Fix PZem startup issue

Fix PZem startup issue (#5875)

sonoff/_changelog.ino

@@ -1,6 +1,7 @@
 /* 6.5.0.14 20190602
  * Change webserver HTML input, button, textarea, and select name based on id
  * Fix webserver multiple Javascript window.onload functionality
+ * Fix PZem startup issue (#5875)
  *
  * 6.5.0.13 20190527
  * Add command SetOption38 6..255 to set IRReceive protocol detection sensitivity mimizing UNKNOWN protocols (#5853)

sonoff/xnrg_05_pzem_ac.ino

@@ -36,6 +36,24 @@
 #include <TasmotaModbus.h>
 TasmotaModbus *PzemAcModbus;
 
+/*
+uint16_t PzemCalculateCRC(uint8_t *buffer, uint8_t num)
+{
+  uint16_t crc = 0xFFFF;
+  for (uint8_t i = 0; i < num; i++) {
+    crc ^= buffer[i];
+    for (uint8_t j = 8; j; j--) {
+      if ((crc & 0x0001) != 0) {        // If the LSB is set
+        crc >>= 1;                      // Shift right and XOR 0xA001
+        crc ^= 0xA001;
+      } else {                          // Else LSB is not set
+        crc >>= 1;                      // Just shift right
+      }
+    }
+  }
+  return crc;
+}
+*/
 void PzemAcEverySecond(void)
 {
   static uint8_t send_retry = 0;
@@ -51,6 +69,7 @@ void PzemAcEverySecond(void)
     if (error) {
       AddLog_P2(LOG_LEVEL_DEBUG, PSTR(D_LOG_DEBUG "PzemAc response error %d"), error);
     } else {
+//      if ((PzemCalculateCRC(buffer, 23)) == ((buffer[24] << 8) | buffer[23])) {
         energy_data_valid = 0;
 
         //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
@@ -69,6 +88,7 @@ void PzemAcEverySecond(void)
           energy_start = energy;
         }
         EnergyUpdateToday();
+//      }
     }
   }
 
@@ -118,7 +138,7 @@ int Xnrg05(uint8_t function)
         PzemAcSnsInit();
         break;
       case FUNC_ENERGY_EVERY_SECOND:
-        PzemAcEverySecond();
+        if (uptime > 4) { PzemAcEverySecond(); }  // Fix start up issue #5875
         break;
     }
   }

sonoff/xnrg_06_pzem_dc.ino

@@ -117,7 +117,7 @@ int Xnrg06(uint8_t function)
         PzemDcSnsInit();
         break;
       case FUNC_ENERGY_EVERY_SECOND:
-        PzemDcEverySecond();
+        if (uptime > 4) { PzemDcEverySecond(); }  // Fix start up issue #5875
         break;
     }
   }