User Manual

Page 8 of 11
User manual – Wireless Gas Leak Detector, avolta
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[CONFIDENTIAL]
9. Downlink commands
Downlink commands can be sent through the LoRaWAN network. Please see
hereafter for their description. Note that the frame counter can be kept to zero.
Read commands
Name
Description
Frame request
Frame answer
Read Gas
thresholds
Get concentration
thresholds (small,
alarming, high) in %LEL
[0]: Frame
counter
[1]: 0x92
[0]: Frame counter
[1]: 0x92
[2]: small gas leak threshold (%LEL)
[3]: medium gas leak threshold (%LEL)
[4]: large gas leak threshold (%LEL)
Read
payload
Get the payload thought
BLE service
[0]: Frame
counter
[1]: 0x95
[0]: Frame counter
[1]: 0x95
[2]: Payload version
[3-6]: running time in hours
[7]: Last gas concentration
[8-9]: Last temperature value
[10]: Humidity
[11]: Battery voltage
Speaker
status during
alarm
Speaker status during an
alarm
[0]: Frame
counter
[1]: 0x96
[0]: Frame counter
[1]: 0x96
[2]: 0 sound alarm is disabled; 1 sound
alarm is enabled during an alarm
Write commands
Name
Description
Frame request
Frame answer
(if frame request
is correct)
Gas
thresholds
Set the values
of the
concentration
alarms (small,
alarming, high)
[0]: Frame counter
[1]: 0x82
[2]: small gas leak threshold (%LEL)
[3]: alarming gas leak threshold (%LEL)
[4]: large gas leak threshold (%LEL)
Check: [2] ≤ [3] ≤ [4]
[0]: Frame
counter
[1]: 0x82
Request
LoRa
payload
Send a LoRa
payload, if not
join, will
generate a join
[0]: Frame counter
[1]: 0x84
[0]: Frame
counter
[1]: 0x84
Speaker
status during
alarm
Enable/Disable
the speaker
during an
alarm
(enabled by
default)
[0]: Frame counter
[1]: 0x86
[2]: 0 disables the speaker during alarm, 1 enables
the speaker during alarm
[0]: Frame
counter
[1]: 0x86
Errors
Name
Description
Frame
request
Frame answer
Error
return
[0]: Frame counter
[1]: 0x32 command unknown (SDCS_V2_FAIL_INVALID_CMD)
0x33 missing arguments (SDCS_V2_FAIL_INVALID_DATASIZE)
0x34 incorrect parameters (SDCS_V2_FAIL_INVALID_VALUE)