From 4ddd74577181961a112a08fb9f72be15f3261a82 Mon Sep 17 00:00:00 2001
From: Huib Wouters <huib.wouters@gmail.com>
Date: Fri, 23 Feb 2024 20:26:19 +0100
Subject: [PATCH] added support for the :GC# command for Moonlite focuser
 (#2004)

* Added the :GC# command to retreive the stored temperature coefficient from my focuser

* Added the :GC# command to retreive the stored temperature coefficient from my focuser
---
 drivers/focuser/moonlite.cpp | 24 ++++++++++++++++++++++++
 drivers/focuser/moonlite.h   |  2 ++
 2 files changed, 26 insertions(+)

diff --git a/drivers/focuser/moonlite.cpp b/drivers/focuser/moonlite.cpp
index f12274289b..1f574ddefb 100644
--- a/drivers/focuser/moonlite.cpp
+++ b/drivers/focuser/moonlite.cpp
@@ -205,6 +205,27 @@ bool MoonLite::readTemperature()
     return true;
 }
 
+bool MoonLite::readTemperatureCoefficient()
+{
+    char res[ML_RES] = {0};
+
+    if (sendCommand(":GC#", res) == false)
+        return false;
+
+    uint8_t coefficient = 0;
+    int rc = sscanf(res, "%hhX", &coefficient);
+    if (rc > 0)
+        // Signed HEX of two digits
+        TemperatureSettingNP[1].setValue(static_cast<int8_t>(coefficient) / 2.0);
+    else
+    {
+        LOGF_ERROR("Unknown error: focuser temperature coefficient value (%s)", res);
+        return false;
+    }
+
+    return true;
+}
+
 bool MoonLite::readPosition()
 {
     char res[ML_RES] = {0};
@@ -425,6 +446,9 @@ void MoonLite::GetFocusParams()
     if (readTemperature())
         TemperatureNP.apply();
 
+    if (readTemperatureCoefficient())
+        TemperatureSettingNP.apply();
+
     if (readSpeed())
         IDSetNumber(&FocusSpeedNP, nullptr);
 
diff --git a/drivers/focuser/moonlite.h b/drivers/focuser/moonlite.h
index 0b709b8b95..4a70419255 100644
--- a/drivers/focuser/moonlite.h
+++ b/drivers/focuser/moonlite.h
@@ -102,6 +102,8 @@ class MoonLite : public INDI::Focuser
         bool readStepMode();
         // Read and update Temperature
         bool readTemperature();
+        // Read and update Temperature Coefficient
+		bool readTemperatureCoefficient();
         // Read and update Position
         bool readPosition();
         // Read and update speed