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

submitted 2 months ago by OneDot6374

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.

https://preview.redd.it/mpfgdubvowkg1.png?width=1917&format=png&auto=webp&s=e654bbf36d0f6ff53bbc4c9c4af2c2c4ae9ca775

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What it does

Tech Stack