Features:
Fully compatible with the original electrical interface and physical interface for the serial transparent Bluetooth.
Built-in the industrial transparent transmission firmware V3.0 with stability and reliability by using the Web Configuration.
Built-in the high performance WiFi module ESP-M2.

Support serial AT command.

Support re-programmable, OTA firmware update.
Seamless transparent transmission between serial and WiFi.

Built-in HTTP Web Server, support configure parameters by web page.
WiFi supports three modes: AP, STA, AP + STA.

Support re-connect automatically at WiFi STA mode and TCP Client.
Support set baud rate, data bit, parity check, stop bits, and/or subcontracting time;
Support baud rate (bps): 300/600/1200/2400/4800/9600/19200/38400/57600/74800/115200/230400/460800/921600/1843200/3686400.

Support AP enable, self-defined SSID/password, self-defined IP and network segment.
Automatically scan the peripheral WiFi hotspot, support STA enable, DHCP, self-defined IP and network segment.
Support TCP Server, TCP Client, UDP Server, UDP Client and UDP local broadcast.
Support DNS resolution automatically for the remote sever address.
Support checking the status by AT command.
Provide IO4 to show the WiFi status.
application insmart home, wireless data connection and transparent transmission, smart car control, wireless serial printer, LED light industrial control etc.

Specifications:
size: 34mm x 17mm x 4mm/1.34 x 0.67 x 0.16inch

Voltage: 4.5V~6.0V
TTL voltage: 3.3V (compatible with 5.0V)
Provided pins: STATE, TXD, RXD, EN
Average current: 80mA; when data sent, it is 170mA; but it is 20μA at deep sleep mode
Working temperature: -40℃-125℃

Package Included:
1 x WiFi Serial Port TTL to WiFi module