2 layers169 × 87 mm
Thermostat v2
ANTzacalie/termo-pro-esp32
Full-featured smart thermostat built on the ESP32 platform.
26 parts1CERN-OHL-P-2.0
2 layers59.9 × 99.7 mm
Office Automation
theaparnaprabhu/Applied-ProjectsApplied, hands-on projects that go beyond quick learning exercises — real builds combining hardware, firmware, and design.
- Size
- 59.9 × 99.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 31
- Nets
- 41
- Pads
- 104
- Tracks, vias
- 145, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Aug 2026
- Updated
- 11 Aug 2026
Overview
Office Automation is an open-source printed circuit board by theaparnaprabhu, from the theaparnaprabhu/Applied-Projects repository on GitHub. It is a 2-layer board of 59.9 × 99.7 mm with 31 parts on 41 nets, routed with 145 tracks and 0 vias.
It is built around the DHT11, PN2222A and SS14. Its parts include 8 resistors, 4 diodes, 2 capacitors, 2 transistors and 2 switches. It belongs with the ESP32 boards of this library.
Main components
3
DHT11
SIP-4-20℃~+60℃ 1mA 3.3V~5.5V 5%RH~95%RH ±2℃ ±5%RH SIP-4 Temperature and Humidity Sensor ROHSAosong ElecTemperature And Humidity Sensor
PN2222A
TO-92-3-55℃~+150℃ 1 NPN 1A 300MHz 300mV 40V 625mW NPN TO-92-3 Bipolar (BJT) ROHSNTE ElectronicsBipolar (BJT)
SS14
SMA(DO-214AC)-55℃~+150℃ 1A 25A 300uA@40V 40V 550mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
README
Smart-Office-Automation/README.mdSmart Office Automation PCB
A custom ESP32-based PCB that automates office environment control — lighting, temperature monitoring, and occupancy detection — with a web dashboard for real-time monitoring and control.
Features
- Occupancy Detection — Automatically detects when the office is in use (e.g. via PIR/motion sensor)
- Lighting Control — Automatically switches lighting based on occupancy and/or ambient light levels using LDR
- Temperature Monitoring — Reads and logs ambient temperature in real time using DHT11 sensor
- Web Dashboard — Live monitoring and manual override via a browser-based interface
- ESP32-Powered — Wi-Fi enabled, no external gateway or hub required
Hardware
| Component | Details |
|---|---|
| MCU | ESP32 |
| Sensors | Temperature sensor, occupancy/PIR sensor |
| Actuators | Relay/MOSFET-driven lighting output |
| PCB Design Tool | KiCad |
Firmware
Written in C/C++ using the Arduino/ESP-IDF framework. Handles:
- Sensor polling (temperature, occupancy)
- Lighting control logic
- Wi-Fi connectivity and web server hosting for the dashboard
Web Dashboard
The ESP32 hosts a lightweight web dashboard accessible over the local network, showing:
- Current temperature
- Occupancy status (occupied / vacant)
- Lighting state (on/off, and manual override toggle)
Getting Started
Hardware Setup
- Fabricate the PCB using the files provided
- Solder components per the BOM
- Power the board via [power source]
Accessing the Dashboard
- After flashing and powering on, the ESP32 starts broadcasting a Wi-Fi network
- On your phone or laptop, connect to this Wi-Fi network
- Open a browser and navigate to the ESP32's AP IP address (default:
192.168.4.1) - The dashboard loads, showing live sensor data and controls
- Options for Auto mode and Manual mode are provided in the dashboard for efficient functioning
Parts
31| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R11, R14 |
| 2 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9, R10 |
| 2 | 1N4007 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D3, D5 |
| 2 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R13 |
| 2 | PN2222A | Package_TO_SOT_THT:TO-92_Inline | Q2, Q4 |
| 2 | SANYOU_SRD_Form_C | Relay_THT:Relay_SPDT_SANYOU_SRD_Series_Form_C | K1, K3 |
| 1 | 100nF 50V | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C2 |
| 1 | 100uF 25V | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C1 |
| 1 | 470 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | DHT11 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | DHT11 |
| 1 | ESP32-DEVKIT-V1 | ESP32-DEVKIT-V1:MODULE_ESP32_DEVKIT_V1 | U1 |
| 1 | FAN_BTN | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | Fan |
| 1 | LIGHT_BTN | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | Light |
| 1 | OLED | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | OLED |
| 1 | PIR | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | PIR |
| 1 | PWR_LED | LED_THT:LED_D5.0mm | D2 |
| 1 | Power | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2_1x02_P5.00mm_Horizontal | Power |
| 1 | R_Photo | OptoDevice:R_LDR_4.9x4.2mm_P2.54mm_Vertical | R8 |
| 1 | Relay1 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-3_1x03_P5.00mm_Horizontal | Relay_1 |
| 1 | Relay2 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal | Relay_2 |
| 1 | SS14 | Diode_SMD:D_SMA | D1 |
The 27 most common of 31 parts.
Questions
How big is the Office Automation PCB?
It measures 59.9 × 99.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Office Automation use?
31 parts, built around the DHT11, PN2222A and SS14. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Office Automation KiCad files?
From the theaparnaprabhu/Applied-Projects repository on GitHub, at the commit this page was made from: the board is Smart-Office-Automation/Office_Automation.kicad_pcb and its schematic Smart-Office-Automation/ESP32.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Office Automation design in my own project?
Its repository states no licence, so its author keeps all rights: ask theaparnaprabhu before reusing the design.
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