From 43b1e8db21aed001e586980e209670c2cc7d5471 Mon Sep 17 00:00:00 2001
From: Neil McKechnie <neilmck999@gmail.com>
Date: Tue, 21 Feb 2023 11:00:27 +0000
Subject: [PATCH] Update LCD driver to make it more reliable

Delay times at startup extended to make start-up configuration more reliable.
---
 LiquidCrystal_I2C.cpp | 8 ++++----
 LiquidCrystal_I2C.h   | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/LiquidCrystal_I2C.cpp b/LiquidCrystal_I2C.cpp
index 3bf98ef..b8b8e97 100644
--- a/LiquidCrystal_I2C.cpp
+++ b/LiquidCrystal_I2C.cpp
@@ -80,15 +80,15 @@ bool LiquidCrystal_I2C::begin() {
 
   // we start in 8bit mode, try to set 4 bit mode
   write4bits(0x03);
-  delayMicroseconds(4500);  // wait min 4.1ms
+  delayMicroseconds(5000);  // wait min 4.1ms
 
   // second try
   write4bits(0x03);
-  delayMicroseconds(4500);  // wait min 4.1ms
+  delayMicroseconds(5000);  // wait min 4.1ms
 
   // third go!
   write4bits(0x03);
-  delayMicroseconds(150);
+  delayMicroseconds(5000);
 
   // finally, set to 4-bit interface
   write4bits(0x02);
@@ -112,7 +112,7 @@ bool LiquidCrystal_I2C::begin() {
 /********** high level commands, for the user! */
 void LiquidCrystal_I2C::clearNative() {
   command(LCD_CLEARDISPLAY);  // clear display, set cursor position to zero
-  delayMicroseconds(1600);    // this command takes 1.52ms
+  delayMicroseconds(2000);    // this command takes 1.52ms but allow plenty
 }
 
 void LiquidCrystal_I2C::setRowNative(byte row) {
diff --git a/LiquidCrystal_I2C.h b/LiquidCrystal_I2C.h
index daecd61..650ad15 100644
--- a/LiquidCrystal_I2C.h
+++ b/LiquidCrystal_I2C.h
@@ -90,7 +90,7 @@ private:
   uint8_t _displayfunction;
   uint8_t _displaycontrol;
   uint8_t _displaymode;
-  uint8_t _backlightval;
+  uint8_t _backlightval = 0;
 
   uint8_t outputBuffer[4];
   I2CRB rb;