From 10edae2b75d5599003938657ef42b7d684eb3c01 Mon Sep 17 00:00:00 2001
From: sh123 <sh123@users.noreply.github.com>
Date: Wed, 9 Dec 2020 12:05:48 +0200
Subject: [PATCH] Add support for KISS tnc SlotTime command

---
 loraprs_service.cpp | 11 ++++++++++-
 loraprs_service.h   |  3 +++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/loraprs_service.cpp b/loraprs_service.cpp
index cb4b8ec..a316780 100644
--- a/loraprs_service.cpp
+++ b/loraprs_service.cpp
@@ -6,6 +6,7 @@ Service::Service()
   : kissState_(KissState::Void)
   , kissCmd_(KissCmd::NoCmd)
   , csmaP_(CfgCsmaPersistence)
+  , csmaSlotTime_(CfgCsmaSlotTimeMs)
   , serialBt_()
 {
 }
@@ -162,7 +163,7 @@ void Service::loop()
       }
     }
     else {
-      delay(CfgCsmaSlotTimeMs);
+      delay(csmaSlotTime_);
     }
   }
   delay(CfgPollDelayMs);
@@ -359,6 +360,10 @@ void Service::onBtDataAvailable()
             kissCmd_ = (KissCmd)rxByte;
             kissState_ = KissState::GetP;
           }
+          else if (rxByte == KissCmd::SlotTime) {
+            kissCmd_ = (KissCmd)rxByte;
+            kissState_ = KissState::GetSlotTime;
+          }
           else {
             kissResetState();
           }
@@ -368,6 +373,10 @@ void Service::onBtDataAvailable()
         csmaP_ = rxByte;
         kissState_ = KissState::GetData;
         break;
+      case KissState::GetSlotTime:
+        csmaSlotTime_ = (long)rxByte * 10;
+        kissState_ = KissState::GetData;
+        break;
       case KissState::GetData:
         if (rxByte == KissMarker::Fesc) {
           kissState_ = KissState::Escape;
diff --git a/loraprs_service.h b/loraprs_service.h
index 883caaa..b599299 100644
--- a/loraprs_service.h
+++ b/loraprs_service.h
@@ -58,12 +58,14 @@ private:
     GetCmd,
     GetData,
     GetP,
+    GetSlotTime,
     Escape
   };
 
   enum KissCmd {
     Data = 0x00,
     P = 0x02,
+    SlotTime = 0x03,
     NoCmd = 0x80
   };
 
@@ -107,6 +109,7 @@ private:
   KissCmd kissCmd_;
   long previousBeaconMs_;
   byte csmaP_;
+  long csmaSlotTime_;
   
   // peripherals
   BluetoothSerial serialBt_;