diff --git a/sonoff/_changelog.ino b/sonoff/_changelog.ino
index 0a0f6c90f..2a94dec7a 100644
--- a/sonoff/_changelog.ino
+++ b/sonoff/_changelog.ino
@@ -2,6 +2,7 @@
  * Change webserver HTML input, button, textarea, and select name based on id
  * Fix webserver multiple Javascript window.onload functionality
  * Fix PZem startup issue (#5875)
+ * Add command SetOption39 1..255 to control CSE7766 (Pow R2) or HLW8032 (Blitzwolf SHP5) handling of power loads below 6W. Default setting is 128 (#5756)
  *
  * 6.5.0.13 20190527
  * Add command SetOption38 6..255 to set IRReceive protocol detection sensitivity mimizing UNKNOWN protocols (#5853)
diff --git a/sonoff/sonoff.h b/sonoff/sonoff.h
index d7d4ef905..d6c4f20b1 100644
--- a/sonoff/sonoff.h
+++ b/sonoff/sonoff.h
@@ -236,7 +236,7 @@ enum ButtonStates { PRESSED, NOT_PRESSED };
 
 enum Shortcuts { SC_CLEAR, SC_DEFAULT, SC_USER };
 
-enum SettingsParmaIndex {P_HOLD_TIME, P_MAX_POWER_RETRY, P_TUYA_DIMMER_ID, P_MDNS_DELAYED_START, P_BOOT_LOOP_OFFSET, P_RGB_REMAP, P_IR_UNKNOW_THRESHOLD, P_MAX_PARAM8};  // Max is PARAM8_SIZE (18) - SetOption32 until SetOption49
+enum SettingsParmaIndex {P_HOLD_TIME, P_MAX_POWER_RETRY, P_TUYA_DIMMER_ID, P_MDNS_DELAYED_START, P_BOOT_LOOP_OFFSET, P_RGB_REMAP, P_IR_UNKNOW_THRESHOLD, P_CSE7766_INVALID_POWER, P_MAX_PARAM8};  // Max is PARAM8_SIZE (18) - SetOption32 until SetOption49
 
 enum DomoticzSensors {DZ_TEMP, DZ_TEMP_HUM, DZ_TEMP_HUM_BARO, DZ_POWER_ENERGY, DZ_ILLUMINANCE, DZ_COUNT, DZ_VOLTAGE, DZ_CURRENT, DZ_AIRQUALITY, DZ_MAX_SENSORS};
 
diff --git a/sonoff/xnrg_02_cse7766.ino b/sonoff/xnrg_02_cse7766.ino
index b2b2cecca..793cf08ce 100644
--- a/sonoff/xnrg_02_cse7766.ino
+++ b/sonoff/xnrg_02_cse7766.ino
@@ -1,5 +1,5 @@
 /*
-  xnrg_02_cse7766.ino - CSE7766 energy sensor support for Sonoff-Tasmota
+  xnrg_02_cse7766.ino - CSE7766 and HLW8032 energy sensor support for Sonoff-Tasmota
 
   Copyright (C) 2019  Theo Arends
 
@@ -21,6 +21,7 @@
 #ifdef USE_CSE7766
 /*********************************************************************************************\
  * CSE7766 - Energy (Sonoff S31 and Sonoff Pow R2)
+ * HLW8032 - Energy (Blitzwolf SHP5)
  *
  * Based on datasheet from http://www.chipsea.com/UploadFiles/2017/08/11144342F01B5662.pdf
 \*********************************************************************************************/
@@ -44,7 +45,7 @@ long power_cycle = 0;
 long power_cycle_first = 0;
 long cf_pulses = 0;
 long cf_pulses_last_time = CSE_PULSES_NOT_INITIALIZED;
-uint8_t cse_power_invalid = CSE_MAX_INVALID_POWER;
+uint8_t cse_power_invalid = 0;
 
 void CseReceived(void)
 {
@@ -106,7 +107,7 @@ void CseReceived(void)
         }
       }
     } else {
-      if (cse_power_invalid < CSE_MAX_INVALID_POWER) {  // Allow measurements down to about 1W
+      if (cse_power_invalid < Settings.param[P_CSE7766_INVALID_POWER]) {  // Allow measurements down to about 1W
         cse_power_invalid++;
       } else {
         power_cycle_first = 0;
@@ -209,6 +210,10 @@ void CseDrvInit(void)
     if ((3 == pin[GPIO_CSE7766_RX]) && (1 == pin[GPIO_CSE7766_TX])) {  // As it uses 8E1 currently only hardware serial is supported
       baudrate = 4800;
       serial_config = SERIAL_8E1;
+      if (0 == Settings.param[P_CSE7766_INVALID_POWER]) {
+        Settings.param[P_CSE7766_INVALID_POWER] = CSE_MAX_INVALID_POWER;  // SetOption39 1..255
+      }
+      cse_power_invalid = Settings.param[P_CSE7766_INVALID_POWER];
       energy_flg = XNRG_02;
     }
   }