From 5e9fe677f387bcde7ad226cbb8ff5c03b9566aae Mon Sep 17 00:00:00 2001
From: jaymemaurice <38895319+jaymemaurice@users.noreply.github.com>
Date: Thu, 11 Feb 2021 14:48:55 -0500
Subject: [PATCH] Precise temperature without pow

Implement TuyaAdjustedTemperature which takes precision to offset the integer value.
Using TempRes parameter as these should align
---
 tasmota/xdrv_16_tuyamcu.ino | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/tasmota/xdrv_16_tuyamcu.ino b/tasmota/xdrv_16_tuyamcu.ino
index a66f6e170..9c9221b07 100644
--- a/tasmota/xdrv_16_tuyamcu.ino
+++ b/tasmota/xdrv_16_tuyamcu.ino
@@ -318,6 +318,23 @@ int StrCmpNoCase(char const *Str1, char const *Str2) // Compare case sensistive
   }
 }
 
+float TuyaAdjustedTemperature(uint8_t packetValue, uint8_t res)
+{
+    switch (res)
+    {
+    case 1:
+        return packetValue/10;
+        break;
+    case 2:
+        return packetValue/100;
+        break;
+    case 3:
+        return packetValue/1000;
+        break;    
+    default:
+        return (float)packetValue;
+    } 
+}
 /*********************************************************************************************\
  * Internal Functions
 \*********************************************************************************************/
@@ -1295,7 +1312,7 @@ void TuyaSensorsShow(bool json)
 
         GetTextIndexed(sname, sizeof(sname), (sensor-71), kTuyaSensors);
         ResponseAppend_P(PSTR("\"%s\":%s"), sname,
-                        (Tuya.SensorsValid[sensor-71] ? dtostrfd((float)Tuya.Sensors[sensor-71] / pow(10, res), res, tempval) : PSTR("null")));
+                        (Tuya.SensorsValid[sensor-71] ? dtostrfd(TuyaAdjustedTemperature(Tuya.Sensors[sensor-71], res), res, tempval) : PSTR("null")));
         added = true;
       }
   #ifdef USE_WEBSERVER
@@ -1303,11 +1320,11 @@ void TuyaSensorsShow(bool json)
       if (TuyaGetDpId(sensor) != 0) {
         switch (sensor) {
           case 71:
-            WSContentSend_Temp("", (float)Tuya.Sensors[0] / pow(10, Settings.flag2.temperature_resolution));
+            WSContentSend_Temp("", TuyaAdjustedTemperature(Tuya.Sensors[0], Settings.flag2.temperature_resolution));
             break;
           case 72:
             WSContentSend_PD(PSTR("{s}" D_TEMPERATURE " Set{m}%s " D_UNIT_DEGREE "%c{e}"),
-                            dtostrfd((float)Tuya.Sensors[1] / pow(10, Settings.flag2.temperature_resolution), Settings.flag2.temperature_resolution, tempval), TempUnit());
+                            dtostrfd(TuyaAdjustedTemperature(Tuya.Sensors[1], Settings.flag2.temperature_resolution), Settings.flag2.temperature_resolution, tempval), TempUnit());
             break;
           case 73:
             WSContentSend_PD(HTTP_SNS_HUM, "", dtostrfd(Tuya.Sensors[2], Settings.flag2.temperature_resolution, tempval));