Ed Comments - Answer Overflow

Tested it but doesn't work. Node generated: "put error 502 Did not receive change confirmation" Could be that the driver in VenusOS for the BMS doesn't accept set/put commands, only readable. Too bad.

17 replies

SKSignal K

•Created by Greg Young on 11/5/2024 in #plugins-and-webapps

Greg Young - teltonika plugin erroranyone els...

Never worked for me, but previously had a RUT950 and currently a RUTX50 so could not really blame the plugin. But with Node-Red and the modbus node it works fine.

23 replies

SKSignal K

•Created by Ed on 10/21/2024 in #node-red

Ed - When some new installed module's documenta...

Great! Will try Thursday. While at it, can you also add the same for “allow to discharge” as well?

17 replies

SKSignal K

•Created by Ed on 10/21/2024 in #node-red

Ed - When some new installed module's documenta...

The documentation states: set the environment variable NODE_RED_DBUS_ADDRESS to connect via TCP. The variable should be a string with an ip and port separated by a colon, e.g. export NODE_RED_DBUS_ADDRESS=192.168.1.1:78 and I did that in /etc/environments

17 replies

SKSignal K

•Created by Ed on 10/21/2024 in #node-red

Ed - When some new installed module's documenta...

And indeed @Scott Bender that enabled me to see a lot of new paths coming into Signal K. Nice. But how can I 'set' a value? For instance "electrical.batteries.house.bms.allowToCharge" has a value of "1" but how can I use Node-Red to send a "0"? I've tried to do this with the Victron palette "victronenergy/node-red-contrib-victron" but shows error: There are no battery monitor services available. Please check that a battery monitor is connected or try a different node. And it doesn't matter which node I choose; also fails for "relais" etc. I wondered how these nodes should know where to connect to... I've enabled dbus over tcp and do get data in whith "telnet ip.ip.ip.ip 78" so that part is fine. But I can't find or think of any config for the palette to know that address.

17 replies

SKSignal K

•Created by Ed on 10/21/2024 in #node-red

Ed - When some new installed module's documenta...

Ahhh, that looks promising! Will definitely check that out, will make it so much cleaner for doing what I have in mind. Thanks!

17 replies

SKSignal K

•Created by Ed on 10/21/2024 in #node-red

Ed - When some new installed module's documenta...

Not sure yet what I need. I’ve build a LiFePO4 battery with a JK BMS. There is a driver (open source) for VenusOS. I’m hoping to create some automation for this setup, like switching charger off if temp of alternator gets to high. Even create switches in KIP for it.

17 replies

SKSignal K

•Created by Ed on 10/21/2024 in #node-red

Ed - When some new installed module's documenta...

Thank you, but already tried that. Also restarted SK and started fresh browser-session after that. Might you want to try, it is module "victron-modbus" and the file it needs to fetch a list of attributes is "attributes.csv" from https://github.com/victronenergy/dbus_modbustcp/blob/master/attributes.csv

17 replies

SKSignal K

•Created by Tony on 9/7/2024 in #sensesp

Tony - Does anyone have sample code to sense vo...

Measure voltage, feed it to influx and make it visible with Grafana. It will show when and for how long on/off.

6 replies

SKSignal K

•Created by Andréas Schütz on 8/9/2024 in #questions

Hi all

My batteries are in the engine room so the BMV (smartshunt) is as well. Being a steel boat the bt connection is a bit flakey with the pi 4 meters away. I’ve connected a SensESP module for ve.connect to it. In the future I plan/hope to put another pi closer by running venusOS and hardwire the bus.

6 replies

SKSignal K

•Created by Blaise on 7/31/2024 in #questions

optocoupler question

Thanks for the reply but you've totally lost me. What do you mean with 'reverse voltage'? If the V+ goes to the "W" of the alternator and the V- to ground there is roughly 14 volt and current is limited by the resistor (14mA). I'm no pro though but would like to understand.

15 replies

SKSignal K

•Created by Blaise on 7/31/2024 in #questions

optocoupler question

@Blaise Will you be getting V+ from the "W" on the alternator? I'm curious because I'm looking into doing something like this myself.

15 replies

SKSignal K

•Created by Blaise on 7/31/2024 in #questions

optocoupler question

Doesn't the LED in V+ line already take care of reverse voltage protection? And if voltage is reversed it just wouldn't work anyway and no harm will be done (on a 12v system).

15 replies

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