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SmartEVSE / SmartEVSE-3

Smart Electric Vehicle Charging Station (EVSE)
MIT License
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Question related modbus/p1 and hardwiring #38

Closed nekocentral closed 5 months ago

nekocentral commented 1 year ago

Currently i'm using a E20 p1 from zuidewijk. Currently i'm planning getting ethernet wired to the garage as i don't have wifi there. I'm wondering if there is a way to hardwire evse. if that is not possible, i wonder if i can get the P1 data to it without a sensor box mabye a hardwired esp or arduino to modbus. Do you have any tips on doing that or hints on what to use?

nekocentral commented 1 year ago

Else, i know it can speak to modbus energy meters, can i use it with a Shelly Pro 3EM?

mstegen commented 1 year ago

It's not possible to connect ethernet directly to the SmartEVSE. It does have a wired RS485 port, and Wifi. But if you are planning on getting wired ethernet to the garage, why not add another ethernet cable, and use that as RS485 bus?

The SmartEVSE will also work with other modbus energy meters. Alternatively you can install the Sekri fork. That has support for other ways to get the P1 data to the SmartEVSE.

Elektrofix-OL commented 1 year ago

Can the SmartEVSE V3 be made to read the Modbus TCP from a meter over WiFi? I'm thinking of connecting the EVSE to a Sunny Homemanager 2.0 to charge excess PV.

mstegen commented 1 year ago

This is currently not possible. The Serkri fork (https://github.com/serkri/SmartEVSE-3) has support for Modbus TCP, but as far as i know only to read/write the controllers modbus registers.

dingo35 commented 5 months ago

The modbus TCP bridge had to be removed because it disturbed the "regular" traffic on the modbus. We will look into making more registers of the MainsMeter and the EVMeter available, if it is possible without bandwidth problems. For other devices (that are not SmartEVSE related, like Solar/PV Meters or other stuff), we recommend you operate them on a separate modbus with a USB<->RS485 adapter, so your Domotica software can be the "master" of those devices.