ETEKCITY ESN00 Packets

Parses & serializes packets to and from the format that ESN00 sends and understands.

Implemented Packet Types:

SET_UNIT (0xc0) - c5736b4, - #2
SET_TARE (0xc1) - #2
SET_AUTO_OFF (0xc4) - 805a076, #2
MEASUREMENT (0xd0) - bfcf5df
UNIT_STATE (0xd1) - #5
TARE_STATE (0xd3) - bfcf5df, #3
AUTO_OFF_STATE (0xd5) - #2
ERROR_STATE (0xe0) - bfcf5df, #3
ITEM_STATE (0xe4) - bfcf5df, #3

SET_NUTRITION (0xc2)
?PING (0xc3)
??? (0xd2)
?PONG (0xd4)
??? (0xe1)
??? (0xe2)
??? (0xe3)

All packets have this structure

Device will be constantly spamming packet with this data

Field	Description	Note
Sign	`0x00` (positive) / `0x01` (negative)
Weight	16 bit int (big-endian)	In grams value is multiplied by 10 (not sure about other units)
Unit	`0x00`(g),`0x02`(ml),`0x04`(ml milk),`0x03`(floz),`0x05`(floz milk),`0x06`(oz),`0x01`(lboz)	Does not seem like bitmask just enum
Stable	`0x00` (measuring) / `0x01` (settled)	`0x00` means weight is not yet settled

bytes (incl.)	field	unit (decimal size)	values
`[0, 2]`	`calories`	`Kcal` (5, 1)	`0x0` - `0xf423f` `0.0` - `99999.9`
`[3, 5]`	`caloriesFromFat`	`Kcal` (5, 1)	`0x0` - `0xf423f` `0.0` - `99999.9`
`[6, 8]`	`totalFat`	`g` (4, 1)	`0x0` - `0x1869e` `0.0` - `9999.9`
`[9, 11]`	`stauratedFat`	`g` (4, 1)	`0x0` - `0x1869e` `0.0` - `9999.9`
`[12, 14]`	`transFat`	`g` (4, 1)	`0x0` - `0x1869e` `0.0` - `9999.9`
`[15, 17]`	`cholesterol`	`mg` (4, 1)	`0x0` - `0x1869e` `0.0` - `9999.9`
`[18, 20]`	`sodium`	`mg` (4, 1)	`0x0` - `0x1869e` `0.0` - `9999.9`
`[21, 23]`	`potassium`	`mg` (4, 1)	`0x0` - `0x1869e` `0.0` - `9999.9`
`[24, 26]`	`totalCarbs`	`g` (4, 1)	`0x0` - `0x1869e` `0.0` - `9999.9`
`[27, 29]`	`dietaryFiber`	`g` (4, 1)	`0x0` - `0x1869e` `0.0` - `9999.9`
`[30, 32]`	`sugars`	`g` (4, 1)	`0x0` - `0x1869e` `0.0` - `9999.9`
`[33, 35]`	`protein`	`g` (4, 1)	`0x0` - `0x1869e` `0.0` - `9999.9`

Status	Type	Source(s)	Payload	Generic?	Notes
✅	`SET_UNIT`	`COMMAND`	`unit`	`uint8Parselizer`
✅	`SET_TARE`	`COMMAND`	`shouldReset`	`booleanParselizer`
✅	`SET_AUTO_OFF`	`COMMAND`	`timeout`	`uint8Parselizer`
✅	`MEASUREMENT`	`NOTIFY`	`sign`, `value`, `unit`	`uint8Parselizer`
✅	`TARE_STATE`	`NOTIFY`	`isOn`	`booleanParselizer` (inverted)
✅	`AUTO_OFF_STATE`	`NOTIFY`	`timeout`	`uint16Parselizer`	the value is the same as for command with the exception of extra 0 byte
✅	`ERROR_STATE`	`NOTIFY`	`isOn`	`booleanParselizer` (inverted)
✅	`ITEM_STATE`	`NOTIFY`	`isOn`	`booleanParselizer` (inverted)
✅	`UNIT_STATE`	`NOTIFY`	`unit`	`uint8Parselizer`
⌛	`SET_NUTRITION`	`COMMAND`	`12` x `3` byte `integer`		the value is displayed by simple `n/10` division with single fractional point. [more info](# ETEKCITY ESN00 Packets

Parses & serializes packets to and from the format that ESN00 sends and understands.

SET_UNIT (0xc0) - c5736b4, - #2
SET_TARE (0xc1) - #2
SET_NUTRITION (0xc2) - pending
SET_AUTO_OFF (0xc4) - 805a076, #2
MEASUREMENT (0xd0) - bfcf5df
UNIT_STATE (0xd1) - #5
TARE_STATE (0xd3) - bfcf5df, #3
AUTO_OFF_STATE (0xd5) - #2
ERROR_STATE (0xe0) - bfcf5df, #3
ITEM_STATE (0xe4) - bfcf5df, #3

?PING (0xc3)
??? (0xd2)
?PONG (0xd4)
??? (0xe1)
??? (0xe2)
??? (0xe3)