Add delayed SetPowerOnState

Add delayed SetPowerOnState to Sonoff SPM (#13447)

CHANGELOG.md

@@ -8,6 +8,7 @@ All notable changes to this project will be documented in this file.
 - Support for Sonoff MS01 soil moisture sensor (#15335)
 - Support for daisy chaining MAX7219 displays (#15345)
 - Command ``EnergyExportActive<phase>`` to (p)reset energy export active for supported devices. Currently ADE7880 only (#13515)
+- Sonoff SPM delayed SetPowerOnState (#13447)
 
 ### Changed
 

RELEASENOTES.md

@@ -109,6 +109,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl http://ota.tasmo
 - Command ``EnergyExportActive<phase>`` to (p)reset energy export active for supported devices. Currently ADE7880 only [#13515](https://github.com/arendst/Tasmota/issues/13515)
 - Support for Sonoff MS01 soil moisture sensor [#15335](https://github.com/arendst/Tasmota/issues/15335)
 - Support for daisy chaining MAX7219 displays [#15345](https://github.com/arendst/Tasmota/issues/15345)
+- Sonoff SPM delayed SetPowerOnState [#13447](https://github.com/arendst/Tasmota/issues/13447)
 
 ### Breaking Changed
 

tasmota/xdrv_86_esp32_sonoff_spm.ino

@@ -251,6 +251,7 @@ typedef struct {
 
   uint32_t timeout;
   power_t old_power;
+  power_t power_on_state;
   uint16_t last_totals;
   uint16_t serial_in_byte_counter;
   uint16_t expected_bytes;
@@ -1097,6 +1098,14 @@ void SSPMHandleReceivedData(void) {
         } else {
           AddLog(LOG_LEVEL_DEBUG, PSTR("SPM: Relay scan done"));
 
+#ifndef SSPM_SIMULATE
+          if (Sspm->power_on_state) {
+            TasmotaGlobal.power = Sspm->power_on_state;
+            Sspm->power_on_state = 0;
+            SetPowerOnState();
+          }
+#endif
+
           Sspm->mstate = SPM_SCAN_COMPLETE;
         }
         break;
@@ -1704,6 +1713,7 @@ void SSPMInit(void) {
   Sspm->history_relay = 255;                  // Disable display energy history
   Sspm->log_relay = 255;                      // Disable display logging
   Sspm->old_power = TasmotaGlobal.power;
+  Sspm->power_on_state = TasmotaGlobal.power;
   Sspm->mstate = SPM_WAIT;                    // Start init sequence
 }