E103-W20(7688)_Other_WiFi

E103-W20(7688) MT7688AN chip solution Open Wrt operating system and custom development patch type small size serial port to WiFi wireless routing module

[Chip solution]：MT7688AN

[WiFi protocol]：IEEE802.11b/g/n

[Transmission power]：20~24dBm

[MCU main frequency]：580MHz

[Communication distance]： 200m

[Product size]：34.1*18.7*2.77mm/36.1*18.7*2.7mm

[Introduction]：The E103-W20 (7688) module is a low-cost and low-power IoT module based on MediaTek MT7688AN and MT7628AN. This module leads to all interfaces of MT7688AN/MT7628AN, supports OpenWrt operating system and custom development, has rich interfaces and powerful processors, can be widely used in smart devices or cloud service applications, etc., and can be freely used for secondary development .

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No	pin name	pin type	Pin function description	function by default
1	GND	P	land	System power supply( it is recommended to increase the capacitor at the power supply end )
2	3.3VD	P	3.3V input： recommended supply current >=1000mA
3	3.3VD	P	3.3V input： recommended supply current >=1000mA
4	GND	P	land
5	SPI_CSO	IO	SPI bus chip select signal 0	undefined, please leave blank
6	REF_CLKO	LO	Reference clock output	undefined, please leave blank
7	PERST_N	I/O	PCIe device reset output	Undefined, please leave it in the air, cannot be pulled down
8	WDT_RST_ N	I/O	watchdog timeout reset
9	EPHY_LED 4	I/O	PORT4 LED active low	LAN4 network port light
10	EPHY_LED 3	IO	PORT3 LED active low	LAN3 network port light
11	EPHY_LED 2	I/O	PORT2 LED active low	LAN2 network port light
12	EPHY_LED 1	I/O	PORT1 LED active low	LANI network port light
13	EPHY_LED 0	I/O	PORTO LED active low	WAN port light
14	PORT_N	LO	CPU reset, active low	Reset input, please leave it open
15	UART_TXD 1	O	Serial port 1 data transmission	Serial port 1 output: please leave it in the air if it is not used, and cannot be pulled down
16	UART_RXD 1	I	Serial port 1 data reception	Serial port 1 input, please leave it in the air
17	I2S_SDI	LO	12 S data input	undefined： please leave blank
18	I2S_SDO	I/O	12 S data output	Undefined, please leave it in the air, cannot be pulled up
19	I2S_WS	IO	I2S channel selection, 0: left: 1: right	undefined： please leave blank
20	I2S_CLK	LO	I2S data bit clock	undefined, please leave blank
21	GND	P	land	ground
22	ANT	P	Antenna RF interface, not connected by default	If you need to connect this pin: you need to remove the antenna base and replace it with a 0 ohm resistor
23	GND	P	land	ground
24	I2C_SCLK	IO	I2C bus clock	undefined, please leave blank
25	I2C_SD	IO	I2C bus data	undefined, please leave blank
26	SPI_CS1	IO	SPI chip select signal 1	undefined, please leave blank
27	SPI_CLK	I/O	SPI clock signal	Undefined, please leave it in the air, cannot be pulled up
28	spi_Nnso	I/O	SPI bus data master input slave output	Undefined, please leave it in the air, cannot be pulled down
29	SPI_MOSI	I/O	SPI bus data master out slave in	Undefined, please leave it in the air, cannot be pulled up
30	GPIOO	I/O	General purpose input and output interface	undefined, please leave blank
31	UART_TXD 0	O	Serial port 0 data output	Serial port 0 output, please leave it in the air, do not pull up
32	UART_RXD 0	I	Serial 0 data input	Serial port 0 input, please leave it in the air
33	WLED_N	I/O	WIFI LED： active low	When there is a WIFI signal, the WIFI LED flashes and can be left floating
34	MDI_RP_PO	IO	PORTO network signal receiving positive	WAN port, please leave it empty
35	MDI_RN_P 0	I/O	PORTO network signal receive negative
36	NIDI_TP_PO	IO	PORTO network signal sending is positive
37	MDI_TN_P 0	I/O	PORTO network signal sending negative
38	NIDI_TP_P1	I/O	PORTO network signal sending is positive	LANI port： please leave it empty
39	MDI_TN_P 1	I/O	PORT1 network signal sending negative
40	MDI_RP_P1	IO	PORT1 network signal receiving positive
41	MDI_RN_P 1	I/O	PORT1 network signal receive negative
42	MDI_RP_P2	I/O	PORT2 network signal reception is positive	LAN2 port： please leave it empty
43	MDI_RN_P 2	I/O	PORT2 network signal receive negative
44	NIDI_TP_P2	I/O	PORT2 network signal sending is positive
45	MDI_TN_P 2	I/O	PORT2 network signal send negative
46	IDI_TP_P3	I/O	PORT3 network signal sending is positive	LAN3 port： please leave it empty
47	MDI_TN_P 3	I/O	PORT3 network signal send negative
48	MDI_RP_P3	I/O	PORT3 network signal reception is positive
49	MDI_RN_P 3	I/O	PORT3 network signal receive negative
50	MDI_RP_P4	I/O	PORT4 network signal reception is positive	LAN4 port： please leave it empty
51	MDI_RN_P 4	I/O	PORT4 network signal receive negative
52	N1DI_TP_P4	I/O	PORT4 network signal sending is positive
53	MDI_TN_P 4	I/O	PORT4 network signal send negative
54	USB_DP	IO	USB data positive	undefined, please leave blank
55	USB_DM	LO	USB data negative	undefined, please leave blank
56	GND	P	land	ground
Note: l.I-input; O-output; LO-digital LO; P-power. IO port drive current 8mA. 2. The LED light on the module is the status indicator light, which should be developed by the user to determine the LED indicator status.