tv/ut61ewifi
The "Hardware" directory contains the PCB design as an EAGLE project. EAGLE PCB design software is available from Autodesk free for non-commercial use.
The "Firmware" directory contains example firmware as an Arduino project.
The Wemos D1 Mini used in the adapter has an Espressif ESP8266 MCU. This is not supported by default by the Arduino IDE, so the first step is to install a board profile to suit.
Full steps are explained here:
https://randomnerdtutorials.com/how-to-install-esp8266-board-arduino-ide/
Then select:
Tools -> Board -> ESP8266 Boards -> "WEMOS(LOLIN) D1 Mini (clone)".
Other ESP8266 board profiles may also work, depending on the specific D1 mini that you use.
Two libraries are also required. Install using the Arduino library manager:
- "PubSubClient" by Nick O'Leary
- "NeoPixel" by Adafruit
- Jonathan Oxer jon@oxer.com.au
- CableTie https://github.com/cabletie
- Aaron Knox aaron@makerdock.io
Copyright 2021 SuperHouse Automation Pty Ltd www.superhouse.tv
The hardware portion of this project is licensed under the TAPR Open Hardware License (www.tapr.org/OHL). The "license" folder within this repository contains a copy of this license in plain text format.
The software portion of this project is licensed under the Simplified BSD License. The "licence" folder within this project contains a copy of this license in plain text format.
The UNI-T logo is the trademark of Uni-Trend Technology (China) Co., Ltd.