Add Internet to your next project with an adorable, bite-sized WiFi microcontroller, at a price you like! The ESP8266 processor from Espressif is an 80 MHz microcontroller with a full WiFi front-end (both as client and access point) and TCP/IP stack with DNS support as well. While this chip has been very popular, its also been very difficult to use. Most of the low cost modules are not breadboard friendly, don’t have an onboard 500mA 3.3V regulator or level shifting, and aren’t CE or FCC emitter certified.
One breakout at the end has an “FTDI” pinout so you can plug in an FTDI or console cable to upload software and read/write debugging information via the UART. When you’re done with your coding, remove the cable, and this little module can be embeded into your project box.
Each module comes pre-loaded with NodeMCU’s Lua interpreter (NodeMCU 0.9.5 build 20150318 / Lua 5.1.4 to be specific), you can run commands, and ‘save’ Lua programs directly to the module’s Flash using a USB-Serial converter cable. But, if you’d like, you can skip Lua and go direct to using the Arduino IDE. Once you download the ESP8266 core, you can treat it just like a microcontroller+WiFi board, no other processors needed!
- Grove 4-pin connector (RX,TX,VCC,GND)
- 802.11 b/g/n protocol (2.4GHz)
- WiFi Direct (P2P), soft-AP
- Supports three modes: AP, STA and AP+STA coexistence mode
- Integrated TCP/IP protocol stack
- LwIP (lightweight IP)
- Integrated low power 32-bit CPU could be reprogrammed as an application processor
- Integrated temperature sensor
- Serial UART Interface
- Multi-queue QoS management
- Wake up and transmit packets in < 2ms
- Metal shielding
- Onboard ceramic antenna
- Reset switch