Shellyplus1 (gen2) Nodered to MQTT

[Japie.G]

Hello!

I am trying to switch the relay of a shellyplus-1 on and off using an MQTT message from nodered. With Gen1 shelly devices this was easy. I don’t know what i am doing wrong now. Without posting what i already tried i want to ask if somebody has a working example for switching the relay of the gen2 shelly device using mqtt. I am very interested in what message you send to which topic.

Thanks in advance!

[E1cid]

You offer no info to help you.

You can find the topics and info here

RPC Channels | Shelly Technical Documentation

and overview of rpc

RPC Protocol | Shelly Technical Documentation

[Japie.G]

Thanks! Yes i am aware of that info but for some reason i can’t get it to work. Thats why i hoped somebody has a working example of how the info from the shelly documentation is used within nodered.

[E1cid]

I do not have any gen2 devices. But what have you tried?
As far as i can make out you send

{"id":123, "src":"user_1", "method":"Switch.Set", "params":{"id":0,"on":true}}

to topic shelly_id/rpc

• id : number/string, identifier of this request, will be used to match the response frame. Required
• src : string, name of the source of the request (you can choose whatever string you like to identify you as the source of the request). Required
• method : string, name of the procedure to be called. Required
• params : JSON object, parameters that the method takes (if any) Optional

[deputynl]

Hi, I have integrated it with Domoticz. The below bit, received a device when it was updated and when it was a new shelly (magic done elsewhere in my flow). It takes that and creates a packet to be sent over MQTT. It depends on you setting the mqtt topic to a matching value as used in this bit of the flow of course. I hope this helps you get started.

[{"id":"13d61c25d6ee165f","type":"switch","z":"68000b40.442d94","name":"shelliesnew","property":"device.HardwareName","propertyType":"msg","rules":[{"t":"eq","v":"ShelliesNew","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":630,"y":400,"wires":[["87b904e5bfba1bfd"]]},{"id":"0313839891922c8f","type":"switch","z":"68000b40.442d94","name":"on/off","property":"device.Status","propertyType":"msg","rules":[{"t":"eq","v":"On","vt":"str"},{"t":"eq","v":"Off","vt":"str"}],"checkall":"true","repair":false,"outputs":2,"x":890,"y":400,"wires":[["b4647653e2f6b2a8"],["16c0e772f4ab74e2"]],"outputLabels":["on","off"]},{"id":"b4647653e2f6b2a8","type":"change","z":"68000b40.442d94","name":"On","rules":[{"t":"set","p":"payload","pt":"msg","to":"{\"id\":123,\"src\":\"/shelliesplus/responses\",\"method\":\"Switch.Set\",\"params\":{\"id\":0,\"on\":true}}","tot":"json"}],"action":"","property":"","from":"","to":"","reg":false,"x":1010,"y":390,"wires":[["dcbf6a94c241e495"]]},{"id":"16c0e772f4ab74e2","type":"change","z":"68000b40.442d94","name":"Off","rules":[{"t":"set","p":"payload","pt":"msg","to":"{\"id\":123,\"src\":\"/shelliesplus/responses\",\"method\":\"Switch.Set\",\"params\":{\"id\":0,\"on\":false}}","tot":"json"}],"action":"","property":"","from":"","to":"","reg":false,"x":1010,"y":420,"wires":[["dcbf6a94c241e495"]]},{"id":"dcbf6a94c241e495","type":"mqtt out","z":"68000b40.442d94","name":"","topic":"","qos":"","retain":"","respTopic":"","contentType":"","userProps":"","correl":"","expiry":"","broker":"6f3b55a4.3a524c","x":1190,"y":400,"wires":[]},{"id":"87b904e5bfba1bfd","type":"string","z":"68000b40.442d94","name":"topic","methods":[{"name":"append","params":[{"type":"str","value":"/shelliesplus/shellyplus1-"}]},{"name":"append","params":[{"type":"msg","value":"device.Name"}]},{"name":"append","params":[{"type":"str","value":"/rpc"}]}],"prop":"","propout":"topic","object":"str","objectout":"msg","x":770,"y":400,"wires":[["0313839891922c8f"]]},{"id":"6f3b55a4.3a524c","type":"mqtt-broker","name":"Mosquitto","broker":"mosquitto","port":"1883","clientid":"","usetls":false,"compatmode":false,"protocolVersion":"4","keepalive":"60","cleansession":true,"birthTopic":"","birthQos":"0","birthPayload":"","birthMsg":{},"closeTopic":"","closeQos":"0","closePayload":"","closeMsg":{},"willTopic":"","willQos":"0","willPayload":"","willMsg":{},"sessionExpiry":""}]

[Japie.G]

Thanks so much for your effort. I think I overlook something.I think I do exactly what the API wants me to do. I watched the flow above and tried to alter some things but nothing changes.

I just made a simple inject node and I hook that up to a MQTT out node. My inject node looks like this:

[{"id":"f6ee0c7b.18c73","type":"inject","z":"d8a5ec23.77e018","name":"on","props":[{"p":"topic","vt":"str"},{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"shellies/shellyplus1-441793a3acb0/rpc","payload":"{\"id\":123,\"src\":\"/shellyplus1-441793a3acb0/rpc\",\"method\":\"Switch.Set\",\"params\":{\"id\":0,\"on\":true}}","payloadType":"json","x":90,"y":80,"wires":[["bc861e3.ae07ae"]]}]

My shelly id name is shellyplus1-441793a3acb0

What am I doing wrong. I am a beginner, so it will be something stupid I think, but with the Gen1 there was no problem

When I send the json via MQTT to the shelly I get it back as a plain response..

[E1cid]

From the image your topic is ending rpc/, try removing the last /.

[Japie.G]

Already tried all combinations with slashes, no slashes, /rpc or events/rpc

no succes

[E1cid]

Can we see the mqtt config page of the shelly 1?

also set an mqtt in node to topic #, and then manually switch the shelly, what topic and payload do you see?

Or install mqtt explorer

[Japie.G]

I found the solution!

I did not need to use shellies/ in front of the topic Now it all works as expected. Wow!

Thanks for your help, already thought it was something stupid..

[E1cid]

you mean the solution i gave you in post 4.

[Japie.G]

Yes thank you so much. I overlooked it. Stupid me

Sometimes you get so blinded by a stupid mistake you just don't see it.