Sonoff BasicR2

Smart Switch
Sonoff BasicR2

WiFi smart switch based on ESP8285, widely used in the open-source home automation community. Easily flashable with Tasmota or ESPHome for local-only smart home control without cloud dependency.

ESP828580KB1MBWiFi 802.11 b/g/n

HeishaMon Communication PCB

Communication Pcb
HeishaMon Communication PCB

Open-source ESP-based communication PCB for local monitoring and control of Panasonic Aquarea heat pumps via MQTT and HTTP, with Home Assistant integration and S0 energy metering support.

ESP8266EX80KB4MBWiFi 802.11 b/g/nEthernet 10/100 Mbps (W5500, large board only)
~$20View

Wemos D1 Mini (ESP8266)

Dev Board
Wemos D1 Mini (ESP8266)

Compact ESP8266-based WiFi development board with 4MB flash, 11 digital I/O pins, micro-USB, and a rich shield ecosystem. The most popular board for Tasmota and ESPHome DIY home automation projects.

ESP8266EX80KB SRAM4MB11 digital + 1 analog GPIOWiFi 802.11 b/g/nBLE none

Adafruit HUZZAH ESP8266 Breakout

Dev Board
Adafruit HUZZAH ESP8266 Breakout

Breadboard-friendly ESP8266 WiFi breakout at 80 MHz with 802.11 b/g/n, 9 GPIO, 3.3V logic, 500mA regulator, and pre-loaded NodeMCU firmware — Adafruit's accessible entry point to ESP8266 development.

ESP8266 Tensilica L106 @ 80 MHz80 KB4MBWiFi 802.11 b/g/n
~$10View

Adafruit Feather HUZZAH ESP8266

Dev Board
Adafruit Feather HUZZAH ESP8266

All-in-one ESP8266 WiFi Feather board at 80 MHz with 802.11 b/g/n, USB-serial (CP2104), LiPo charging, 9 GPIO, and 4MB flash — the easiest way to add WiFi to a portable battery-powered project.

ESP8266 Tensilica L106 @ 80 MHz80 KB4MBWiFi 802.11 b/g/n
~$15View

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More to explore — popular traits shared by devices with CPU Architecture: Xtensa LX106.