From 311ab2db2f75f927d7b8dd12444497c50c7c3edb84b8c92c7f561b8fcf63f337 Mon Sep 17 00:00:00 2001
From: localhorst <localhorst@mosad.xyz>
Date: Sat, 7 Dec 2024 21:53:58 +0100
Subject: [PATCH] read temperatur via 1-Wire

---
 README.md     |  9 +++---
 main/inputs.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 79 insertions(+), 10 deletions(-)

diff --git a/README.md b/README.md
index 043ff5e..3eee925 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,8 @@ Safety <|-- HTTP_Metrics
 
 
 | Function| ESP32 | ES32C14 |
-|------------------|-----------------|------------------|
-| CirculationPump   | IO27  | Relay 1 NO1               |
-| Burner            | IO14  | Relay 1 NC2               |
-| Burner Fault      | IO19  | Digital Input IN1         |
+|-----------------------|-------|---------------------------|
+| CirculationPump       | IO27  | Relay 1 NO1               |
+| Burner                | IO14  | Relay 1 NC2               |
+| Burner Fault          | IO19  | Digital Input IN1         |
+| Temperature DS10B20   | IO04  | 1-Wire                    |
diff --git a/main/inputs.c b/main/inputs.c
index 8cc4522..8814114 100644
--- a/main/inputs.c
+++ b/main/inputs.c
@@ -2,12 +2,30 @@
 #include "freertos/task.h"
 #include "driver/gpio.h"
 #include "esp_log.h"
+#include <ds18x20.h>
 
 #include "inputs.h"
 
+#define MAX_DN18B20_SENSORS 4U
+
 static const char *TAG = "smart-oil-heater-control-system-inputs";
 const uint8_t uBurnerFaultPin = 19U;
+const uint8_t uDS18B20Pin = 4U;
+const onewire_addr_t uChamperTempSensorAddr = 0x3e0000001754be28;
+const onewire_addr_t uOutdoorTempSensorAddr = 0x880000001648e328;
+const onewire_addr_t uInletFlowTempSensorAddr = 0xe59cdef51e64ff28;
+const onewire_addr_t uReturnFlowTempSensorAddr = 0xa7a8e1531f64ff28;
+
+onewire_addr_t uOneWireAddresses[MAX_DN18B20_SENSORS];
+float fDS18B20Temps[MAX_DN18B20_SENSORS];
+size_t sSensorCount = 0U;
+
 static eBurnerErrorState sBurnerErrorState;
+static float fChamperTemperature;
+static float fOutdoorTemperature;
+static float fInletFlowTemperature;
+static float fReturnFlowTemperature;
+
 void loop(void *pvParameters);
 
 void initInputs(void)
@@ -44,11 +62,10 @@ void initInputs(void)
 
 void loop(void *pvParameters)
 {
-    // This task will run in a loop
     while (1)
     {
         ESP_LOGI(TAG, "Running task Input...");
-        vTaskDelay(1000 / portTICK_PERIOD_MS); // Delay for 1 second
+        vTaskDelay(1000U / portTICK_PERIOD_MS);
 
         if (gpio_get_level(uBurnerFaultPin) == 1)
         {
@@ -58,24 +75,75 @@ void loop(void *pvParameters)
         {
             sBurnerErrorState = NO_ERROR;
         }
+
+        if (ds18x20_scan_devices(uDS18B20Pin, uOneWireAddresses, MAX_DN18B20_SENSORS, &sSensorCount) != ESP_OK)
+        {
+            ESP_LOGE(TAG, "1-Wire device scan error!");
+        }
+
+        if (!sSensorCount)
+        {
+            ESP_LOGW(TAG, "No 1-Wire devices detected!");
+        }
+        else
+        {
+            ESP_LOGI(TAG, "%d 1-Wire devices detected", sSensorCount);
+
+            if (sSensorCount > MAX_DN18B20_SENSORS)
+            {
+                sSensorCount = MAX_DN18B20_SENSORS;
+                ESP_LOGW(TAG, "More 1-Wire devices found than expected!");
+            }
+
+            if (ds18x20_measure_and_read_multi(uDS18B20Pin, uOneWireAddresses, sSensorCount, fDS18B20Temps) != ESP_OK)
+            {
+                ESP_LOGE(TAG, "1-Wire devices read error");
+            }
+            else
+            {
+                for (int j = 0; j < sSensorCount; j++)
+                {
+                    float temp_c = fDS18B20Temps[j];
+                    ESP_LOGI(TAG, "Sensor: %08" PRIx64 " reports %.3f°C", (uint64_t)uOneWireAddresses[j], temp_c);
+
+                    switch ((uint64_t)uOneWireAddresses[j])
+                    {
+                    case ((uint64_t)uChamperTempSensorAddr):
+                        fChamperTemperature = temp_c;
+                        break;
+                    case ((uint64_t)uOutdoorTempSensorAddr):
+                        fOutdoorTemperature = temp_c;
+                        break;
+                    case ((uint64_t)uInletFlowTempSensorAddr):
+                        fInletFlowTemperature = temp_c;
+                        break;
+                    case ((uint64_t)uReturnFlowTempSensorAddr):
+                        fReturnFlowTemperature = temp_c;
+                        break;
+                    default:
+                        break;
+                    }
+                }
+            }
+        }
     }
 }
 
 float getChamberTemperature(void)
 {
-    return 42.42;
+    return fChamperTemperature;
 }
 float getOutdoorTemperature(void)
 {
-    return 42.42;
+    return fOutdoorTemperature;
 }
 float getInletFlowTemperature(void)
 {
-    return 42.42;
+    return fInletFlowTemperature;
 }
 float getReturnFlowTemperature(void)
 {
-    return 42.42;
+    return fReturnFlowTemperature;
 }
 eBurnerErrorState getBurnerError(void)
 {