Winsen ZE07-CO, User Manual, Page: 4 / 6

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Pin Description
PIN15 Vin
（
Voltage input 5V-12V
）
PIN5
、
PIN14 GND
PIN1 VOUT(Voltage output 3.0V)
PIN3 Reserved
PIN4 Reserved
PIN7 UART (RXD) 0~3.0V Data input
PIN8 UART(TXD) 0~3.0V Data output
PIN9 Sensor analog signal
PIN10 DAC 0.4V-2V (0 - full range)
PIN2/ PIN6/ PIN11/
PIN12/ PIN13
NC
Fig 2 Pins Diagram
Communication Protocol
1. General Settings
Table 3
Baud Rate 9600
Data Bits 8
Stop Bits 1
Check Bits Null
2. Communication Commands
There are two kinds of communication, initiative upload mode and question & answer mode. We
take initiative upload mode as the default settings. The module upload a gas concentration value
every 1S, and the command line format is as follows: Table 4
Gas concentration value = (Byte4*256+Byte6) x 0.1
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte6 Byte 7 Byte 8
Start Byte Gas Type Unit
No. of
decimal
Concentration
(High Byte)
Concentration
(Low Byte)
Full Range
(High Byte)
Full Range
(Low Byte)
Check sum
0xFF CO=0x04 ppm=0x03 1= 0x01 0x00 0x25 0x13 0x88 0x25