esp32-c6-environmental-logger

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ESP32-C6 Environmental Sensor Station & Data Logger

An open-source, 4-layer IoT environmental monitoring station and telemetry data logger powered by the ESP32-C6-WROOM-1 microcontroller. This board utilizes multi-protocol wireless connectivity (Wi-Fi 6, BLE 5, and Zigbee/Thread) to read atmospheric and gas sensors, display local telemetry, and securely back up data to a local MicroSD card.

🛠 Core Features & Hardware

1. Processor & Wireless Connectivity

MCU: ESP32-C6-WROOM-1
Programming/Debugging: On-board dual-purpose interfaces for flashing and debugging via a protected USB-C 2.0 interface.

2. Comprehensive Sensor Array

SCD41-D-R2: Photoacoustic $CO_2$ sensor measuring true carbon dioxide levels in ppm ($I^2C$ Address: 0x62).
SGP41-D-R4: Digital gas sensor providing multi-pixel MOx sensing for VOC (Volatile Organic Compounds) and $NO_x$ (Nitrogen Oxides) indoor environmental indexes ($I^2C$ Address: 0x59).
HDC2033: Low-power, high-accuracy digital temperature and relative humidity sensor ($I^2C$ Address: 0x44).

3. Storage & User Interface

MicroSD Card Slot: Dedicated SPI-driven logging interface with individual inline trace damping resistors and pull-ups for secure local data logging.
OLED Display (SSD1306): 0.96" $I^2C$ graphic display panel for live visual terminal outputs and local troubleshooting ($I^2C$ Address: 0x3C).

4. Power & Battery Management

Charging: TP4056 lithium battery management IC with automated charge/discharging indicator LEDs.
Power Path Switching: Automated hardware power routing utilizing an AO3401A P-Channel MOSFET to seamlessly switch between USB power and Battery power.
Regulator: AP2112K-3.3V Ultra-low dropout, low-noise LDO regulator supplying clean $3.3\text{V}$ power rails up to $600\text{mA}$ to the wireless MCU and sensors.

5. Push Button Switch

Reset switch A button with ESD protection to reset the MCU

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ESP32-C6 Environmental Sensor Station & Data Logger

🛠 Core Features & Hardware

1. Processor & Wireless Connectivity

MCU: ESP32-C6-WROOM-1

Programming/Debugging: On-board dual-purpose interfaces for flashing and debugging via a protected USB-C 2.0 interface.

2. Comprehensive Sensor Array

SCD41-D-R2: Photoacoustic $CO_2$ sensor measuring true carbon dioxide levels in ppm ($I^2C$ Address: 0x62).

SGP41-D-R4: Digital gas sensor providing multi-pixel MOx sensing for VOC (Volatile Organic Compounds) and $NO_x$ (Nitrogen Oxides) indoor environmental indexes ($I^2C$ Address: 0x59).

HDC2033: Low-power, high-accuracy digital temperature and relative humidity sensor ($I^2C$ Address: 0x44).

3. Storage & User Interface

MicroSD Card Slot: Dedicated SPI-driven logging interface with individual inline trace damping resistors and pull-ups for secure local data logging.

OLED Display (SSD1306): 0.96" $I^2C$ graphic display panel for live visual terminal outputs and local troubleshooting ($I^2C$ Address: 0x3C).

4. Power & Battery Management

Charging: TP4056 lithium battery management IC with automated charge/discharging indicator LEDs.

Power Path Switching: Automated hardware power routing utilizing an AO3401A P-Channel MOSFET to seamlessly switch between USB power and Battery power.

Regulator: AP2112K-3.3V Ultra-low dropout, low-noise LDO regulator supplying clean $3.3\text{V}$ power rails up to $600\text{mA}$ to the wireless MCU and sensors.

5. Push Button Switch

Reset switch A button with ESD protection to reset the MCU

esp32-c6-environmental-logger

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ESP32-C6 Environmental Sensor Station & Data Logger

🛠 Core Features & Hardware

1. Processor & Wireless Connectivity

2. Comprehensive Sensor Array

3. Storage & User Interface

4. Power & Battery Management

5. Push Button Switch

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ESP32-C6 Environmental Sensor Station & Data Logger

🛠 Core Features & Hardware

1. Processor & Wireless Connectivity

2. Comprehensive Sensor Array

3. Storage & User Interface

4. Power & Battery Management

5. Push Button Switch

5. I2C and UART Pin Connector

🎛 4-Layer PCB Stackup Architecture