Basic regulation algorithm + some fixes

main.c

@@ -8,6 +8,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <xc.h>
+#include <pic12f1572.h>
 
 // Configuration bits
 #pragma config FOSC = INTOSC    // Oscillator Selection bits (INTOSC oscillator: I/O function on CLKIN pin)
@@ -24,8 +25,8 @@
 // Pins define
 #define DHT22_PIN_DIR TRISAbits.TRISA4
 #define DHT22_DATA PORTAbits.RA4
-#define CTRL_1 PORTAbits.RA5
+#define CTRL_1 PORTAbits.RA5 // Water heating - 7x27Ohm = 6.5W
-#define CTRL_2 PORTAbits.RA2
+#define CTRL_2 PORTAbits.RA2 // Air heating   - 10x100Ohm = 2.5W
 
 // Clock frequency (used for __delay_xx)
 #define _XTAL_FREQ 8000000
@@ -42,11 +43,12 @@ int readDHT() {
     }
     
     // Wait for an old payload eventually aborted to end (lasts about 4ms)
-    __delay_ms(5);
+    __delay_ms(100);
 
     // Sends the start signal: low for at least 1ms, then high for 20 to 40us
+    LATAbits.LATA4 = 0; // LATA4?should stay at 0, but it gets back to 1 idk why.
     DHT22_PIN_DIR = 0; // configure as output, then set it as 0 (= LATAbits.LATA4).
-    __delay_ms(2);
+    __delay_ms(20);
     DHT22_PIN_DIR = 1; // configure as input, then set it as 1 (through pullup).
     __delay_us(40);
     
@@ -60,9 +62,7 @@ int readDHT() {
     for (uint8_t n = 0; n < 5; n++) {
         for (int8_t i = 7; i >= 0; i--) {
             waitDHTOrRet(1); // Wait for up
-            CTRL_1 = 1;
             waitDHTOrRet(0); // Wait for low. Waited time is TMR0.
-            CTRL_1 = 0;
 
             if (TMR0 > 50) { // Low: 26-28us  High: 70us
                 dhtBytes[n] |= 1 << i;
@@ -95,6 +95,25 @@ int fetchClimate(int8_t* humidity, int8_t* temperature) {
     return 0;
 }
 
+#define __delay_s(s) {uint8_t __delay_s_i = (s); while(__delay_s_i > 0){ __delay_s_i--; __delay_ms(1000); }}
+
+void heat1(uint8_t rate) {
+    CTRL_1 = 1;
+    uint8_t delay_on = rate / 16; // Total elapsed time is 16s
+    __delay_s(delay_on);
+    CTRL_1 = 0;
+    uint8_t delay_off = 16 - rate/16;
+    __delay_s(delay_off);
+}
+void heat2(uint8_t rate) {
+    CTRL_2 = 1;
+    uint8_t delay_on = rate / 4; // Total elapsed time is 32s
+    __delay_s(delay_on);
+    CTRL_2 = 0;
+    uint8_t delay_off = 32 - rate/4;
+    __delay_s(delay_off);
+}
+
 void main() {
     // 8MHz internal clock
     OSCCON = 0b01110000;
@@ -104,22 +123,58 @@ void main() {
     ANSELA = 0b00000011; // Declare used pins as digital I/O (bit = 0)
     WPUA = 0b00010000; // Active la résistance de pull-up sur RA4
     LATAbits.LATA4 = 0; // Declare RA4 output value as 0 (only effective when DHT22_PIN_DIR = 0)
-
+    CTRL_1 = 0;
+    CTRL_2 = 0;
+    APFCONbits.T1GSEL = 1; // Prevent T1G function to be assigned to RA4.
+    
     // Timer 0 config
     OPTION_REGbits.PSA = 0; // Enable prescaler
     OPTION_REGbits.PS = 0b000; // 1/2 prescaler
     OPTION_REGbits.TMR0CS = 0; // Use internal clock
     OPTION_REGbits.TMR0SE = 0; // Increment on rising edge
     
+    // PWM config
+//    PWM2CON = 0b00000000; // Module enable - Output enable - Output state 0 (off) - Output active state is high - Standard PWM mode
+//    PWM2CLKCON = 0b01110000; // - Divide source clock by 128 -> 62500Hz - - FOSC clock source
+//    PWM2PRH = 0xff; // Count to 65535 -> 1Hz full loop
+//    PWM2PRL = 0xff;
+//    PWM2PHH = 0; // No phase count
+//    PWM2PHL = 0;
+//    PWM2OFH = 0; // No offset
+//    PWM2OFL = 0;
+//    PWM2DCH = 0; // Comparator set to 0 -> always off
+//    PWM2DCL = 0;
+//    APFCONbits.P1SEL = 1; // PWM1 on RA5
+    // PWM is not working.
+    
+    // Target (except from nov. to feb.: 15°):
+    // temp = 24 to 28°
+    // hum = 60 to 80%
+    int8_t hum_target = ((int8_t) 80);
+    int8_t temp_target = ((int8_t) 30);
     
     while (1) {
         int8_t hum = 0;
         int8_t temp = 0;
         
         int is_error = fetchClimate(&hum, &temp);
+        __delay_ms(100);
         if(is_error){
-            __delay_ms(5000);
+            // Reconfigure DHT as output to clean it up at 0v
+//            DHT22_PIN_DIR = 0;
+//            LATAbits.LATA4 = 0;
+            LATAbits.LATA4 = 0;
+            __delay_ms(1000);
+        }else{
+            if(hum < hum_target){
+                heat1(128);
+            }else if(temp < temp_target){
+                heat2(128);
+            }else {
+                __delay_ms(5000);
+            }
         }
-        __delay_ms(200);
+//        PWM2DCH = 128; // 50% power
+//        PWM2DCL = 128; // 50% power
     }
 }

nbproject/Makefile-genesis.properties

@@ -1,11 +1,11 @@
 #
-#Mon Jul 14 17:21:30 CEST 2025
+#Tue Jul 22 22:58:06 CEST 2025
 default.languagetoolchain.version=3.00
 default.Pack.dfplocation=/Applications/microchip/mplabx/v6.20/packs/Microchip/PIC12-16F1xxx_DFP/1.7.242
 conf.ids=default
 default.languagetoolchain.dir=/Applications/microchip/xc8/v3.00/bin
 host.id=25fg-hcwv-jy
-configurations-xml=9fb44f5d96dce8dab3ba2eb3b9104ff9
+configurations-xml=5faac1ea7a32d072accfd4e5449880c6
 default.com-microchip-mplab-mdbcore-PICKit3Tool-PICkit3DbgToolManager.md5=5b9902b017a30efdeb77dee75a1e4e51
 com-microchip-mplab-nbide-embedded-makeproject-MakeProject.md5=f612087c95360c842296d189edfe3321
 default.com-microchip-mplab-nbide-toolchain-xc8-XC8LanguageToolchain.md5=bf89cdcdd6c0a49174fe4b605ef2b42d

nbproject/configurations.xml

@@ -172,7 +172,7 @@
                   value="${memories.instruction.ram.ranges}"/>
         <property key="memories.programmemory" value="true"/>
         <property key="memories.programmemory.ranges" value="0-3ff"/>
-        <property key="poweroptions.powerenable" value="true"/>
+        <property key="poweroptions.powerenable" value="false"/>
         <property key="programmertogo.imagename" value=""/>
         <property key="programoptions.donoteraseauxmem" value="false"/>
         <property key="programoptions.eraseb4program" value="true"/>
@@ -220,7 +220,7 @@
                   value="${memories.instruction.ram.ranges}"/>
         <property key="memories.programmemory" value="true"/>
         <property key="memories.programmemory.ranges" value="0-3ff"/>
-        <property key="poweroptions.powerenable" value="true"/>
+        <property key="poweroptions.powerenable" value="false"/>
         <property key="programmertogo.imagename" value=""/>
         <property key="programoptions.donoteraseauxmem" value="false"/>
         <property key="programoptions.eraseb4program" value="true"/>