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ATIM_ACW-MR4_UG_EN_V1.5
The
type of alert
field is used to identify whether it is a breach of the high threshold, the low threshold, or a return
between the thresholds.
These values are defined as follows:
The
measurement type field
is here identical to that of the measurement frame (ie 0x04 in hexadecimal for the ACW-
MR4).
The sample that caused the alert is then inserted afterwards (with
Big Endian
encoding - MSB first).
Keep alive frame
The life frame is sent at regular intervals according to the configuration applied (by default 4 days) and contains the
battery levels of the product when empty (the product does nothing) and when charging (the product is transmitting
a frame radio)
…
Following this header are 4 bytes, 2 for the empty battery level and 2 for the charging battery level.
The frame is therefore split as follows: 0xAABBBBCCCC
0xAA being the frame header (always equal to 0x81), 0xBBBB the empty battery level (value in millivolts, MSB
coding) and 0xCCCC the charging battery level (value in millivolts, MSB coding)
EXAMPLE
0x81 0d24 0c68
0d24 : empty battery level = 3364 mV therefore 3.364 V
0c68 : battery charging level = 3176 mV therefore 3.176 V
Value
Description
0x00
In between thresholds
0x01
Exceeding the high threshold
0x02
Exceeding the low threshold
0x03
Reserved
Byte 1 - Header
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
New
generation = 1
Timestamp
= 0
Measurem
ent frame
= 0
Reserved =
0
Keep alive frame = 0x01