MTX-405-433DR-B【PDF 5/11 页】MODULE TRANSMITTER 433MHZ 24DIP

MXR-405 Communication

Communication with the MTX-405 is accomplished through a universal asynchronous receive/

transmit (UART) peripheral interface. The UART uses 8-bit, non-parity, LSB, 1200bps baud

format. The maximum number of data bytes that can be transmitted in one packet is 50. The user

will transmit data through the UART on the MTX-405 via pin 24, URXD. The MTX-405 will

packetize and wirelessly transmit the data. The data being sent through the UART should follow a

specific protocol.

The communication protocol is outlined below:

Byte #1

Number of Bytes The number of bytes is one byte containing the total number of

data bytes. This byte should not be included in the number of bytes. Therefore, the

number of bytes should be one less than the total number of bytes being sent. The

maximum number of data bytes that can be transmitted is 50; therefore, the number

of bytes should not exceed 50.

Bytes #2-51 Data Bytes The data bytes are the actual data byte values being transmitted by

the MTX-405. The MTX-405 can send a maximum of 50 data bytes per packet.

The first two bytes are used as preamble bytes by Radios, Inc. to differentiate the

detection of data from noise. They can be set to any value, but to work with the

HHDS-ML they must be set to 0xFF and 0x00, respectively.

When the first byte is received through the UART on the MTX-405, the user will have one second

to send the remaining data bytes to the MTX-405. If the MTX-405 does not receive all of the data

bytes within that second, the data the MTX-405 did receive will be dumped. For example, if the

user sends a 10 for the number of bytes and then only sends five more bytes within one second, the

MTX-405 assumes this is corrupted data and does not transmit the packet. The five bytes the

MTX-405 did receive will be discarded and the MTX-405 will wait for a new packet of data to be

received.

MTX-405

ASK/FSK TRANSMITTER MODULE

-Page 5-

发布紧急采购，3分钟左右您将得到回复。

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购