The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"name": "MQTT Topic Monitor",
"nodes": [
{
"parameters": {
"content": "## MQTT Topic Monitor",
"height": 520,
"width": 1100
},
"id": "5491692b-63b3-463e-982f-ac8b2af8888a",
"name": "Sticky",
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-500,
-250
]
},
{
"parameters": {
"httpMethod": "POST",
"path": "mqtt_topic_monitor"
},
"id": "67b89ca6-7381-4b63-be6a-a609764f40a8",
"name": "Webhook",
"type": "n8n-nodes-base.webhook",
"typeVersion": 1,
"position": [
-300,
0
]
},
{
"parameters": {
"chunkSize": 400,
"chunkOverlap": 40
},
"id": "642cab7e-89fd-484b-ba14-5a4955f68bad",
"name": "Splitter",
"type": "@n8n/n8n-nodes-langchain.textSplitterCharacterTextSplitter",
"typeVersion": 1,
"position": [
-100,
0
]
},
{
"parameters": {
"model": "default"
},
"id": "20d6b7c2-8757-4487-88a2-9192c863320c",
"name": "Embeddings",
"type": "@n8n/n8n-nodes-langchain.embeddingsOpenAi",
"typeVersion": 1,
"position": [
100,
0
],
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"mode": "insert",
"indexName": "mqtt_topic_monitor"
},
"id": "99a15bd4-8347-4415-9146-763365d9e53d",
"name": "Insert",
"type": "@n8n/n8n-nodes-langchain.vectorStoreRedis",
"typeVersion": 1,
"position": [
300,
0
],
"credentials": {
"redisApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"indexName": "mqtt_topic_monitor"
},
"id": "dd310d8e-19b5-46af-8fa4-80e08ba16414",
"name": "Query",
"type": "@n8n/n8n-nodes-langchain.vectorStoreRedis",
"typeVersion": 1,
"position": [
300,
-180
],
"credentials": {
"redisApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"name": "Redis"
},
"id": "ba010ae7-0e63-4b06-970a-838d7dc3b833",
"name": "Tool",
"type": "@n8n/n8n-nodes-langchain.toolVectorStore",
"typeVersion": 1,
"position": [
480,
-180
]
},
{
"parameters": {},
"id": "99da297c-57c7-469e-8c1a-2ef1c8e77464",
"name": "Memory",
"type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
"typeVersion": 1.3,
"position": [
480,
-40
]
},
{
"parameters": {},
"id": "e07b1578-30c7-41ca-9786-302b53b1da34",
"name": "Chat",
"type": "@n8n/n8n-nodes-langchain.lmChatHf",
"typeVersion": 1,
"position": [
480,
-340
],
"credentials": {
"huggingFaceApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"promptType": "define",
"text": "={{ $json }}"
},
"id": "d6ba7bb2-c36d-4087-a1a7-8557ce2cbd57",
"name": "Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"typeVersion": 1,
"position": [
760,
-40
]
},
{
"parameters": {
"operation": "append",
"documentId": "SHEET_ID",
"sheetName": "Log"
},
"id": "a3b5ecb2-5cdd-495c-bd3f-f8fa00d5c15a",
"name": "Sheet",
"type": "n8n-nodes-base.googleSheets",
"typeVersion": 4,
"position": [
960,
-40
],
"credentials": {
"googleSheetsOAuth2Api": {
"name": "<your credential>"
}
}
}
],
"connections": {
"Webhook": {
"main": [
[
{
"node": "Splitter",
"type": "main",
"index": 0
},
{
"node": "Memory",
"type": "main",
"index": 0
}
]
]
},
"Splitter": {
"main": [
[
{
"node": "Embeddings",
"type": "main",
"index": 0
}
]
],
"ai_textSplitter": [
[
{
"node": "Insert",
"type": "ai_textSplitter",
"index": 0
}
]
]
},
"Embeddings": {
"ai_embedding": [
[
{
"node": "Insert",
"type": "ai_embedding",
"index": 0
},
{
"node": "Query",
"type": "ai_embedding",
"index": 0
}
]
]
},
"Insert": {
"ai_document": [
[]
]
},
"Query": {
"ai_vectorStore": [
[
{
"node": "Tool",
"type": "ai_vectorStore",
"index": 0
}
]
]
},
"Tool": {
"ai_tool": [
[
{
"node": "Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"Memory": {
"ai_memory": [
[
{
"node": "Agent",
"type": "ai_memory",
"index": 0
}
]
]
},
"Chat": {
"ai_languageModel": [
[
{
"node": "Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Agent": {
"main": [
[
{
"node": "Sheet",
"type": "main",
"index": 0
}
]
]
}
},
"settings": {
"executionOrder": "v1"
}
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
googleSheetsOAuth2ApihuggingFaceApiopenAiApiredisApi
About this workflow
MQTT Topic Monitor. Uses stickyNote, textSplitterCharacterTextSplitter, embeddingsOpenAi, vectorStoreRedis. Webhook trigger; 11 nodes.
Source: https://github.com/Zie619/n8n-workflows — original creator credit. Request a take-down →