Close the i2c connection.

Factory method for creating a i2c_rdwr_ioctl_data struct that can be called with ``ioctl(fd, I2C_RDWR, data)``. :param i2c_m

Set i2c slave address to use for subsequent calls. :param address: :type address: int :param force: :type fo

FIXME

FIXME - simulate reading, only used for testing purposes

get buyer information from card returns a dictionary buyer object

return a raw reading value as an array of bytes

read from its own address a given-length of block data

Prepares an i2c write transaction. :param address: Slave address. :type address: int :param buf: Bytes to write. Eit

construct frame for communicating between host controller and pn532

get item information from tag returns an item dictionary

get items from tags returns an array of item dictionaries

create a sale of items returns a sale dictionary

Prepares an i2c read transaction. :param address: Slave address. :type: address: int :param length: Number of bytes

Read a single byte from a designated register. :param i2c_addr: i2c address :type i2c_addr: int :param register: Reg

Read a block of byte data from a given register. :param i2c_addr: i2c address :type i2c_addr: int :param register: S

Read a single word (2 bytes) from a given register. :param i2c_addr: i2c address :type i2c_addr: int :param register

FIXME - simulate setup, only used for testing purposes

write to its own address with given block data

Returns a 32-bit value stating supported I2C functions. :rtype: int

add buyer name, email and card returns True

adds an item to the DB (for admin) returns true if successful

check if the card exists in the db

check if an item is in stock (admin)

create a charge and return its id

edits an item in the DB (for admin) returns true if successful

get all the held items (items that aren't in stock, and aren't sold) returns an array of item dictionaries

get item information from index returns an item dictionary

get all the sold items returns an array of item dictionaries

get all in stock items returns an array of item dictionaries

removes an item from stock but doesn't delete it (for admin) returns true if successful

Combine a series of i2c read and write operations in a single transaction (with repeated start bits but no stop bits in between).

send InListPassiveTarget command

return charnge status whether is is paid or not

Open a given i2c bus. :param bus: i2c bus number (e.g. 0 or 1) :type bus: int

send SAMConfiguration command

add sale_index to item returns a boolean

add sale_index to items returns a boolean

FIXME

moves an item to stock (for admin) returns true if successful

use debug logging

keep reading for nfc tag item, validate, send it back to the ui

Write a block of byte data to a given register. :param i2c_addr: i2c address :type i2c_addr: int :param register: St

Initialize and (optionally) open an i2c bus connection. :param bus: i2c bus number (e.g. 0 or 1). If not given, a subsequent

:param auto_cleanup: Close bus when leaving scope. :type auto_cleanup: Boolean :param force: Force using the slave address ev

Executes a SMBus Block Process Call, sending a variable-size data block and receiving another variable-size response :param i2c_addr

check if the sale has been paid

get stripe account balance

get stripe balance history

return a charnge

get a list of charges

get sale information for a given index returns a sale dictionary

get unpaid sales returns an array of sale dictionaries

Executes a SMBus Process Call, sending a 16-bit value and receiving a 16-bit response :param i2c_addr: i2c address :type i2c

return the card reading value as an integer format

Read a block of up to 32-bytes from a given register. :param i2c_addr: i2c address :type i2c_addr: int :param regist

Read a single byte from a device. :rtype: int :param i2c_addr: i2c address :type i2c_addr: int :param force:

send invoice

set data pin to input pin

setup the device