From a33ae3cc40a34c093b35038ae3f5c138522c7849 Mon Sep 17 00:00:00 2001
From: ako <arndt.kopp@web.de>
Date: Thu, 6 Feb 2020 22:45:39 +0100
Subject: [PATCH] PCF8574 - skip detection if i2c address is defined in
 USE_MCP230xx_ADDR Currently the PCF8574 address selection detects the
 MCP230xx which is using an address in the range 0x20 - 0x26. This fix skips
 the address defined in #define USE_MCP230xx_ADDR

---
 tasmota/xdrv_28_pcf8574.ino | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tasmota/xdrv_28_pcf8574.ino b/tasmota/xdrv_28_pcf8574.ino
index ecbde786c..26ae9f65a 100644
--- a/tasmota/xdrv_28_pcf8574.ino
+++ b/tasmota/xdrv_28_pcf8574.ino
@@ -93,6 +93,12 @@ void Pcf8574Init(void)
     }
 
     pcf8574_address++;
+#ifdef USE_MCP230xx_ADDR
+    if (USE_MCP230xx_ADDR == pcf8574_address) {
+      AddLog_P2(LOG_LEVEL_INFO, PSTR("PCF: Addr: 0x%x reserved for MCP320xx, skipping PCF8574 probe"), pcf8574_address);
+      pcf8574_address++;
+    }
+#endif
     if ((PCF8574_ADDR1 +7) == pcf8574_address) {  // Support I2C addresses 0x20 to 0x26 and 0x39 to 0x3F
       pcf8574_address = PCF8574_ADDR2 +1;
     }