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ESP8266 development board serial port to WIFI module

ATK-ESP8266 Function description of each pin
| Name | explanation |
| vcc | Power(3.3V~5V) |
| GND | Power ground |
| TXD | The serial port sending pin of the module (TTL level, not directly connected to RS232 level!), can be connected to the RXD of the single-chip microcomputer |
| RXD | Module serial port receiving pin (TTL level, not directly connected to RS232 level!), can be connected to TXD of MCU |
| RST | Reset (active low) |
| IO-0 | Used to enter firmware burning mode, low level is burning mode, high level is running mode (default state) |
ATK-ESP8266 Functional characteristics
| Project | explanation |
| WIFI Operating mode | WIFI STA WIFI AP WIFI STA+WIFI AP |
| Wireless security | Security Mechanism : WEP/WPA-PSK/WPA2-PSK Encryption type :WEP64/WEP128/TKIP/AES |
| User configuration | AT+ instruction set, Web page Android/iOS terminal, Smart Link intelligent configuration APP |
| Serial port baud rate | 110-921600bps(The default baud rate is 115200 ) |
| TCP Client | 5PCS |
| Firmware upgrade | Local serial port, OTA remote upgrade |
ATK-ESP8266 electrical characteristics
| Project | explanation |
| vcc | 3.3~5V |
| IO Level | Voh(min)1.44V、 Vol(max)0.18V、Vih(min)1.35V、Vil(max)0.45V |
| Power consumption | When sending continuously: Average value: ~70mA, peak value: 200mA When working normally: Average: ~12mA, Peak: 200mA Standby<20OuA |



