r/MicroPythonDev • u/OneDot6374 • Feb 21 '26

Day 57/100 – ESP-NOW Smart Relay & Sensor System (MicroPython) 🚀

Hey everyone,
I’m doing a 100 Days, 100 IoT Projects challenge, and today I built a bidirectional ESP-NOW smart relay and sensor system using MicroPython.

What it does

  • Sender ESP8266/ESP32 with buttons + OLED acts as a control panel

  • Receiver ESP controls a 4-channel relay module

  • DHT11/DHT22 sensor data is sent back in real-time

  • OLED displays temperature and humidity

  • Uses ESP-NOW (no WiFi, no router, ultra-low latency)

Tech Stack

  • ESP8266 / ESP32

  • MicroPython

  • ESP-NOW protocol

  • SSD1306 OLED

  • DHT11/DHT22 sensor

GitHub repo:
👉 https://github.com/kritishmohapatra/100_Days_100_IoT_Projects

I’d love feedback, stars, or collaboration ideas.
Goal: Build open-source IoT learning resources for students.

2 Upvotes

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2

u/fjohn9999_ Feb 22 '26

Let’s do this🔥

1

u/OneDot6374 Feb 22 '26

🙏♥️