Add command ``WifiPower 0``

Add command ``WifiPower 0`` to enable dynamic wifi power based on RSSI by @TD-er (#15443)

CHANGELOG.md

@@ -3,7 +3,19 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased] - Development
 
-## [12.5.0.2]
+## [12.5.0.3]
+### Added
+- Command ``WifiPower 0`` to enable dynamic wifi power based on RSSI by @TD-er (#15443)
+
+### Breaking Changed
+
+### Changed
+
+### Fixed
+
+### Removed
+
+## [12.5.0.2] 20230516
 ### Added
 - Matter support for Shutters with Tilt
 - Matter POC for remote Relay
@@ -31,8 +43,6 @@ All notable changes to this project will be documented in this file.
 - Berry fixed a rare condition when a GC causes a memory corruption
 - LED PWM ac_dimmer curve was wrongly applied instead of Gamma regression from v12.2.0.5 (#18666)
 
-### Removed
-
 ## [12.5.0.1] 20230505
 ### Added
 - Matter sensors Humidity, Pressure, Illuminance; optimize memory (#18441)

RELEASENOTES.md

@@ -110,11 +110,11 @@ The latter links can be used for OTA upgrades too like ``OtaUrl https://ota.tasm
 
 [Complete list](BUILDS.md) of available feature and sensors.
 
-## Changelog v12.5.0.2
+## Changelog v12.5.0.3
 ### Added
-- Command ``SetOption152 0/1`` to select two (0 = default) pin bistable or one (1) pin
+- Command ``SetOption152 0/1`` to select two (0 = default) pin bistable or one (1) pin latching relay control [#18386](https://github.com/arendst/Tasmota/issues/18386)
-latching relay control [#18386](https://github.com/arendst/Tasmota/issues/18386)
 - Command ``I2cScan0`` to scan both busses on ESP32 with one command
+- Command ``WifiPower 0`` to enable dynamic wifi power based on RSSI by @TD-er [#15443](https://github.com/arendst/Tasmota/issues/15443)
 - Support for TC74 temperature sensor by Michael Loftis [#18042](https://github.com/arendst/Tasmota/issues/18042)
 - Support for GM861 1D and 2D bar code reader [#18399](https://github.com/arendst/Tasmota/issues/18399)
 - Support for PCA9557 8-bit I/O expander [#18632](https://github.com/arendst/Tasmota/issues/18632)

tasmota/include/tasmota_version.h

@@ -20,6 +20,6 @@
 #ifndef _TASMOTA_VERSION_H_
 #define _TASMOTA_VERSION_H_
 
-const uint32_t VERSION = 0x0C050002;   // 12.5.0.2
+const uint32_t VERSION = 0x0C050003;   // 12.5.0.3
 
 #endif  // _TASMOTA_VERSION_H_

tasmota/tasmota.ino

@@ -105,6 +105,7 @@
 const uint32_t VERSION_MARKER[] PROGMEM = { 0x5AA55AA5, 0xFFFFFFFF, 0xA55AA55A };
 
 struct WIFI {
+  int last_tx_pwr;
   uint32_t last_event = 0;                 // Last wifi connection event
   uint32_t downtime = 0;                   // Wifi down duration
   uint16_t link_count = 0;                 // Number of wifi re-connect

tasmota/tasmota_support/support_command.ino

@@ -2523,8 +2523,7 @@ void CmndLedPwmMode(void) {
   }
 }
 
-void CmndWifiPower(void)
+void CmndWifiPower(void) {
-{
   if (XdrvMailbox.data_len > 0) {
     Settings->wifi_output_power = (uint8_t)(CharToFloat(XdrvMailbox.data) * 10);
     if (Settings->wifi_output_power > 205) {
@@ -2532,7 +2531,11 @@ void CmndWifiPower(void)
     }
     WifiSetOutputPower();
   }
-  ResponseCmndChar(WifiGetOutputPower().c_str());
+  if (Settings->wifi_output_power) {
+    ResponseCmndChar(WifiGetOutputPower().c_str());
+  } else {
+    ResponseCmndNumber(Wifi.last_tx_pwr / 10);
+  }
 }
 
 void CmndWifi(void)

tasmota/tasmota_support/support_tasmota.ino

@@ -1241,6 +1241,10 @@ void Every100mSeconds(void)
       }
     }
   }
+
+  if (0 == Settings->wifi_output_power) {
+    WiFiSetTXpowerBasedOnRssi();
+  }
 }
 
 /*-------------------------------------------------------------------------------------------*\

tasmota/tasmota_support/support_wifi.ino

@@ -966,9 +966,114 @@ String WifiGetOutputPower(void)
   return String(stemp1);
 }
 
-void WifiSetOutputPower(void)
+void WifiSetOutputPower(void) {
-{
+  if (Settings->wifi_output_power) {
-  WiFi.setOutputPower((float)(Settings->wifi_output_power) / 10);
+    WiFi.setOutputPower((float)(Settings->wifi_output_power) / 10);
+  }
+}
+
+/*
+  Dynamic WiFi transmit power based on RSSI lowering overall DC power usage
+
+  Original idea by ESPEasy (@TD-er)
+*/
+#ifdef ESP32
+  #if defined(CONFIG_IDF_TARGET_ESP32S2)
+    #define MAX_TX_PWR_DBM_11b    195
+    #define MAX_TX_PWR_DBM_54g    150
+    #define MAX_TX_PWR_DBM_n      130
+    #define WIFI_SENSITIVITY_11b  -880
+    #define WIFI_SENSITIVITY_54g  -750
+    #define WIFI_SENSITIVITY_n    -720
+  #elif defined(CONFIG_IDF_TARGET_ESP32S3)
+    #define MAX_TX_PWR_DBM_11b    210
+    #define MAX_TX_PWR_DBM_54g    190
+    #define MAX_TX_PWR_DBM_n      185
+    #define WIFI_SENSITIVITY_11b  -880
+    #define WIFI_SENSITIVITY_54g  -760
+    #define WIFI_SENSITIVITY_n    -720
+  #elif defined(CONFIG_IDF_TARGET_ESP32C3)
+    #define MAX_TX_PWR_DBM_11b    210
+    #define MAX_TX_PWR_DBM_54g    190
+    #define MAX_TX_PWR_DBM_n      185
+    #define WIFI_SENSITIVITY_11b  -880
+    #define WIFI_SENSITIVITY_54g  -760
+    #define WIFI_SENSITIVITY_n    -730
+  #else
+    #define MAX_TX_PWR_DBM_11b    195
+    #define MAX_TX_PWR_DBM_54g    160
+    #define MAX_TX_PWR_DBM_n      140
+    #define WIFI_SENSITIVITY_11b  -880
+    #define WIFI_SENSITIVITY_54g  -750
+    #define WIFI_SENSITIVITY_n    -700
+  #endif
+#endif
+#ifdef ESP8266
+  #define MAX_TX_PWR_DBM_11b    200
+  #define MAX_TX_PWR_DBM_54g    170
+  #define MAX_TX_PWR_DBM_n      140
+  #define WIFI_SENSITIVITY_11b  -910
+  #define WIFI_SENSITIVITY_54g  -750
+  #define WIFI_SENSITIVITY_n    -720
+#endif
+
+void WiFiSetTXpowerBasedOnRssi(void) {
+  const WiFiMode_t cur_mode = WiFi.getMode();
+  if (cur_mode == WIFI_OFF) { return; }
+
+  // Range ESP32  : 2dBm - 20dBm
+  // Range ESP8266: 0dBm - 20.5dBm
+//  int maxTXpwr = Settings->wifi_output_power;
+  int maxTXpwr = 210;
+  int threshold = WIFI_SENSITIVITY_n;
+  int phy_mode = WiFi.getPhyMode();
+  switch (phy_mode) {
+    case 1:                  // 11b (WIFI_PHY_MODE_11B)
+      threshold = WIFI_SENSITIVITY_11b;
+      if (maxTXpwr > MAX_TX_PWR_DBM_11b) maxTXpwr = MAX_TX_PWR_DBM_11b;
+      break;
+    case 2:                  // 11bg (WIFI_PHY_MODE_11G)
+      threshold = WIFI_SENSITIVITY_54g;
+      if (maxTXpwr > MAX_TX_PWR_DBM_54g) maxTXpwr = MAX_TX_PWR_DBM_54g;
+      break;
+    case 3:                  // 11bgn (WIFI_PHY_MODE_11N)
+      threshold = WIFI_SENSITIVITY_n;
+      if (maxTXpwr > MAX_TX_PWR_DBM_n) maxTXpwr = MAX_TX_PWR_DBM_n;
+      break;
+  }
+  threshold += 30;           // Margin in dBm * 10 on top of threshold
+  int minTXpwr = 0;
+
+  // Assume AP sends with max set by ETSI standard.
+  // 2.4 GHz: 100 mWatt (20 dBm)
+  // US and some other countries allow 1000 mW (30 dBm)
+  int rssi = WiFi.RSSI() * 10;
+  int newrssi = rssi - 200;  // We cannot send with over 20 dBm, thus it makes no sense to force higher TX power all the time.
+
+  if (newrssi < threshold) {
+    minTXpwr = threshold - newrssi;
+  }
+  if (minTXpwr > maxTXpwr) {
+    minTXpwr = maxTXpwr;
+  }
+  int dBm = 0;
+  if (dBm > maxTXpwr) {
+    dBm = maxTXpwr;
+  } else if (dBm < minTXpwr) {
+    dBm = minTXpwr;
+  }
+  WiFi.setOutputPower((float)dBm / 10);
+
+  delay(Wifi.last_tx_pwr < dBm);  // If increase the TX power, give power supply of the unit some rest
+  Wifi.last_tx_pwr = dBm;
+
+/*
+  int TX_pwr_int = Wifi.last_tx_pwr * 4;
+  int maxTXpwr_int = maxTXpwr * 4;
+  if (TX_pwr_int != maxTXpwr_int) {
+    AddLog(LOG_LEVEL_DEBUG, PSTR("WIF: TX power %d, Sensitivity %d, RSSI %d"), dBm / 10, threshold/ 10, rssi / 10);
+  }
+*/
 }
 
 /*