变风量空调系统多参数测量方法pdf,变风量空调系统多参数测量方法15mAT89C52
TTL
PC
RS232
SHT1I
MAX232E
SHTII
TTL
RS232
SHTIl
SHT11 SCK
vO
DATA
VO
Cl+
ⅤCC
GND
V+ MAX232
RS 232C
TIout
n十
O
n
Rlin
RXD
TXD
IO
RXD
Tlin
SHTII
1n
Rout
GND
GND
图3PC与单片机的硬件连接电路图
2 3 SHT11 SCK
P1.0,
DATA
P1.1.