ESP 32 beta loss of WiFi connection

jeremypoulter · 11 May 2020 20:50

Correct @Bill_Burgess, what you uploaded is the RAPI comms between the EVSE and the WiFi module. There is a more human readable output on pin #1.

@Pukka Same SSID? At the high level it just connects to an SSID, but I am not sure what logic the lower levels use when selecting a particular AP.

FatJuan · 12 May 2020 11:29

I downloaded v3.1.0 dev and it seems stable.

Pukka · 13 May 2020 13:22

just to update this thread, I installed a new wifi access point about 2 foot away from the charger. It has not crashed yet. but then again i have not been charging the car via grid or solar. (no sun)

I will keep testing

Bill_Burgess · 14 May 2020 07:54

Well since the weekend both of my asp32 have kept working. Early to tell. But what I did was on my DCHP server set it to infinity lease time .
Not sure if this may cause me other issues
But thought I would try it as I am making an assumption that after a certain amount of time the esp 32 would be dropped from my system if lease time expired and it may not be reauthenticating it self . ??? Anyone can give more detail on how this works

Pukka · 14 May 2020 17:32

Intresting, more testing needed. I did have 10 minute lease time. now 30 min but the ESP32 has a reserved IP

glyn.hudson · 14 May 2020 23:53

Yes, it’s possible to use the ESP32 gateway. I’ve added this as an option in our web store. The board will come pre-configured with the correct hardware connections and firmware It’s a drop in replacement for the WiFi board.

Pukka · 15 May 2020 10:23

Going forward will the firmware be per complied on the download page or will I need to do it my self?

I will do some more testing with the wifi first and see if I can help with that.

Pukka · 15 May 2020 10:24

just as an update to this i have changed the DHCP lease back to 10 min and have an access point close the ESP32

glyn.hudson · 16 May 2020 00:51

Yes, the esp32-gateway-ethernet FW is now on the releases page. The full docs on how to connect and upload to the esp32-gateway-ethernet boards can be found here:

github.com

OpenEVSE/openevse_esp32_firmware/blob/master/docs/wired-ethernet.md

# 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.


See [OpenEnergyMonitor web-store to purchase a pre-wired ESP32-Gateway module](https://shop.openenergymonitor.com/openevse-etherent-gateway-esp32/). The Ethernet gateway in our web-store will come with pre-wired power supply, serial connections, and pre-loaded with firmware for drop in replacement.

![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
| :--------- | :---------- | :------------------ | :------------------ | :------------
| 5V         | Red wire    | 20                  | 20                  | N/C (powered over Ethernet)
| GND        | Black wire  | 19                  | 19                  | GND

This file has been truncated. show original

I’ve created a new thread for wired Ethernet related discussion:

Pukka · 20 May 2020 18:13

Just to update this, I have had the DHCP lease time set to 10 min and a WIFI access point near the ESP32 and its been 5 days and no loss of network. on friday i will remove the access point and report back.

Pukka · 23 May 2020 16:55

So today I removed the unifi Access Point and 3 hours later we have lost the web interface. its now broadcasting it own OpenEVSE_7b
WhenI looked about an hour ago the signal was -88 but interestingly our emonESP is showing signal as -91 and its still connected.

I would say it is signal based problem

Bill_Burgess · 25 May 2020 18:12

hi since i changed the lease time on my dchp server to infinit the esp32 has worked with out interuption for over a week now thet is charging every night …

i think that it is some thing when trying to reconect to the sysem . that is causing issue .
i am using a pi hole dchp server on my system .