Hardware and Software

Hardware 

    ESP01

Software 

    Arduino IDE

Sanki Notes

• 

  
  

• ESP8266EX pin definition

  PIN	NAME	TYPE	FUNCTION
  1	VDDA	P	Analog Power 3.0 ~3.6V
  2	LNA	I/O	RF Antenna Interface,Chip Output Impedance=50 Ω No matching required but we recommend that the π- type matching network is retained.
  3	VDD3P3	P	Amplifier Power 3.0~3.6V
  4	VDD3P3	P	Amplifier Power 3.0~3.6V
  5	VDD_RTC	P	NC(1.1V)
  6	TOUT	I	ADC Pin
  7	CHIP_EN	I	Chip Enable. High: On, chip works properly; Low: Off, small current
  8	XPD_DCDC	I/O	Deep-Sleep Wakeup;GPIO16
  9	MTMS	I/O	GPIO14; HSPICLK
  10	MTDI	I/O	GPIO12;HSPIQ
  11	VDDPST	P	Digital/IO Power Supply (1.8V~3.3V)
  12	MTCK	I/O	GPIO13;HSPID
  13	MTDO	I/O	GPIO15;HSPICS
  14	GPIO2	I/O	UART Tx during flash progamming; GPIO2
  15	GPIO0	I/O	GPIO0;SPICS2
  16	GPIO4	I/O	GPIO4
  17	VDDPST	P	Digital/IO Power Supply (1.8V~3.3V)
  18	SDIO_DATA_2	I/O	Connect to SD_D2 (Series R 200Ω);SPIHD; HSPIHD
  19	SDIO_DATA_3	I/O	Connect to SD_D3 (Series R 200Ω); SPIWP; HSPIWP
  20	SDIO_CMD	I/O	Connect to SD_CMD(Series R 200Ω); SPICS0
  21	SDIO_CLK	I/O	Connect to SD_CLK (Series R 200Ω); SPICLK
  22	SDIO_DATA_0	I/O	Connect to SD_D0 (Series R 200Ω); SPIQ
  23	SDIO_DATA_1	I/O	Connect to SD_D1 (Series R 200Ω); SPID
  24	GPIO5	I/O	GPIO5
  25	U0RXD	I/O	UART Rx during flash progamming; GPIO3
  26	U0TXD	I/O	UART Tx during flash progamming; GPIO1; SPICS1
  27	XTAL_OUT	I/O	Connect to crystal output, can be used to provide BT clock input
  28	XTAL_IN	I/O	Connect to crystal input
  29	VDDD	P	Analog Power 3.0~3.6V
  30	VDDA	P	Analog Power 3.0~3.6V
  31	RES12K	I	Connect to series R 12kΩ to ground
  32	EXT_RSTB	I	External reset signal (Low: Active)

  Note: GPIO2, GPIO0, MTDO can be configurable as 3-bit SDIO mod

Examples