the thing you are looking for is type "editMessageText"
The documentation is out there but not in a ready made "how to" for node red nodes I'm afraid.
Using telegram documentation and looking at the source code for this node-red node I cobbled together a basic demo...
- In your telegram app, send
/serverstatus to begin receiving messages.
- press the injects to fake server status changes - watch the message update
- send
/stop to clear the chat_id/message_id stored and prevent new updates being sent to telegram.
The message you get is just raw JSON (I'll leave that for you to tidy up)
Here is the flow...
[{"id":"73a7f6b4.fecb78","type":"telegram command","z":"5d3f964c.fef898","name":"/serverstatus","command":"/serverstatus","bot":"fa7a9376.321ce","strict":false,"hasresponse":false,"x":170,"y":1620,"wires":[["2759079.cd0e4f8","e6e3f9e3.9f4b68"]]},{"id":"db357bb6.47cc98","type":"telegram command","z":"5d3f964c.fef898","name":"/stop","command":"/stop","bot":"fa7a9376.321ce","strict":false,"hasresponse":false,"x":150,"y":1740,"wires":[["ef443902.89a8c8","3d8cc89b.0ce768"]]},{"id":"2759079.cd0e4f8","type":"debug","z":"5d3f964c.fef898","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":330,"y":1660,"wires":[]},{"id":"ef443902.89a8c8","type":"debug","z":"5d3f964c.fef898","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":330,"y":1780,"wires":[]},{"id":"e6e3f9e3.9f4b68","type":"change","z":"5d3f964c.fef898","name":"save chat_id","rules":[{"t":"set","p":"chat_id","pt":"flow","to":"payload.chatId","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":350,"y":1620,"wires":[["2978358b.f28f4a"]]},{"id":"3d8cc89b.0ce768","type":"change","z":"5d3f964c.fef898","name":"clear chat_id","rules":[{"t":"delete","p":"chat_id","pt":"flow"}],"action":"","property":"","from":"","to":"","reg":false,"x":350,"y":1740,"wires":[["5121be07.154ef"]]},{"id":"5121be07.154ef","type":"change","z":"5d3f964c.fef898","name":"delete message_id","rules":[{"t":"delete","p":"message_id","pt":"flow"}],"action":"","property":"","from":"","to":"","reg":false,"x":530,"y":1740,"wires":[[]]},{"id":"e49f0f49.68edf","type":"change","z":"5d3f964c.fef898","name":"save message_id","rules":[{"t":"set","p":"message_id","pt":"flow","to":"payload.content.message_id","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":970,"y":1660,"wires":[[]]},{"id":"54b22eed.24e99","type":"telegram sender","z":"5d3f964c.fef898","name":"","bot":"fa7a9376.321ce","x":850,"y":1620,"wires":[["e49f0f49.68edf"]]},{"id":"e90adeb2.66434","type":"inject","z":"5d3f964c.fef898","name":"","topic":"server/1/status","payload":"up","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":210,"y":1840,"wires":[["3e9729fc.44be86"]]},{"id":"39f7c105.cbaade","type":"inject","z":"5d3f964c.fef898","name":"","topic":"server/1/status","payload":"down","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":210,"y":1880,"wires":[["3e9729fc.44be86"]]},{"id":"83b303bf.feed4","type":"inject","z":"5d3f964c.fef898","name":"","topic":"server/2/status","payload":"up","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":210,"y":1920,"wires":[["3e9729fc.44be86"]]},{"id":"e11a90b6.db038","type":"inject","z":"5d3f964c.fef898","name":"","topic":"server/2/status","payload":"down","payloadType":"str","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":210,"y":1960,"wires":[["3e9729fc.44be86"]]},{"id":"3e9729fc.44be86","type":"function","z":"5d3f964c.fef898","name":"save server status","func":"var server_status = flow.get(\"server_status\") || {};\nserver_status[msg.topic] = msg.payload;\nflow.set(\"server_status\", server_status) \nreturn msg;","outputs":1,"noerr":0,"x":450,"y":1900,"wires":[["41fa2e6a.95e93"]],"info":"## New message\n\nHello *markdown* formatted messages!'\n\nwith `inline` code\n\n> and quote\n>> nested\n\n\\`\\`\\`\nvar code = \"cool\";\n\\`\\`\\`\n\n| table | data |\n|---|---|\n| 1 | fred |\n| 2 | bob |\n\n_Italic_ **bold** "},{"id":"41fa2e6a.95e93","type":"switch","z":"5d3f964c.fef898","name":"chat_id exists?","property":"chat_id","propertyType":"flow","rules":[{"t":"nnull"}],"checkall":"true","repair":false,"outputs":1,"x":660,"y":1900,"wires":[["2e44ed20.a2f0c2"]]},{"id":"2e44ed20.a2f0c2","type":"switch","z":"5d3f964c.fef898","name":"message_id exists?","property":"message_id","propertyType":"flow","rules":[{"t":"nnull"}],"checkall":"true","repair":false,"outputs":1,"x":870,"y":1900,"wires":[["43757dc6.981834"]]},{"id":"2978358b.f28f4a","type":"function","z":"5d3f964c.fef898","name":"build server status message","func":"var server_status = flow.get(\"server_status\") || {};\nvar stat = JSON.stringify(server_status);\n\nmsg.payload.content = stat;\nmsg.payload.type = \"message\";\n\n\nreturn msg;","outputs":1,"noerr":0,"x":580,"y":1620,"wires":[["54b22eed.24e99"]],"info":"## New message\n\nHello *markdown* formatted messages!'\n\nwith `inline` code\n\n> and quote\n>> nested\n\n\\`\\`\\`\nvar code = \"cool\";\n\\`\\`\\`\n\n| table | data |\n|---|---|\n| 1 | fred |\n| 2 | bob |\n\n_Italic_ **bold** "},{"id":"43757dc6.981834","type":"function","z":"5d3f964c.fef898","name":"build server status update message","func":"var server_status = flow.get(\"server_status\") || {};\nvar stat = JSON.stringify(server_status);\n\nvar mid = flow.get(\"message_id\");\nvar cid = flow.get(\"chat_id\");\n\nmsg.payload = {};\nmsg.payload.content = stat;\nmsg.payload.type = \"editMessageText\";\nmsg.payload.chatId = cid;\n\nmsg.payload.options = {\n message_id : mid,\n chat_id: cid\n}\n\nreturn msg;","outputs":1,"noerr":0,"x":920,"y":1860,"wires":[["54b22eed.24e99","c31dea56.509f38"]],"info":"## New message\n\nHello *markdown* formatted messages!'\n\nwith `inline` code\n\n> and quote\n>> nested\n\n\\`\\`\\`\nvar code = \"cool\";\n\\`\\`\\`\n\n| table | data |\n|---|---|\n| 1 | fred |\n| 2 | bob |\n\n_Italic_ **bold** "},{"id":"c31dea56.509f38","type":"debug","z":"5d3f964c.fef898","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","x":870,"y":1800,"wires":[]},{"id":"79f57d65.851a84","type":"comment","z":"5d3f964c.fef898","name":"Send /serverstatus to register you interest in server status updates","info":"","x":340,"y":1580,"wires":[]},{"id":"7e79d1a4.00a12","type":"comment","z":"5d3f964c.fef898","name":"Send /stop to cancel server status updates","info":"","x":260,"y":1700,"wires":[]},{"id":"fa7a9376.321ce","type":"telegram bot","z":"5d3f964c.fef898","botname":"mybot","usernames":"","chatids":"","baseapiurl":"","updatemode":"polling","pollinterval":"","usesocks":false,"sockshost":"","socksport":"","socksusername":"","sockspassword":"","bothost":"","localbotport":"","publicbotport":"","privatekey":"","certificate":"","useselfsignedcertificate":false,"sslterminated":false,"verboselogging":false}]
