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libraries/M5Unit-ENV/examples/UnitUnified/UnitTVOC/PlotToSerial/main/PlotToSerial.cpp

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+/*
+ * SPDX-FileCopyrightText: 2024 M5Stack Technology CO LTD
+ *
+ * SPDX-License-Identifier: MIT
+ */
+/*
+  Example using M5UnitUnified for UnitTVOC
+*/
+#include <M5Unified.h>
+#include <M5UnitUnified.h>
+#include <M5UnitUnifiedENV.h>
+#include <Wire.h>
+
+namespace {
+auto& lcd = M5.Display;
+
+m5::unit::UnitUnified Units;
+m5::unit::UnitTVOC unit;
+}  // namespace
+
+void setup()
+{
+    M5.begin();
+
+    auto pin_num_sda = M5.getPin(m5::pin_name_t::port_a_sda);
+    auto pin_num_scl = M5.getPin(m5::pin_name_t::port_a_scl);
+    M5_LOGI("getPin: SDA:%u SCL:%u", pin_num_sda, pin_num_scl);
+    Wire.end();
+    Wire.begin(pin_num_sda, pin_num_scl, 400 * 1000U);
+
+    if (!Units.add(unit, Wire) || !Units.begin()) {
+        M5_LOGE("Failed to begin");
+        lcd.clear(TFT_RED);
+        while (true) {
+            m5::utility::delay(10000);
+        }
+    }
+
+    M5_LOGI("M5UnitUnified has been begun");
+    M5_LOGI("%s", Units.debugInfo().c_str());
+    M5_LOGW("SGP30 measurement starts 15 seconds after begin");
+
+    lcd.clear(TFT_DARKGREEN);
+}
+
+void loop()
+{
+    M5.update();
+    Units.update();
+
+    // SGP30 measurement starts 15 seconds after begin.
+    if (unit.updated()) {
+        // Can be checked on serial plotters
+        M5.Log.printf("\n>CO2eq:%u\n>TVOC:%u", unit.co2eq(), unit.tvoc());
+    }
+}