Tranducer_CO2 测试

在Tranducer_SHT基础上增加如下寄存器
25	MODBUS_IS_CO2	写1
74	MODBUS_CO2	for co2, co2 value（新增）
98 	写0
99	写0

REG100-REG108温度 的电压电流的scale设置
REG110-REG118湿度 的电压电流的scale设置
REG120-REG128CO2 的电压电流的scale设置 （新增）

120	MODBUS_DEF_CUSTOMER_CO2	for co2,default scale or customized, 0: default , 1: customized 
121	MODBUS_CURRENT_MIN_CO2	for co2,the minimum currnet of customiezed scale
122	MODBUS_CURRENT_MAX_CO2	for co2,the maximum currnet of customiezed scale
123	MODBUS_VOLTAGE_MIN_CO2	for co2,the minimum voltage of customiezed scale
124	MODBUS_VOLTAGE_MAX_CO2	for co2,the maximum voltage of customiezed scale
125	MODBUS_CO2_MIN		the minimum co2 of customiezed scale
126	MODBUS_CO2_MAX		the maximum co2 of customiezed scale
127	MODBUS_OUTPUT_CUR_CO2	 	for co2,vale of output current , You need to divide by 10. For example, 123 means 12.3 ma
128	MODBUS_OUTPUT_VOL_CO2		for co2,value of output voltage , You need to divide by 10. For example, 123 means 12.3 V

REG130 	设置第一路输出显示的内容 		0 = 温度	1 = 湿度 ,2 = co2
REG131	设置第二路输出显示的内容 		0 = 温度	1 = 湿度 ,2 = co2

130	MODBUS_OUT1_SOURCE		the source of 1st output, 0 = temp, 1 = hum,2 = co2
131	MODBUS_OUT2_SOURCE		the source of 2nd output, 0 = temp, 1 = hum,2 = co2