From be46611f57592cceff526a8e7bc990454a5e97f1 Mon Sep 17 00:00:00 2001
From: Theo Arends <11044339+arendst@users.noreply.github.com>
Date: Fri, 19 Mar 2021 10:44:47 +0100
Subject: [PATCH] Increase SR04 max sensor detection distance

Increase SR04 max sensor detection distance to 500 (#11372)
---
 tasmota/my_user_config.h | 1 +
 tasmota/xsns_22_sr04.ino | 8 ++++++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/tasmota/my_user_config.h b/tasmota/my_user_config.h
index 3943ab4db..2df867689 100644
--- a/tasmota/my_user_config.h
+++ b/tasmota/my_user_config.h
@@ -673,6 +673,7 @@
   #define STARTING_OFFSET      30                // Turn on NovaSDS XX-seconds before tele_period is reached
 //#define USE_HPMA                                 // Add support for Honeywell HPMA115S0 particle concentration sensor (+1k4)
 //#define USE_SR04                                 // Add support for HC-SR04 ultrasonic devices (+1k code)
+  #define SR04_MAX_SENSOR_DISTANCE  500          // Set sensor max detection distance
 //#define USE_DYP                                  // Add support for DYP ME-007 ultrasonic distance sensor, serial port version (+0k5 code)
 #define USE_SERIAL_BRIDGE                        // Add support for software Serial Bridge (+0k8 code)
 //#define USE_TCP_BRIDGE                           //  Add support for Serial to TCP bridge (+1.3k code)
diff --git a/tasmota/xsns_22_sr04.ino b/tasmota/xsns_22_sr04.ino
index f2659f294..29876dce4 100644
--- a/tasmota/xsns_22_sr04.ino
+++ b/tasmota/xsns_22_sr04.ino
@@ -29,7 +29,11 @@
  * - https://www.dfrobot.com/wiki/index.php/Weather-proof_Ultrasonic_Sensor_SKU_:_SEN0207
 \*********************************************************************************************/
 
-#define XSNS_22              22
+#define XSNS_22                   22
+
+#ifndef SR04_MAX_SENSOR_DISTANCE
+#define SR04_MAX_SENSOR_DISTANCE  500
+#endif
 
 uint8_t sr04_type = 1;
 real64_t distance;
@@ -64,7 +68,7 @@ uint8_t Sr04TModeDetect(void)
     if (-1 == sr04_trig_pin) {
       sr04_trig_pin = Pin(GPIO_SR04_ECHO);  // if GPIO_SR04_TRIG is not configured use single PIN mode with GPIO_SR04_ECHO only
     }
-    sonar = new NewPing(sr04_trig_pin, sr04_echo_pin, 300);
+    sonar = new NewPing(sr04_trig_pin, sr04_echo_pin, SR04_MAX_SENSOR_DISTANCE);
   } else {
     if (sonar_serial->hardwareSerial()) {
       ClaimSerial();