🌱 I Built a Plant Sensor That Tells Me When to Water It (ESP32) скачать в хорошем качестве

🌱 I Built a Plant Sensor That Tells Me When to Water It (ESP32)

In this video, we build a *clean, intentional ESP32-based plant sensor that measures soil moisture, ambient light, temperature*, and *humidity*, and provides immediate human feedback using an *RGB LED ring*. When the plant needs water, the LED shows a warning color — and when we add water, it turns green, confirming the plant is happy again 🌱 This video focuses purely on the hardware foundation: • Parts selection • Circuit design • ESP32 firmware • Real-world plant testing Under the hood, the firmware also publishes all sensor readings over *MQTT*, laying the groundwork for future automation and AI — which we’ll explore in a later video. ⸻ ESP32 SMART PLANT SENSOR — PARTS LIST (All components used in this build) ESP32 Microcontroller ESP32-WROOM-32E development module https://amzn.to/3N9yHER Breadboard (Prototype Build) Full-size solderless breadboard https://amzn.to/4jvf9Xk Soil Moisture Sensor Capacitive soil moisture sensor (analog output) https://amzn.to/4spTR1s Temperature & Humidity Sensor DHT22 digital temperature + humidity sensor https://amzn.to/3N652fM Ambient Light Sensor (I²C) BH1750 digital light sensor https://amzn.to/4pvZicq RGB Status Indicator 16 × WS2812B RGB LED ring https://amzn.to/45MmOed Logic Level Shifter (LED Data) SN74AHCT125N (3.3V → 5V) https://amzn.to/45828NI USB-C Power Breakout USB-C breakout board https://amzn.to/4jvXUVU Hook-Up Wire 22 AWG solid-core wire (breadboard-friendly) https://amzn.to/3Nb00i4 Some links may be affiliate links. They help support the channel at no extra cost to you. ⸻ ESP32 PLANT SENSOR — WIRING REFERENCE All connections assume a standard ESP32 DevKit (ESP32-WROOM-32E) ⸻ POWER CONNECTIONS ESP32 • 5V / VIN → Power input (USB or regulated 5V) • GND → Common ground RGB LED Ring • 5V → 5V supply • GND → Shared ground with ESP32 ⸻ RGB LED RING (WS2812B) • DIN → GPIO 5 • 5V → 5V supply (add 1000 µF capacitor across 5V/GND) • GND → Shared ground • 330–470 Ω resistor between ESP32 and DIN (recommended) Note: The LED ring is mounted *vertically*, with LEDs facing outward for human feedback. ⸻ TEMPERATURE & HUMIDITY SENSOR (DHT22) • VCC → 3.3V (do NOT use 5V) • DATA → GPIO 15 • GND → Ground • 10 kΩ pull-up resistor between DATA and 3.3V ⸻ AMBIENT LIGHT SENSOR (BH1750 – I²C) • VCC → 3.3V • GND → Ground • SDA → GPIO 21 • SCL → GPIO 22 Important: BH1750 must be exposed to ambient light (do not recess behind plastic). ⸻ SOIL MOISTURE SENSOR (CAPACITIVE) • VCC → 3.3V • GND → Ground • AOUT → GPIO 34 Note: GPIO 34–39 are input-only and ideal for analog sensors. ⸻ MQTT / FUTURE EXPANSION • Sensor readings are published as JSON over MQTT • Transport: Wi-Fi • No hardware changes required for future AI integration ⸻ QUICK PIN SUMMARY RGB LED Data → GPIO 5 Temp / Humidity → GPIO 15 Light Sensor SDA → GPIO 21 Light Sensor SCL → GPIO 22 Soil Moisture → GPIO 34 Power → 5V / 3.3V Ground → GND ⸻ This is the first step toward a calm, extensible environmental sensing system — built intentionally, not rushed. #ESP32 #IoT #SmartPlant #MQTT #Electronics #DIY #STEM #PlantCare #EmbeddedSystems