Axivity WAX3

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The WAX3 is a wireless accelerometer that talks MiWi over 802.15.4. Source code/schematics/etc. are available at Open Movement's Google Code


Start Byte Length (bytes) Description Format
0 1 Report Type Always 0x12 = USER_REPORT_TYPE
1 1 Report ID Always 0x78 (ASCII 'x')
2 2 Device ID
4 1 Device Status Bit 0 = battery warning, bits 1-7 = reserved
5 2 Analog Sample Top 6 bits are measurement info, bottom 10 are measurement
7 1 Accelerometer Info Top two bits is G-range: 00=±16g, 01=±8g, 10=±4g, 11=±2g
next two bits is format: 0=10-bit raw -> 3x10-bit + 2, 2=signed 16-bit
lowest four bits is the rate code: frequency = 3200 / (1 << (15-(n & 0x0f)))
8 2 Sample Sequence Number Resets on sleep
10 1 Number of samples left to transmit after this packet 0xFF = 255 or more
11 1 Number of samples in this packet
12  ??? Sample Data