Ethernet Gateway + LCD issue

njh · 18 January 2024 10:03

I have just upgraded from WiFi Version 2.x (ESP8266) to an ESP32 based Ethernet Gateway v5.0.2. I am amazed by what a big improvement it is! Really impressive how good the UI looks

I had a slight problem while installing the board. I used Self Adhesive Velcro to stick it to the top of the enclosure - trying to keep it away from mains voltages:

However when I put the case back on, I think the LCD terminals were just touching the Ethernet socket and it went a bit crazy:

Thankfully no permanent damage. I have solved it by putting electrical tape on both the Ethernet socket and the back of the LCD panel.

But it is a bit of a squash getting the Ethernet Gateway board in there. Has anyone else experienced this?
Might be another reason to upgrade the enclosure.

PNT · 19 July 2025 17:52

what ESP32 board did you use there?

Thanks,
PNT

njh · 19 July 2025 20:00

It was the ‘official’ one from the OpenEnergyMonitor Shop.

I am fairly sure they were were reselling the Olimex ESP32-GATEWAY, pre-flashed and with a suitable cable.

glyn.hudson · 21 July 2025 12:03

That’s correct, here’s the documentation for it:

github.com/OpenEVSE/openevse_esp32_firmware

docs/wired-ethernet.md

master

# Wired Ethernet

Several boards are available with ethernet hardware, which can be used as drop-in replacements for ESP8266 / ESP32 WiFi modules and are compatible with all models of OpenEVSE / EmonEVSE.


The ESP32 Gateway (bare board) can be purchased from: https://www.olimex.com/Products/IoT/ESP32/ESP32-GATEWAY/open-source-hardware

It will need to be wired up as follows. 

![esp32-gateway-prewired](esp32-gateway-prewired.jpg)

Network connection can be made with a standard Ethernet cable. For new installations it may be worth considering a power cable with integrated data connections such as the [Doncaster EV-ultra cable](http://www.doncastercables.com/cables/17/77/EV-Ultra/Power-and-data-connectivity-combined-in-one-cable/). If using such a cable, extra work will be required to attach RJ45 connector or socket at each end.

## Hardware Connections

Wiring varies depending on the board in use, in particular [this git issue](https://github.com/OpenEVSE/ESP32_WiFi_V3.x/issues/12) discusses a wiring change between revisions of the ESP32-GATEWAY board.


| Signal     | EVSE wire   | ESP32-GATEWAY E & F | ESP32-GATEWAY pre-E | ESP32-PoE-ISO
| :--------- | :---------- | :------------------ | :------------------ | :------------

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