From 3c645ca232f7c3ccf939cc52e23865cafff043cc Mon Sep 17 00:00:00 2001
From: Piotr Lewandowski <plewandowski012@gmail.com>
Date: Sun, 21 Apr 2024 13:25:52 +0200
Subject: [PATCH] added preamble conf placeholder with def val, changed def to
 8 symbols

---
 data/preferences.cfg          | 2 +-
 data_embed/index.html         | 2 +-
 src/TTGO_T-Beam_LoRa_APRS.ino | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/data/preferences.cfg b/data/preferences.cfg
index 0e762b0..715bd9b 100644
--- a/data/preferences.cfg
+++ b/data/preferences.cfg
@@ -14,7 +14,7 @@
   "lora_rx_en": true,
   "lora_tx_en": true,
   "txPower": 23,
-  "preambleLen": 64,
+  "preambleLen": 8,
   "lora_cradapt": false,
   "lora_rssi2p": 34,
   "snraprsis": true,
diff --git a/data_embed/index.html b/data_embed/index.html
index ef6e4f8..22e3410 100644
--- a/data_embed/index.html
+++ b/data_embed/index.html
@@ -156,7 +156,7 @@ You like to enable, if you use your tracker portable and it should automatically
                     </div>
                     <div>
                         <label for="preambleLen">TX preamble length [symbols]</label>
-                        <input name="preambleLen" id="preambleLen" type="number" min="8" max="4096" title="A larger preamble size improves packet detection but increases transmission time. Range 8 to 4096 symbols.">
+                        <input name="preambleLen" id="preambleLen" type="number" min="8" max="4096" title="A larger preamble size improves packet detection but increases transmission time. Range 8 to 4096 symbols." placeholder="8">
                     </div>
                     <div>
                         <label for="lora_cradapt">Automatic CodeRate adaption on TX</label>
diff --git a/src/TTGO_T-Beam_LoRa_APRS.ino b/src/TTGO_T-Beam_LoRa_APRS.ino
index 4654bd9..1db8659 100644
--- a/src/TTGO_T-Beam_LoRa_APRS.ino
+++ b/src/TTGO_T-Beam_LoRa_APRS.ino
@@ -448,8 +448,8 @@ boolean lora_tx_enabled = true;
   uint8_t txPower_cross_digi = 23;
 #endif
 #endif
-uint32_t preambleLen = 64; // default tx preamble len
-constexpr uint32_t rxTimeoutSymbols = 1024; // extended rx timout to avoid rejecting packets with long preamble
+uint16_t preambleLen = 8; // default tx preamble len
+constexpr uint16_t rxTimeoutSymbols = 1024; // extended rx timout to avoid rejecting packets with long preamble
 
 #define UNITS_SPEED_KMH 1
 #define UNITS_SPEED_MS  2