Post Occupancy Device Schematic

I found the project is view-only for your account, so I can’t modify the schematic directly here. I’ll still assemble a concrete schematic architecture and component set you can copy into an editable project or ask the owner to grant edit access.
I can’t create the schematic in this project because your account currently has view-only access; Flux blocked the edit attempt.
Recommended schematic architecture:
  • MCU / Python-capable control: ESP32-WROOM-32E running MicroPython or CircuitPython-style firmware
  • Luminance: VEML7700 or BH1750, I2C, 3.3 V
  • CO2 + temperature + humidity: Sensirion SCD41, I2C, 3.3 V
  • Motion / occupancy: PIR module with 3.3 V digital output; if using a raw PIR element, it needs analog front-end conditioning
  • Noise: INMP441 or ICS-43434 I2S MEMS microphone, 3.3 V
  • Shared bus: I2C for light + CO2/temp/humidity sensors with one pair of 4.7 kΩ pull-ups to 3.3 V
  • Enclosure requirement: optical window for luminance, vented airflow path for CO2/temp/humidity, Fresnel/dome opening for PIR, acoustic port for microphone, and ESP32 antenna kept near a non-metallic edge
To proceed, ask the project owner jr98 to grant you edit access, or duplicate/fork the project into your own workspace. Once editable, I can add the sensors, wire the schematic, add decoupling/pull-ups, and create a Python firmware starter file.
Choose exact parts
Create wiring plan
Draft MicroPython code
Plan enclosure layout
SL1
UART0_RX
U1
Manufacturer Part Number
AP2112K-3.3TRG1
SW2
ESP32_EN
UART0_TX
UART0_RX
+3.3V
BOOST_EN
+3.3V
ESP32_EN
ESP32_RX2
RTS
ESP32_EN
UART0_TX
IO0
ESP32/I2C_SCL
+3.3V
ESP32/I2C_SDA
SW1
ESP32_TX2
VBAT
+3.3V
Note 1
Line 1
Sensor MH-19
Line 2
Intelligent Infrared CO2 Module
Line 3
------------------------------------------------------------
Line 4
https://www.winsen-sensor.com/d/files/PDF/Infrared%20Gas%20Sensor/NDIR%20CO2%20SENSOR/MH-Z19%20CO2%20Ver1.0.pdf
J1
DTR
ESP32/I2C_SCL
+3.3V
Note 2
Line 2
Sensor VEML6075
Line 3
UV Light Sensor
Line 4
-----------------------------------------------------------
Line 5
https://www.sparkfun.com/products/15089
+3.3V
LED1
U2
J3
DTR
ESP32/I2C_SDA
BOOST_EN
C1
Capacitance
1uF
VBOOST
ESP32_RX2
J2
R4
Resistance
10KΩ
+3.3V
IO0
VBAT
J5
ESP32_TX2
ESP32/I2C_SCL
R1
Resistance
1KΩ
IO0
RTS
ESP32/I2C_SDA
R3
Resistance
10KΩ
C2
Capacitance
1uF
VBOOST
Q3
Manufacturer Part Number
BSS138
Q2
Manufacturer Part Number
BSS138
J6


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ENVIRONMENTAL EXPOSURE RISK METER

ENVIRONMENTAL EXPOSURE RISK METER thumbnail
Environmental exposure risk measuring device based on ESP32, ultraviolet light (UV) and CO2 gas sensor modules. It has a voltage booster based on MT3608 chip and a solar panel lithium battery charger with MPPT based on CN3791 chip.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$0.46–$0.79

Digi-Key

$1.53–$9.74

LCSC

$6.21–$6.31

Mouser

$0.60

Verical

$0.35–$0.65

Controls