Eratta

It was recently found that all of the JSON strings used for Uptick Tickets were representing numbers as hexadecimal values. These are malformed json strings and work is under way to correct the issue. The plan is to make a sketch that will search for the malformed json strings and correct them and update the EEPROM on the Ticket. If you need specific details contact tech.support@pontech.com.

Ticket ID Format

Data format of I2C EEPROM which stores Ticket Maker, Version, and Configuration.

Byte number	Description	Example
8	Short SHA of JSON Header stored as ASCII string	de9f2c74
200*	JSON Header, null terminated and padded	{“org”:“pontech.com”,“cn”:“Drive Ticket”,“rev”:“A”, …}
48	User Data	User Defined

* max, null padded

Required Fields
org, cn, rev

Protected Fields
io, label

Examples

Base Format

{"org":"pontech.com","cn":"Drive Ticket","rev":"1.0",...}

ISO Ticket

48828561{"org":"pontech.com","cn":"ISO Common Cathode Ticket","rev":"A","io":31}
7f134a21{"org":"pontech.com","cn":"ISO Common Anode Ticket","rev":"A","io":31}

Drive Ticket

63fe830a{"org":"pontech.com","cn":"Super Sink Drive Ticket","rev":"A","io":0}

Full Example

{“org”:“Prolinear/Pontech Inc.”,“cn”:“Drive Ticket”,“rev”:1.0,“email”:“support@pontech.com”,“io”:0x00,“label”:[“step”,“dir”,“en”,“sleep”,“ms3”]}

Useful links

json spec

web based json validator

sha1 checker

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