Pico W: send email alerts over SMTP
Send email straight from a Pico W over SMTP with STARTTLS in MicroPython. Works with your own mail server or any provider's app password, no cloud IoT service in the middle.
Tag
#wifi
20 tutorials
ESP32: assign a static IP and reserve it in the router
Give an ESP32 a fixed IP with WiFi.config(), reserve it in your router with a DHCP reservation, and stop hunting the network for a device that moved.
Pico W: set a static IP for a reliable local device
Give a Pico W a fixed IP address with MicroPython so bookmarks, port forwards, and automations keep working after the router reboots.
ESP32: HTTP server in depth, routing, JSON APIs, and async handlers
Build a real HTTP API on the ESP32. Route by path, handle GET vs POST, parse JSON bodies, serve JSON responses, and use async handlers when the request rate goes up.
ESP32: TLS in depth, root CAs, and validating real certificates
Move past setInsecure() and the WiFiClientSecure default that ships in every HTTPS example. Bundle root CAs, validate chains, and pin fingerprints on the ESP32.
ESP32: TCP sockets in depth, the protocol your MQTT rides on
Every packet your ESP32 sends over WiFi goes through a TCP socket. Three-way handshake, WiFiClient, WiFiServer, the stuck connection gotcha, TCP_NODELAY.
ESP32: WebSocket server, the right protocol for live dashboards
Build a WebSocket server on the ESP32 with ESPAsyncWebServer. Push sensor readings to a browser at 10 Hz without polling, with the ping/pong heartbeat that keeps the connection alive.
Pico W: async web server with uasyncio, the modern pattern
Serve a real async web API from a Pico W using uasyncio, with background sensor tasks and non-blocking request handlers. The right way after the synchronous server gets too small.
Pico W: Bluetooth Low Energy peripheral with MicroPython and aioble
Turn a Pico W into a BLE peripheral that a phone can connect to over Bluetooth Low Energy, with a GATT service, read, write, and notify characteristics.
ESP32: send HTTPS requests with root CA validation
Make the ESP32 talk to real APIs over HTTPS, with proper TLS validation. The right way to send sensor data to a cloud service.
ESP32: set up a captive portal for Wi-Fi configuration
Make the ESP32 broadcast its own Wi-Fi network and serve a configuration page. The right pattern for projects that need Wi-Fi credentials but have no keyboard.
ESP32: build a weather station that logs to Wi-Fi
A complete weather station: BME280 over I2C, ESP32 web server, deep sleep between readings. Battery-powered, weatherproof case, web dashboard.
ESP32: build a Wi-Fi doorbell that pushes to your phone
Press a button, get a notification on your phone. The ESP32 + Pushover (or Telegram) + a simple button. Replaces a $50 smart doorbell.
Pico W: publish MQTT messages from MicroPython over Wi-Fi
Connect a Pico W to Wi-Fi and publish sensor readings to an MQTT broker from MicroPython. The pico equivalent of the ESP32 MQTT tutorial.
Pico W: serve a live sensor dashboard over Wi-Fi
Read a DHT22 or BME280 and serve a live dashboard from a Pico W. The smallest, cheapest way to put a sensor reading on your phone's browser.
ESP32: OTA (over-the-air) firmware updates
Update ESP32 firmware over Wi-Fi without plugging in USB. The feature that turns a project from prototype into something you actually deploy.
ESP32: connect to Wi-Fi and stay connected
The minimum code to bring up Wi-Fi on an ESP32, with reconnect logic and the most common reasons it silently fails.
ESP32: publish MQTT messages to a broker
Send sensor data over MQTT from an ESP32 to a broker, and subscribe from another device. The pub/sub pattern that runs most home automation.
ESP32: serve a sensor dashboard from the chip itself
Turn your ESP32 into a tiny web server that shows live sensor readings on any phone or laptop on the same Wi-Fi. No cloud, no app.
Pico W: serve a web page from the chip over Wi-Fi
Connect the Pico W to Wi-Fi and serve an HTML page from the chip. The smallest useful web server on a $6 microcontroller.