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sigfox ANALOG - Guide utilisateur / User guide version V2.0.0
4.2.4
Frame for updating the value of specific registers
This frame (0x41) allows to change the value of requested registers.
0
Code
0x41
CONFID1
FR
Description of the frame :
•
Byte 1: CONFID1 (8bits) : indice of the first register to change. The corresponding register is 300 + value of
CONFIDX. For example, if CONFID1 = 20, the product will change the value of register number 320.
•
Byte 2: value to assign to CONFID1 : in this example, its value has a size of 1 byte
•
Byte 3: CONFID2 (8bits) : indice of the second register to change. The corresponding register is 300 + value
of CONFIDX.
EN
•
Bytes 4 and 5: value to assign to CONFID2 : in this example, its value has a size of 2 bytes
•
...
The product does not return any uplink frame following the reception of a downlink frame 0x41. However, the
Config bit of the status byte (see section 4.1.1.2) will be set to 1 in the next scheduled uplink frame (periodic or
alarm or keep alive frame) if all was well done.
IMPORTANT: the value 0xFF for a CONFIDX will stop the reading of the downlink frame. Only the bytes preceding
this value 0xFF will be taken into account. This mechanism can be useful when you need to work in fixed downlink
frame lengths and you do not want to use all available bytes.
1
2
CONFID1
CONFID2
value
3
4
PAYLOAD
CONFID2
CONFID2
value (MSB)
value (LSB)
5
...
CONFID7
...
7
value
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