eNode

UPDATE

checkout new PCB to facilitate building the eNode here

Table of Contents

Intro
Hardware
Software
Measure Direction Hack
Build Examples

Intro

eNode is a device based on ESP8266 and PZEM-004 that measures energy and/or temperature and delivers data to a MQTT broker and/or Emoncms. eNode is modular meaning you can start with a simple energy module a go up to a true 3-phase energy monitoring system, along with temperature detecton of up to 10 digital temperature sensors. Data is delivered through WiFi and configuration is done in it's own web page.

Energy meter:

Based on cheap Peacefair PZEM-004
Very accurate readings
Energy direction possible with chip hack on first PZEM-004
up to 3 independent PZEM-004 per device
Volt, Ampere, RealPower

Temperature meter:

Based on cheap 1-wire DS18B20
up to 10 DSB20 digital 1-wire temperature sensors
Device addresses managed on the setup page

Relay:

MQTT controlled relay

ESP8266:

Easily configurable from web page
Delivers JSON formatted data to local/remote MQTT broker
Delivers data to local/remote Emoncms server
change refresh rate on demand

Hardware

Qty	Item	Function
1	wemos D1 mini	`node`
1	PSU 230VAC to 5VDC	`node`
1	DC/DC 5V to 3.3VDC	`node`
3	PZEM-004	`Energy`
3	R=510OHM	`Energy`
10	DS18B20	`Temperature`
1	R=4.7K OHM	`Temperature`
1	D1 relay shield	`Relay`

PCB

This is the first attempt to play with eagle, it's no perfect but makes the bulding of the eNode a breeze compared to what can be seen on the build examples. I can give away these boards for a simbolic fee, with or without the smd parts.

The PCB facilitates connections to all three PZEMs, relay and temperature sensor network and makes the direction hack easier to achieve, only 2 wires are needed from the PZEM board.