HYTCTL(8)

NAME
hytctl - read or set HYT 221/271/939 device EEPROM values

SYNOPSIS
hytctl [-d] gpio-device gpio-pin#|name i2c-device i2c-address eeprom-address [new-eeprom-value]

DESCRIPTION
The hytctl command will read out a value at a given EEPROM address and can optionally set the value at this address. The main usage is setting a new I2C-address of the device via EEPROM address 0x1C.

To access the EEPROM of the HYT devices the CM mode is used. This mode can only be entered within 10ms after device power-up. Thus a GPIO pin must be attached to Vdd on the device in order to be able to control the device power. Communication is done normally via the I2C-bus.

The options are as follows:

-d  Enable debug output.

RETURN VALUES

AUTHORS
Frank Kardel