ESP8266EX is among the most integrated WiFi chip in the industry; it integrates the antenna switches, RF balun, power amplifier, low noise receive amplifier, filters, power management modules, it requires minimal external circuitry, and the entire solution, including front-end module, is designed to occupy minimal PCB area. ESP8266EX also integrates an enhanced version of Tensilica’s L106 Diamond series 32-bit processor, with on-chip SRAM, besides the WiFi functionalities. ESP8266EX is often integrated with external sensors and other application specific devices through its GPIOs; sample codes for such applications are provided in the software development kit (SDK).
Features
- Integrated low power 32-bit MCU
- Integrated TCP/IP protocol stack
- Integrated TR switch, balun, LNA, power amplifier and matching network
- 802.11 b/g/n WiFi 2.4 GHz, support WPA/WPA2
- Support STA/AP/STA+AP operation modes
- 10-bit ADC, SDIO 2.0, (H) SPI, UART, I2C, I2S, IR Remote Control, PWM, GPIO
- Deep sleep power <10uA, Power down leakage current < 5uA
- Wake up and transmit packets in < 2ms
- Standby power consumption of < 1.0mW (DTIM3)
- +20 dBm output power in 802.11b mode
- Operating temperature range -40C ~ 125C
- FCC, CE, TELEC, WiFi Alliance, and SRRC certified
ESP8266 ESP-12 Pin Out
ESP8266 ESP-01 Pin Out
There is no difference in programming ESP-12 or ESP-01, The difference is of only the number of IOs available on the board.
Pin Definition
| Name | Type | Function |
| VCC | P | Power 3.0 ~ 3.6V |
| GND | P | Ground |
| RESET | I | External reset signal (Low voltage level: Active) |
| ADC(TOUT) | I | ADC Pin Analog Input 0 ~ 1V |
| CH_PD | I | Chip Enable. High: On, chip works properly; Low: Off, small current |
| GPIO0(FLASH) | I/O | General purpose IO, If low while reset/power on takes chip into serial programming mode |
| GPIO1(TX) | I/O | General purpose IO and Serial TXd |
| GPIO3(RX) | I/O | General purpose IO and Serial RXd |
| GPIO4 | I/O | General purpose IO |
| GPIO5 | I/O | General purpose IO |
| GPIO12 | I/O | General purpose IO |
| GPIO13 | I/O | General purpose IO |
| GPIO14 | I/O | General purpose IO |
| GPIO15(HSPI_CS) | I/O | General purpose IO, Connect this pin to ground through 1KOhm resistor to boot from internal flash. |
Note: TX1 and TX GPIO1 are internally connected, On board blue LED is also connected to this pin
Electrical Characteristics
Working Voltage: 3.3V
Maximum IO Driving Power IMAX: 12 mA
Maximum IO Voltage Level VMAX: 3.6V
Current Consumption: 100mAmp
ESPWitty Cloud Module Pin Connections
