From dba12270e00880b79e613e78c1bdbc4a40254ae2 Mon Sep 17 00:00:00 2001
From: chenjinhuo <13926930429@139.com>
Date: Mon, 26 Aug 2024 09:25:19 +0800
Subject: [PATCH] enchance: Use `node.client.connectUDP` to support UDP type.

---
 src/modbus-client.html |  1 +
 src/modbus-client.js   | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/src/modbus-client.html b/src/modbus-client.html
index e6b2cf3b..a111d450 100644
--- a/src/modbus-client.html
+++ b/src/modbus-client.html
@@ -256,6 +256,7 @@
                         <option value="TCP-RTU-BUFFERED">RTU-BUFFERED</option>
                         <option value="TELNET">TELNET</option>
                         <option value="C701">C701</option>
+                        <option value="UDP">UDP</option>
                     </select>
                 </div>
             </div>
diff --git a/src/modbus-client.js b/src/modbus-client.js
index 6e15f96e..f030e357 100644
--- a/src/modbus-client.js
+++ b/src/modbus-client.js
@@ -372,6 +372,17 @@ module.exports = function (RED) {
                     return false
                   })
                 break
+              case 'UDP':
+                  verboseLog('UDP port')
+                  node.client.connectUDP(node.tcpHost, {
+                    port: node.tcpPort,
+                    autoOpen: true
+                  }).then(node.setTCPConnectionOptions)
+                    .catch((err) => {
+                      node.modbusTcpErrorHandling(err)
+                      return false
+                    })
+                  break
               default:
                 verboseLog('TCP port')
                 node.client.connectTCP(node.tcpHost, {