From 4a93e78c14003b4d0bcf2fc97e91b8f6eed36b97 Mon Sep 17 00:00:00 2001
From: Rajko Zschiegner <ricki_z@gmx.de>
Date: Fri, 29 Mar 2024 21:53:55 +0100
Subject: [PATCH] first parts of SCD30 calibration

---
 airrohr-firmware/airrohr-cfg.h.py     |  1 +
 airrohr-firmware/airrohr-firmware.ino | 35 ++++++++++++++++++++++++++-
 airrohr-firmware/defines.h            |  1 +
 3 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/airrohr-firmware/airrohr-cfg.h.py b/airrohr-firmware/airrohr-cfg.h.py
index a5afd39c..42dfbef2 100755
--- a/airrohr-firmware/airrohr-cfg.h.py
+++ b/airrohr-firmware/airrohr-cfg.h.py
@@ -29,6 +29,7 @@
 String		dnms_correction
 String		temp_correction
 String		height_above_sealevel
+String		last_calibration_scd30
 Bool		gps_read
 Bool		send2dusti
 Bool		ssl_dusti
diff --git a/airrohr-firmware/airrohr-firmware.ino b/airrohr-firmware/airrohr-firmware.ino
index 0ee7fd1f..47ed95e4 100644
--- a/airrohr-firmware/airrohr-firmware.ino
+++ b/airrohr-firmware/airrohr-firmware.ino
@@ -173,9 +173,10 @@ namespace cfg
 	bool sps30_read = SPS30_READ;
 	bool bmp_read = BMP_READ;
 	bool bmx280_read = BMX280_READ;
-	char height_above_sealevel[8] = "0";
+	char height_above_sealevel[LEN_HEIGHT_ABOVE_SEALEVEL] = "0";
 	bool sht3x_read = SHT3X_READ;
 	bool scd30_read = SCD30_READ;
+	char last_calibration_scd30[LEN_LAST_CALIBRATION_SCD30] = "";
 	bool ds18b20_read = DS18B20_READ;
 	bool dnms_read = DNMS_READ;
 	char dnms_correction[LEN_DNMS_CORRECTION] = DNMS_CORRECTION;
@@ -622,6 +623,10 @@ unsigned long SPS30_read_error_counter = 0;
 unsigned long SPS30_read_timer = 0;
 bool sps30_init_failed = false;
 
+bool scd30_calibration = 0;
+unsigned long scd30_start_cal = 0;
+unsigned long scd30_last_val_change = 0;
+
 float last_value_PPD_P1 = -1.0;
 float last_value_PPD_P2 = -1.0;
 float last_value_SDS_P1 = -1.0;
@@ -2523,6 +2528,11 @@ static void webserver_status()
 		add_table_row_from_value(page_content, F("SCD30 measurement interval"), String(settingVal));
 		scd30.getTemperatureOffset(&settingVal);
 		add_table_row_from_value(page_content, F("SCD30 temperature offset"), String(settingVal));
+		if (scd30_calibration) {
+			add_table_row_from_value(page_content, F("SCD30 calibration running since",  delayToString(millis() - scd30_start_cal));
+		} else {
+			add_table_row_from_value(page_content, F("SCD30 last calibration"), cfg::last_calibration_scd30);
+		}
 	}
 
 	page_content += FPSTR(EMPTY_ROW);
@@ -2765,6 +2775,29 @@ static void webserver_reset()
 	end_html_page(page_content);
 }
 
+/*****************************************************************
+ * Webserver start SCD30 calibration                             *
+ *****************************************************************/
+static void webserver_scd30_calib() {
+	if (!webserver_request_auth())
+	{ return; }
+
+	String page_content;
+	page_content.reserve(512);
+
+	start_html_page(page_content, FPSTR(INTL_SCD30_CALIBRATION));
+	debug_outln_info(F("ws: start SCD30 calibration..."));
+
+	page_content += FPSTR(WEB_SCD30_CALIBRATION_CONTENT);
+
+	if (! scd30_calibration) {
+		scd30_calibration = true;
+		scd30_start_cal = millis();
+	}
+
+	end_html_page(page_content);
+}
+
 /*****************************************************************
  * Webserver data.json                                           *
  *****************************************************************/
diff --git a/airrohr-firmware/defines.h b/airrohr-firmware/defines.h
index 8294be79..40dc37a3 100644
--- a/airrohr-firmware/defines.h
+++ b/airrohr-firmware/defines.h
@@ -22,6 +22,7 @@
 #define LEN_DNMS_CORRECTION 8
 #define LEN_TEMP_CORRECTION 8
 #define LEN_HEIGHT_ABOVE_SEALEVEL 8
+#define LEN_LAST_CALIBRATION_SCD30 20
 
 #define LEN_SENSEBOXID 30