M5Unit-INFRARED/examples/UnitUnified/UnitTmosPIR/PlotToSerial/main/PlotToSerial.cpp

/*
 * SPDX-FileCopyrightText: 2025 M5Stack Technology CO LTD
 *
 * SPDX-License-Identifier: MIT
 */
/*
  Example using M5UnitUnified for UnitTmosPIR
*/
#include <M5Unified.h>
#include <M5UnitUnified.h>
#include <M5UnitUnifiedINFRARED.h>
#include <M5Utility.h>
#include <M5HAL.hpp>  // For NessoN1

using namespace m5::unit::sths34pf80;

namespace {
auto& lcd = M5.Display;
m5::unit::UnitUnified Units;
m5::unit::UnitTmosPIR unit;
};  // namespace

void setup()
{
    M5.begin();
    M5.setTouchButtonHeightByRatio(100);

    // The screen shall be in landscape mode
    if (lcd.height() > lcd.width()) {
        lcd.setRotation(1);
    }

    auto board = M5.getBoard();

    // NessoN1: Arduino Wire (I2C_NUM_0) cannot be used for GROVE port.
    //   Wire is used by M5Unified In_I2C for internal devices (IOExpander etc.).
    //   Wire1 exists but is reserved for HatPort — cannot be used for GROVE.
    //   Reconfiguring Wire to GROVE pins breaks In_I2C, causing ESP_ERR_INVALID_STATE in M5.update().
    //   Solution: Use SoftwareI2C via M5HAL (bit-banging) for the GROVE port.
    // NanoC6: Wire.begin() on GROVE pins conflicts with m5::I2C_Class registered by Ex_I2C.setPort()
    //   on the same I2C_NUM_0, causing sporadic NACK errors.
    //   Solution: Use M5.Ex_I2C (m5::I2C_Class) directly instead of Arduino Wire.
    bool unit_ready{};
    if (board == m5::board_t::board_ArduinoNessoN1) {
        // NessoN1: GROVE is on port_b (GPIO 5/4), not port_a (which maps to Wire pins 8/10)
        auto pin_num_sda = M5.getPin(m5::pin_name_t::port_b_out);
        auto pin_num_scl = M5.getPin(m5::pin_name_t::port_b_in);
        M5_LOGI("getPin(M5HAL): SDA:%u SCL:%u", pin_num_sda, pin_num_scl);
        m5::hal::bus::I2CBusConfig i2c_cfg;
        i2c_cfg.pin_sda = m5::hal::gpio::getPin(pin_num_sda);
        i2c_cfg.pin_scl = m5::hal::gpio::getPin(pin_num_scl);
        auto i2c_bus    = m5::hal::bus::i2c::getBus(i2c_cfg);
        M5_LOGI("Bus:%d", i2c_bus.has_value());
        unit_ready = Units.add(unit, i2c_bus ? i2c_bus.value() : nullptr) && Units.begin();
    } else if (board == m5::board_t::board_M5NanoC6) {
        // NanoC6: Use M5.Ex_I2C (m5::I2C_Class, not Arduino Wire)
        M5_LOGI("Using M5.Ex_I2C");
        unit_ready = Units.add(unit, M5.Ex_I2C) && Units.begin();
    } else {
        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);
        unit_ready = Units.add(unit, Wire) && Units.begin();
    }
    if (!unit_ready) {
        M5_LOGE("Failed to begin");
        lcd.fillScreen(TFT_RED);
        while (true) {
            m5::utility::delay(10000);
        }
    }

    M5_LOGI("M5UnitUnified initialized");
    M5_LOGI("%s", Units.debugInfo().c_str());
    lcd.fillScreen(TFT_DARKGREEN);
}

void loop()
{
    M5.update();
    Units.update();

    // Periodic
    if (unit.updated()) {
        auto d = unit.oldest();
        M5.Log.printf(">Object:%.2f\n>Ambient:%.2f\n>CompObj:%.2f\n", d.objectTemperature(), d.ambientTemperature(),
                      d.compensatedObjectTemperature());
        M5.Log.printf(">Presence:%d\n>Motion:%d\n>AmbientShock:%d\n", d.presence(), d.motion(), d.ambient_shock());
        M5.Log.printf(">isPresence:%u\n>isMotion:%u\n>isShock:%u\n", d.isPresence(), d.isMotion(), d.isAmbientShock());
    }

    // Toggle single <-> periodic
    if (M5.BtnA.wasClicked()) {
        static bool single{};
        single = !single;

        if (single) {
            unit.stopPeriodicMeasurement();
            Data d{};
            if (unit.measureSingleshot(d, AmbientTemperatureAverage::Samples8, ObjectTemperatureAverage::Samples128)) {
                M5.Speaker.tone(3000, 30);
                M5.Log.printf("Single:\n");
                M5.Log.printf("Object:%.2f/%d Ambient:%.2f/%d CompObj:%.2f/%d\n", d.objectTemperature(), d.object(),
                              d.ambientTemperature(), d.ambient(), d.compensatedObjectTemperature(),
                              d.compensated_object());
            }
        } else {
            M5.Speaker.tone(4000, 20);
            auto cfg = unit.config();
            unit.writeAverageTrim(cfg.avg_t, cfg.avg_tmos);
            unit.startPeriodicMeasurement(cfg.mode, cfg.odr, cfg.comp_type, cfg.abs);
        }
    }

    // Reset
    if (M5.BtnA.wasHold()) {
        M5.Speaker.tone(2000, 30);
        unit.stopPeriodicMeasurement();
        unit.softReset();
        M5.Speaker.tone(2000, 30);
        auto cfg = unit.config();
        unit.writeAverageTrim(cfg.avg_t, cfg.avg_tmos);
        unit.startPeriodicMeasurement(cfg.mode, cfg.odr, cfg.comp_type, cfg.abs);
    }
}