initial commit

include/csv_logger.h

@@ -0,0 +1,58 @@
+#pragma once
+
+#include <Arduino.h>
+#include "config.h"
+#include "thermal_controller.h"
+
+struct SensorReading {
+  float temperatureC = NAN;
+  float humidityPct = NAN;
+  bool valid = false;
+};
+
+void printCsvHeader() {
+  Serial.println(
+      F("csv_hdr,ms,target_c,avg_c,min_c,max_c,spread_c,heatlim_pct,heater_pct,fan_pct,"
+        "cutoff,failsafe,ch2_t,ch2_h,ch3_t,ch3_h,ch4_t,ch4_h,ch5_t,ch5_h"));
+}
+
+inline void printCsvField(float value, uint8_t decimals) { Serial.print(value, decimals); }
+
+void printCsvRow(uint32_t nowMs, const ThermalController &thermal, const SensorReading *sensors,
+                 uint8_t sensorCount, float avgTemp, float minTemp, float maxTemp) {
+  Serial.print(F("csv,"));
+  Serial.print(nowMs);
+  Serial.print(',');
+  Serial.print(thermal.target(), 1);
+  Serial.print(',');
+  printCsvField(avgTemp, 2);
+  Serial.print(',');
+  printCsvField(minTemp, 2);
+  Serial.print(',');
+  printCsvField(maxTemp, 2);
+  Serial.print(',');
+  printCsvField(thermal.cornerSpread(), 2);
+  Serial.print(',');
+  Serial.print(thermal.heaterAllowance(), 0);
+  Serial.print(',');
+  printCsvField(thermal.heaterDutyPercent(), 1);
+  Serial.print(',');
+  Serial.print((thermal.fanPwm() * 100) / 255);
+  Serial.print(',');
+  Serial.print(thermal.isCutoffActive() ? 1 : 0);
+  Serial.print(',');
+  Serial.print(thermal.isFailSafeActive() ? 1 : 0);
+
+  for (uint8_t i = 0; i < sensorCount; ++i) {
+    Serial.print(',');
+    if (sensors[i].valid) {
+      printCsvField(sensors[i].temperatureC, 2);
+      Serial.print(',');
+      printCsvField(sensors[i].humidityPct, 1);
+    } else {
+      Serial.print(',');
+    }
+  }
+
+  Serial.println();
+}