46
17
Data upload
success
One short beep(High
frequency)
Green light flashes once
18
Data upload
failure
Three short beeps(Middle
frequency)
）
Red light flashes
thrice
Battery status
I
nstruction
20
Charging
status
None
Blue light turn on
21
Charging
completed
None
Blue light turn off, green
light on
22
Sleep/power off
One long beep(low frequency)
Light off
23
Low Battery
indication
None
Red light on(Won’t
influence green light)
Quick command Instruction
24
Quick command
One long and two short
beeps(High, middle, low
frequency)
Green light flashes once
Data overflow
25
Data overflow
One long beep(low frequency)
Red light flashes once
Receiver LED light Instruction
Item
System status
Sound warning
Indicator status
2.4G & 433USB portable receiver
1
Power on within 30 seconds
---
Green light flashes slowly
2
After power on 30 seconds
---
Green light Normally on
3
Received SDK
---
Green light flashes once
Appendix
Appendix 1: Character
Control character
Hex
^@
（
NULL
）
00
^A
（
SOH
）
01
^B
（
STX
）
02
^C
（
ETX
）
03
