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

I have never worked with an ESP8266 but after a few hours of research I decided to give it a try. It took almost a day to figure out how to connect via serial port and send AT commands. After finishing this part, I knew I had a few more hours to spend on the Arduino IDE programming examples, and I was ready to start the real work. I already have more ideas than WLAN modules. So far I've killed one of the 5 volt modules but if the others hold up I'll be sure to order more in the future.