Andrew Klimenyuk / Mbed 2 deprecated STM32F103C8T6_WIFI_Heating_system

STM32F103C8T6_WIFI_Heating_system

Dependencies:   mbed mbed-STM32F103C8T6 eeprom_flash Watchdog PinDetect DS1820

  1. Bluepill STM32F103C8T6 Heating system
    1. _This project is core part of bigger heating system project!_

Features - Reading temperature from four DS18B20 sensors - Making a decision about switching on/off heater and pomp - Executing simple user commands from UART - Storing state parameters to program memory (EEPROM emulation)

Diff: temp_controller/temp_controller.cpp

Revision:
52:20d6bf661fd6
Parent:
50:94730b99ea41
Child:
55:3378972851fd
--- a/temp_controller/temp_controller.cpp	Mon Sep 24 14:57:38 2018 +0000
+++ b/temp_controller/temp_controller.cpp	Sat Sep 29 06:53:19 2018 +0000
@@ -23,6 +23,16 @@
         4 unsigned char   Max hot water temp    (default +35)
 */
 
+float current_temp[5] = {
+                    // current work temperature is maximum
+                    85, // OUTDOOR
+                    85, // LITOS
+                    85, // MEBEL
+                    85, // HOT WATER
+                    85  // BACK WATER
+                };
+
+
 float temp[5] = {
                     // initial temperature is maximum
                     85, // OUTDOOR
@@ -63,6 +73,8 @@
                         DS1820(PA_6), // substitute PA_6 with actual mbed pin name connected to the HOT WATER
                         DS1820(PA_5)  // substitute PA_6 with actual mbed pin name connected to the HOT WATER
                     };
+                    
+int error_count = 0;            // counts temp sensor errors 
                         
 unsigned char working_mode = 1; // default mode after powerup is ECO
                                 // 0 - OFF - heating off, pomp and heater are OFF
@@ -110,14 +122,24 @@
        __disable_irq();
        
        for ( int j=0; j < 5; j++ ) {
-            temp_error[j] = ds1820[j].read(temp[j]); // read temperature from DS1820 and perform cyclic redundancy check (CRC)
-            error_flag += temp_error[j];
+            temp_error[j] = ds1820[j].read(current_temp[j]); // read temperature from DS1820 and perform cyclic redundancy check (CRC)
+            if ( temp_error[j] == 0 ) {
+                temp[j] = current_temp[j];
+            } else {
+                error_flag++;  
+            };
             ds1820[j].startConversion();            // start temperature conversion from analog to digital before next reading
         };        
         
         if (error_flag > 0 && ( working_mode==1 || working_mode==2 ) ){
-            // set EMERGENCY mode - pomp and heater are ON if sensors are bad
-            working_mode = 6;
+            error_count++;
+            if ( error_count > 10 ) {
+                // if sensor reading error repeats more than 10 times - EMERGENCY MODE
+                working_mode = 6;
+            };
+        } else if ( error_flag == 0 ) {
+            // if all sensors are readable set no errors
+            error_count = 0;
         };