AMB8426-M_8626-M_MA_EN_V2_4
Page 14 of 48
Released: Nov.2013
The most significant byte is returned first (MSB first); this byte identifies the product ("product
ID").
7.8 CMD_FWV_REQ
This command serves to requests the firmware version. Herewith the major, minor und patch
–
position of the FW-Version is returned.
Format:
0xFF
0x0C
0x00 0xF3
Return:
0xFF
0x8C
0x03 < 3 Byte FW-Version > <CS>
Example (Version 2.0.6):
0xFF
0x8C
0x03 0x02 0x00 2x06 0x74
7.9 CMD_RSSI_REQ
This command returns the current RX level as determined by the transceiver IC in the form of a
signed two's complement value.
Format:
0xFF
0x0D
0x00 0xF2
Return:
0xFF
0x8D
0x01 < RX level > < CS >
The obtained value (RX level RSSI
dBm
in dBm) is comprised as follows:
1. Conversion of the hexadecimal value to a decimal RSSI
dec
value
2. If RSSI
dec
128: RSSI
dBm
= (RSSI
dec
–256) / 2 - 74
3. Otherwise (RSSI
dec
< 128): RSSI
dBm
= RSSI
dec
/ 2 - 74
The relation between the calculated value and the physical RX level in dBm is not linear across
the entire operating range and is displayed in Figure 10.
