ESP8266 datasheet(77/117 Pages) ESPRESSIF

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ESP8266 Datasheet(PDF) 77 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.

Part #	ESP8266

Description	General Purpose Input/Output Interface (GPIO)

PDF	117 Pages

Scroll/Zoom	100%

Manufacturer	ESPRESSIF [ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.]

Direct Link	https://www.espressif.com/

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77 / 117 page

9. I2C User Guide

9.2.6. Check I2C Slave Response

bool i2c_master_checkAck(void): check slave response state.

Return value:

•

TRUE: "acknowledge" from slave

•

FALSE: "not acknowledge" from slave

Details shown below:

9.2.7. Write Data on I2C Bus

i2c_master_writeByte(uint8 wrdata): write data on I2C bus

Parameters:

1 Byte of data

9.2.8. Read Data from I2C Bus

i2c_master_readByte (void): read a byte from SPI slave.

Return value:

Read 1 Byte of data.

9.3. Demo

Please refer to IOT_Demo provided by

esp_iot_sdk, for example:

! Note:

Data at the highest place will be sent ﬁrst and that at the lowest place sent last.

Either slave address or data can be sent.

Espressif

! /!

69 104

2017.05

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