From 38886e987f720750f373fd3bfcb4a152b700351d Mon Sep 17 00:00:00 2001
From: SteWers <github@wershoven.com>
Date: Fri, 7 Jan 2022 12:47:23 +0100
Subject: [PATCH] Resolve RTS-timing problem

On some devices there is a timing problem with the RTS line, when not using flush.
flush does wait until all data is send: https://www.arduino.cc/reference/en/language/functions/communication/serial/flush/
---
 tasmota/xnrg_12_solaxX1.ino | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tasmota/xnrg_12_solaxX1.ino b/tasmota/xnrg_12_solaxX1.ino
index 696b02757..534de4e47 100644
--- a/tasmota/xnrg_12_solaxX1.ino
+++ b/tasmota/xnrg_12_solaxX1.ino
@@ -162,6 +162,7 @@ void solaxX1_RS485Send(uint16_t msgLen)
   solaxX1Serial->write(message, msgLen);
   solaxX1Serial->write(highByte(crc));
   solaxX1Serial->write(lowByte(crc));
+  solaxX1Serial->flush();
   if (PinUsed(GPIO_SOLAXX1_RTS)) {
     digitalWrite(Pin(GPIO_SOLAXX1_RTS), LOW);
   }