Features:

1. Adopt dual-core Xtensa®32-bit LX6 MCU. Integrated SPI flash 3.32Mbit\ SRAM 520KB
2. Support TCP Server, TCP Client, UDP Server, UDP Client working mode.
3. Support the four data ports of serial port, wif. Ethernet and Bluetooth-compatible-compatible to be combined in pairs, and the data is transparently transmitted.
4. Support to connect to the network through wired network or wifi to upgrade the firmware.
5. Support wifi to connect to the Internet or LAN through a router, establish a TCP/UDP connection, and access the user's designated server.
6. Support wired network access.
7. Support user secondary development.
8. Industrial grade operating temperature range: -40-+85.
9. Serial port baud rate: 80-5000000.
10. Network protocol: IPv4, TCP/UDP.
11. Software encryption: AES/RSA/ECC/SHA

Pin description:

Table-1 Debugging and programming interface

Pin Name Description

1. EN1 reserved debugging and programming interface; enabled, high level is effective
2. GND Reserved debugging and programming interface; GND
3. 3V3 reserved debugging and programming interface; 3V3
4. TXD reserved debugging programming interface; IO1, TXD0
5. RXD reserved debugging programming interface; IO3, RXD0
6. IO0 is reserved for debugging and programming interface; IO0

Module IO description

1. EN1 enable, active high
2. CFG IO32, CFG
3. 485_EN IO33, RS485 enable pin
4. RXD IO35, RXD2
5. TXD IO17, TXD2
6. GND GND
7. 3V32 3V3 power supply
8. GND GND
9. 5V2 5V power supply
10. LINK network connection indicator pin
11. GND GND
12. IO393 IO39, only supports input
13. IO363 IO36, only supports input
14. IO15 IO15
15. I014 IO14
16. IO12 IO12
17. IO5 IO5
18. IO4 IO4
19. IO2 IO2
20. GND GND

Note 1: The module enables high level by default.

Note 2: You can only choose one of 3V3 power supply and 5V power supply! ! !

Note 3: IO39 and IO36 only support input.

Power supply characteristics:

Supply voltage:

The power supply voltage of the module can be 5V or 3V3, and only one of the two can be selected.

Power supply mode:

Users can freely choose according to their needs:

1) Through hole (welding header):

Use DuPont line connection for power supply;

Use breadboard connection for power supply;

2) Half pad (directly soldered to the board): the user board provides power.

Instructions for use:

1-Power-on instructions:

If the DuPont line is used: find the 3V3 or 5V power input port, connect the corresponding voltage, the indicator light (LED1) lights up, indicating that the electric success.

2-Indicator light description:

• LED1: power indicator, power on normally, the light is on;
• LED3: serial port indicator light, when RXD2 (IO35) has data flow, the light is on;
• LED4: serial port indicator light, when TXD2 (IO17) has data stream, the light is on;

3-There are three ways to use, users can choose according to their needs:

1. Through hole (welding pin header): use DuPont wire to connect;
2. Through hole (welding header): put it on the breadboard for use;
3. Half pad: Users can directly solder the module on their own board.

4-Description of network port working indicator:

• Green light: Connection status indicator When connected to the network correctly, the green light is on.
• Yellow light: data indicator flashes when the module receives or sends data, including the module receives a network broadcast packet.