Ebyte 4440-GPRS User Manual page 28

Wireless Data Transceiver
01
Receiv
Device ModBus
e
address
Modbus TCP protocol write heartbeat packet time register：
00 01
Transmi
Protocol
Send
ssion
identifier
identifier
00 01
Transmis
Protocol
Receive
sion
identifier
identifier
4.4.5 Ebyte cloud transparent transmission
The Ebyte cloud transparent transmission function can be turned on or off. The register
corresponding to this function is 40170 (0x00A9), which supports 0x03, 0x06, 0x10 function codes：
When the value of this register is 0x0000, the cloud transparent transmission function is turned
off;
When the value of this register is 0x0001, the cloud transparent transmission function is turned
on;
Default turn off.
4.4.6 Read IMEI
The IMEI register read start address is 40171 (0x00AA), and the total length of the register is 11.
The first register is the IMEI length, and the second register to the eleventh register stores the IMEI
value. For example, IMEI:867732035802677, the corresponding register values are as follows. In the
registers, the IMEI value is a hexadecimal ASCII value.
40171（0x00AA)
IMEI length
00 0F
4.4.7 Read SN
The SN register read start address is 40182 (0x00B5), and the total length of the register is 11.
The first register is the SN length, and the second register to the eleventh register stores the SN value.
For example, SN: 18101194228B027, the corresponding register value is as follows. In the register,
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06 00 A8
Function
Address
code
00 00 00 06 01
Unit
Length identifie
r
00 00 00 06 01
Unit
Length identifie
r
38 36 37 37 33 32 30 33 35 38 30 32 36 37 37 00 00 00 00 00
00 05
Write value
06 00 A8
Functi
on Address
code
06 00 A8
Functi
on Address
code
40172（0x00AB) --40181(0x00B4)
IMEI value
E850-DTU(4440-GPRS) datasheet
C8 29
CRC code
00 05
Register length
00 05
Register
length
28