... , and 1 stop bit,none checkout.3) Data transmitting velocity is optional,that are 1200b/s, 2400b/s, 4800b/s, 9600b/s ... , 19200b/s,default data is 9600b/s.4) Comply with the protocol standard of MODBUS ... the information header and sending code data.This communication mode is also compatible with RTU communication agreement. Digital Temperature and Humidity ...