Wireless module NodeMcu v3 CH340 Lua WIFI Internet of Things development board ESP8266 with pcb Antenna and usb port for Arduino
D1 Mini ESP-12 With 0.96 oled
1.Have good brush the latest firmware , on the computer can be used
2.ESP8266 all IO mouth lead, direct download without having to reset
3. All open source hardware and software
Tips: choose the same channel, and will pay less freight.