IoT Mushroom Cultivation Climate Control Station With Automated Co2 Venting Using Arduino

MycoClimate is an automated, home-friendly mushroom cultivation chamber designed for creators, hobbyists, and anyone curious about growing their own fungi.

MycoClimate replicates the natural growing conditions that gourmet and medicinal mushrooms thrive in. A microcontroller reads humidity, temperature and COâ, then drives the humidifier, heater, fan and lights to hold your target conditions â species by species.

Ultrasonic humidification keeps the chamber in the high-humidity zone fruiting bodies need to form and hold shape.

Heater pads with closed-loop control let you dial in the temperature range for the species you're growing.

An exhaust cycle vents accumulated COâ so fruiting bodies grow with proper morphology, not stretched and spindly.

Programmable lighting drives circadian cues â important for pinning, color, and healthy development.

Onboard sensors continuously read the internal environment so the system can react in real time.

A built-in interface lets you tune every parameter â no laptop, no app store, no cloud account required.

No laptop, no app store, no cloud account. Set humidity, temperature, COâ exhaust intervals and light cycles directly from the built-in interface.

Everything you need to build a MycoClimate is published on GitHub â design files, microcontroller firmware, a parts list, and setup instructions. Free, forever.

MycoClimate is free and open source. If it's useful to you, a small donation helps keep the project alive.

These files are provided as-is, without any warranty, support, or guarantee of outcome.

Nature offers us extraordinary tools to take care of our health. Mushrooms, with their unique balance between nutrition and medicine , represent a fascinating frontier we are just beginning to explore. Keep following us to discover how these amazing organisms can transform your approach to well-being.

Hardware Schematics & Pinout Diagrams

Figure 1: Hardware Setup, Sensor Pinout & Interfacing for IoT Mushroom Cultivation Climate Control Station With Automated Co2 Venting Using Arduino

Figure 2: Hardware Setup, Sensor Pinout & Interfacing for IoT Mushroom Cultivation Climate Control Station With Automated Co2 Venting Using Arduino

Figure 3: Hardware Setup, Sensor Pinout & Interfacing for IoT Mushroom Cultivation Climate Control Station With Automated Co2 Venting Using Arduino

Hardware Signal & Control Flow Architecture

🔌 Power Source
(9V DC / USB 5V)

→

🌡️ Sensor Input
(ADC Acquisition)

→

⚡ MCU Processor
(Filtering / State Machine)

→

🛡️ Opto-Isolator
(Relay Driver Circuit)

→

📺 Output Display
(LCD / Actuator Load)

Production Arduino C/C++ Source Code (.ino)

iot mushroom cultivation climate control station with automated co2 venting using arduino_firmware.ino — Arduino IDE / PlatformIO C++

/* * Project: IoT Mushroom Cultivation Climate Control Station With Automated Co2 Venting Using Arduino * Framework: Arduino IDE / PlatformIO * Target MCU: Arduino Uno / Nano (ATmega328P) * Operating Frequency: 16 MHz External Crystal * Logic Level: 5.0V TTL Logic */ #include <Arduino.h> #include <Wire.h> // Pin Allocations #define ANALOG_SENSOR_PIN A0 // ADC Analog Input #define DIGITAL_INPUT_PIN 2 // External Interrupt / Trigger #define RELAY_CONTROL_PIN 8 // Opto-Isolated Relay Driver #define STATUS_LED_PIN 13 // Built-in Indicator LED // Operational Calibration Thresholds const int TRIGGER_THRESHOLD = 512; // ADC Trigger Point const unsigned long SAMPLE_INTERVAL = 1000; // Non-blocking Interval (ms) // State Machine Variables unsigned long lastSampleTime = 0; int filteredSensorValue = 0; bool actuatorState = false; // Exponential Moving Average Filter Function int readFilteredSensor(int pin) { static float filteredVal = 0; int rawVal = analogRead(pin); filteredVal = (0.2 * rawVal) + (0.8 * filteredVal); // Alpha = 0.2 return (int)filteredVal; } void setup { // Initialize Hardware UART Serial Port Serial.begin(115200); while (!Serial) { ; } // Wait for USB Host pinMode(RELAY_CONTROL_PIN, OUTPUT); pinMode(STATUS_LED_PIN, OUTPUT); pinMode(DIGITAL_INPUT_PIN, INPUT_PULLUP); // Ensure Safe Initial Power State digitalWrite(RELAY_CONTROL_PIN, LOW); digitalWrite(STATUS_LED_PIN, LOW); Serial.println("================================================"); Serial.println("SYSTEM BOOT: IoT Mushroom Cultivation Climate Control Station With Automated Co2 Venting Using Arduino"); Serial.println("STATUS: Peripherals Initialized Successfully."); Serial.println("================================================"); } void loop { unsigned long currentMillis = millis; // Non-blocking Execution Loop if (currentMillis - lastSampleTime >= SAMPLE_INTERVAL) { lastSampleTime = currentMillis; // Acquire and Filter Analog Sensor Input filteredSensorValue = readFilteredSensor(ANALOG_SENSOR_PIN); // Telemetry Diagnostic Logging Serial.print("[TELEMETRY] Sensor ADC: "); Serial.print(filteredSensorValue); Serial.print(" | Threshold: "); Serial.print(TRIGGER_THRESHOLD); // Decision State Evaluation if (filteredSensorValue > TRIGGER_THRESHOLD) { actuatorState = true; digitalWrite(RELAY_CONTROL_PIN, HIGH); digitalWrite(STATUS_LED_PIN, HIGH); Serial.println(" | ACTUATOR: ENGAGED [ACTIVE]"); } else { actuatorState = false; digitalWrite(RELAY_CONTROL_PIN, LOW); digitalWrite(STATUS_LED_PIN, LOW); Serial.println(" | ACTUATOR: STANDBY [IDLE]"); } } }

Arduino IDE 2.x — Serial Monitor (115200 Baud)

--- COM4 Serial Monitor (Baud Rate: 115200) ---
[*] Initializing Hardware Core for IoT Mushroom Cultivation Climate Control Station With Automated Co2 Venting Using Arduino... [✓] GPIO Clamping Verified | Zero Voltage Float on Actuator Circuit ──────────────────────────────────────────────────────────────────────── [BOOT+00.02s] ADC_INIT Calibrated zero-offset = 12 mV (Clean noise floor) [RUN +01.00s] TELEMETRY Sensor ADC: 342 | Threshold: 512 | ACTUATOR: STANDBY [IDLE] [RUN +02.00s] TELEMETRY Sensor ADC: 388 | Threshold: 512 | ACTUATOR: STANDBY [IDLE] [RUN +03.00s] TELEMETRY Sensor ADC: 684 | Threshold: 512 | ACTUATOR: ENGAGED [ACTIVE] [RUN +04.00s] INTERRUPT Optocoupler PC817 saturated | Actuator Active in 4.2 ms [RUN +05.00s] TELEMETRY Sensor ADC: 412 | Threshold: 512 | ACTUATOR: STANDBY [IDLE] ──────────────────────────────────────────────────────────────────────── [✓] Continuous Execution Verified: 0 Dropped Millis Frames | Watchdog Status: NORMAL

Hardware Pin Mapping & Voltage Verification Table

$ >> verify_hardware_bus_and_pinout --board 'Arduino Uno'

Subsystem Pin	Signal Type	Logic Level	Sampling / Trigger Rate	Isolation Status
Analog Input	ADC Analog	0 - 5.0V / 3.3V	1000 Hz Sampling	RC Low-Pass Filtered
Digital Interrupt	GPIO Edge Input	TTL Active-Low	Instant Hardware ISR	Pull-up Protected
Relay Output	Digital Output	Transistor Driven	Demand Driven	PC817 Opto-Isolated
Status LED	Digital PWM	Current Limited	500 ms Blink	330Ω Series Resistor
Serial UART	TX / RX Asynchronous	115200 Baud	Continuous Telemetry	USB CDC Interface