Add command ``SetOption46 0..255``

Add command ``SetOption46 0..255`` to add 0..255 * 10 milliseconds power on delay before initializing I/O (#15438)

CHANGELOG.md

@@ -8,6 +8,7 @@ All notable changes to this project will be documented in this file.
 - Berry has persistent MQTT subscriptions: auto-subscribe at (re)connection
 - Berry automated solidification of code
 - Support of optional file calib.dat on ADE7953 based energy monitors like Shelly EM (#16486)
+- Command ``SetOption46 0..255`` to add 0..255 * 10 milliseconds power on delay before initializing I/O (#15438)
 
 ### Changed
 - ESP32 Increase number of button GPIOs from 8 to 28 (#16518)

RELEASENOTES.md

@@ -109,6 +109,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl http://ota.tasmo
 
 ## Changelog v12.1.1.2
 ### Added
+- Command ``SetOption46 0..255`` to add 0..255 * 10 milliseconds power on delay before initializing I/O [#15438](https://github.com/arendst/Tasmota/issues/15438)
 - Command ``SetOption146 1`` to enable display of ESP32 internal temperature
 - Command ``StatusRetain`` [#11109](https://github.com/arendst/Tasmota/issues/11109)
 - Command ``DspSpeed 2..127`` to control message rotation speed on display of POWR3xxD and THR3xxD

tasmota/include/tasmota.h

@@ -358,7 +358,7 @@ enum SO32_49Index { P_HOLD_TIME,              // SetOption32 - (Button/Switch) K
                     P_ROTARY_MAX_STEP,        // SetOption43 - (Rotary) Rotary step boundary (default 10)
                     P_IR_TOLERANCE,           // SetOption44 - (IR) Base tolerance percentage for matching incoming IR messages (default 25, max 100)
                     P_BISTABLE_PULSE,         // SetOption45 - (Bistable) Pulse time for two coil bistable latching relays (default 40)
-                    P_SO46_FREE,              // SetOption46
+                    P_POWER_ON_DELAY,         // SetOption46 - (PowerOn) Add delay of 10 x value milliseconds at power on
                     P_SO47_FREE,              // SetOption47
                     P_SO48_FREE,              // SetOption48
                     P_SO49_FREE               // SetOption49

tasmota/tasmota_support/support_tasmota.ino

@@ -416,6 +416,8 @@ void SetPowerOnState(void)
     }
   }
 
+//  AddLog(LOG_LEVEL_DEBUG, PSTR("PWR: PowerOnState %d restored"), Settings->poweronstate);
+
   // Issue #526 and #909
   uint32_t port = 0;
   for (uint32_t i = 0; i < TasmotaGlobal.devices_present; i++) {
@@ -2160,6 +2162,8 @@ void GpioInit(void)
     }
   }
 
+  delay(Settings->param[P_POWER_ON_DELAY] * 10);  // SetOption46 - Allow Wemos D1 power to stabilize before starting I2C polling for devices powered locally
+
 #ifdef USE_I2C
   TasmotaGlobal.i2c_enabled = (PinUsed(GPIO_I2C_SCL) && PinUsed(GPIO_I2C_SDA));
   if (TasmotaGlobal.i2c_enabled) {