From 01391aa6aacf9e84a8f2f9fd49676e28a0d1bf53 Mon Sep 17 00:00:00 2001
From: Damjan Adamic <projectkk2glider@gmail.com>
Date: Sun, 27 Apr 2014 18:12:06 +0200
Subject: [PATCH] Return 0 for all temeletry values, when telemetry not
 available.

---
 radio/src/lua.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/radio/src/lua.cpp b/radio/src/lua.cpp
index f6863ee6d..d68d083c8 100644
--- a/radio/src/lua.cpp
+++ b/radio/src/lua.cpp
@@ -118,30 +118,41 @@ static void __luaGetValue(int src)
   else if (i<=MIXSRC_FIRST_TELEM-1+TELEM_CSW_MAX) return *(((int16_t*)(&frskyData.hub.minAltitude))+i-(MIXSRC_FIRST_TELEM-1+TELEM_MIN_ALT));
 
   */
+  if (!TELEMETRY_STREAMING() && src>=MIXSRC_FIRST_TELEM && src<=MIXSRC_LAST_TELEM) {
+    //telemetry not working, return zero
+    lua_pushinteger(L, (int)0);
+    return;
+  }
   switch (src) {
     case MIXSRC_FIRST_TELEM-1+TELEM_TX_VOLTAGE:
     case MIXSRC_FIRST_TELEM-1+TELEM_VFAS:
     case MIXSRC_FIRST_TELEM-1+TELEM_CELLS_SUM:
     case MIXSRC_FIRST_TELEM-1+TELEM_CURRENT:
     case MIXSRC_FIRST_TELEM-1+TELEM_VSPEED:
+      //theese need to be divided by 10
       lua_pushnumber(L, getValue(src)/10.0);
       break;
 
     case MIXSRC_FIRST_TELEM-1+TELEM_A1:
     case MIXSRC_FIRST_TELEM-1+TELEM_A2:
+      //convert raw A1/2 values to calibrated values
       lua_pushnumber(L, applyChannelRatio(src-(MIXSRC_FIRST_TELEM-1+TELEM_A1), getValue(src))/100.0);
       break;
 
     case MIXSRC_FIRST_TELEM-1+TELEM_MIN_A1:
     case MIXSRC_FIRST_TELEM-1+TELEM_MIN_A2:
+      //convert raw A1/2 values to calibrated values
       lua_pushnumber(L, applyChannelRatio(src-(MIXSRC_FIRST_TELEM-1+TELEM_MIN_A1), getValue(src))/100.0);
       break;
 
     case MIXSRC_FIRST_TELEM-1+TELEM_CELL:
     case MIXSRC_FIRST_TELEM-1+TELEM_ALT:
+      //theese need to be divided by 100
       lua_pushnumber(L, getValue(src)/100.0);
       break;
 
+    //TODO other values that neeed special treatment like maxAlititude,...
+
     default:
       lua_pushinteger(L, getValue(src));
   }