Review on 📡 Makerfocus ESP8266 ESP-01S WiFi Serial Transceiver Module (4pcs) with 1MB Flash for Arduino - Enhanced Connectivity and Storage by Janet Harris

These small boards are well suited for projects that require small physical size and low power consumption. And they easily connect to sensors like the DHT11 or DHT22. I also used them to drive WS2812B RGB LEDs. I've ordered 2 sets so far with no problems. A NOTICE. If you're ordering this as your first attempt at programming the ESP8266, you'll need a few more parts - a breakout board, a 3.3V USB serial port board, a breadboard, and some wire (22ga). To blink them you need a circuit with some switches or jumpers.