For a few cents more than the ESP12F you get it with a programmer daughter board, a RGB led, a button and a photoresistor.This is ideal for small robot with networking abilities.Can be programmed with Arduino IDE as a NodeMCU v1.0 .
This is a companion discussion topic for the original entry at https://community.robotshop.com/blog/show/an-even-cheaper-wi-fi-board
Can you post a link to the specific module you found? Do you have any experience with distance and or antenna with the ESP?
I use ESP8266 from 6 months
I use ESP8266 from 6 months now, the antenna has 40m in open air, 20m typical home. More info later.
Yes, they are them. I ordered 2 from Aliexpress and currently playing with one of these. The coolest part is that they are useful even without adding any parts, the worst is that you have to unplug it to link it to other sensors. I scrapped Witty firmware to make a webserver, and use dyndns and port forwarding to get my cloud.