@laowang_shanxi/node-red-contrib-udp-request 0.1.1
UDP?Request node for Node?RED, send UDP datagram and wait for reply with single output
@laowang_shanxi/node-red-contrib-udp-request
Node-RED UDP-Request node. Send UDP datagram and wait for reply, single output port.
Features
- Send UDP packets, wait for remote response
- Auto‑convert
string / number / booleanto UTF‑8 bytes - Pass‑through raw binary Buffer without modification
- Single output with unified status field
- Status codes:
ok,timeout,param_error,socket_error,send_error
Install
Via Node-RED Palette Manager
Search: @laowang_shanxi/node-red-contrib-udp-request
Via command line
cd ~/.node-red
npm install @laowang_shanxi/node-red-contrib-udp-request
Input Message Properties
| Property | Type | Description |
|---|---|---|
msg.ip |
string | Target host IP, overrides node Host setting |
msg.port |
number | Target UDP port, overrides node Port setting |
msg.payload |
string | number | boolean | Buffer |
Data to send. Buffer will be sent as raw binary. |
msg.timeout |
number | Timeout in milliseconds, overrides node timeout |
Output Message Properties
| Property | Type | Description |
|---|---|---|
payload |
Buffer | null |
Raw reply Buffer on success; null when timeout or error |
udp_status |
string | ok / timeout / param_error / socket_error / send_error |
response |
string | null |
UTF‑8 decoded reply. If decode fails: decode_fail:hex_string. null for errors. |
rinfo |
object | Remote peer address info, only present when udp_status === "ok" |
error |
string | Human‑readable error text, only present on error conditions |
Important Notes
- Plain JavaScript array
[0x01,0x02]is NOT a Buffer. For binary frames use:Buffer.from([0x01, 0x02]). - Node only uses Node.js built‑in
dgram, no extra dependencies.
Compatibility
- Node.js >=14
- Node-RED >=2.0
License
MIT
