From ffd533815032f4b8e7f960ed6b22c1806a6b0e4d Mon Sep 17 00:00:00 2001
From: gururise <gururise@gmail.com>
Date: Wed, 8 Apr 2020 10:22:32 -0700
Subject: [PATCH] PMS5003 RX TX pin handling in PmsInit

---
 tasmota/xsns_18_pms5003.ino | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/tasmota/xsns_18_pms5003.ino b/tasmota/xsns_18_pms5003.ino
index 0909921dc..2f02ff454 100644
--- a/tasmota/xsns_18_pms5003.ino
+++ b/tasmota/xsns_18_pms5003.ino
@@ -140,13 +140,26 @@ void PmsSecond(void)                 // Every second
 void PmsInit(void)
 {
   pms_type = 0;
-  if (pin[GPIO_PMS5003] < 99) {
-    PmsSerial = new TasmotaSerial(pin[GPIO_PMS5003], -1, 1);
+  if ((pin[GPIO_PMS5003_RX] < 99) && (pin[GPIO_PMS5003_TX] < 99))
+  {
+    PmsSerial = new TasmotaSerial(pin[GPIO_PMS5003_RX], pin[GPIO_PMS5003_TX], 1);
     if (PmsSerial->begin(9600)) {
       if (PmsSerial->hardwareSerial()) { ClaimSerial(); }
       pms_type = 1;
     }
   }
+  else if ((pin[GPIO_PMS5003_RX] < 99))
+  {
+    PmsSerial = new TasmotaSerial(pin[GPIO_PMS5003_RX], -1, 1);
+    if (PmsSerial->begin(9600))
+    {
+      if (PmsSerial->hardwareSerial())
+      {
+        ClaimSerial();
+      }
+      pms_type = 1;
+    }
+  }
 }
 
 #ifdef USE_WEBSERVER