UTC903 Wireless GPRS DTU Data Transmission Module with Loaded Antenna(STM8+ A7102C)

Features:
- configure our standard 8.5cm rod antenna from the ground 2 meters high, the air rate 1kbps, power +18 dbm conditions measured distances up to about 1500 m
- the operating frequency 430-440MHz can be set for multi-node special occasions
-  serial interface, support 1200/2400/4800/9600/19200/38400/57600bps
-  receive current of 15mA, hibernation is only 1.5uA, low power consumption to meet the requirements of the low-power devices
-  transmit power up to +18 dbm, the average emission current of 44mA
-  FSK modulation, the use of efficient error correction coding anti-interference ability
-  data buffer, support, send up to 256 bytes
- standard DIP spacing interfaces for the embedded application 

 

parameter	Value	Unit
Operating voltage	3V - 3.6V, recommended operating voltage of 3.3V	V
Temperature range	-40 to +85	℃
Operating Humidity	10%～90%
Operating frequency	410-450Mhz, 433Mhz near the recommended	MHz
Transmit power	+18dBm	dBm
Air transfer rate	1K,2K,5K,10K,20K,50K	kbps
Emission current	44	mA
Continue to receive current	15	mA
Sleep current	1.5	uA
The highest sensitivity	-122dbm @1kbps	dBm
Serial transmission rate	1200/2400/4800/9600/19200/38400/57600	bps
The maximum data packet length	256	byte
Number of configuration changes	300k	cycles
Size	32 X 21 X 1	mm

  

Working status	Pin Configuration	Description
Operating mode 1	SET_A = 0 SET_B = 0	Monitor serial port and air RF channel. When the serial data received through the air RF channel to send the normal format of data packets. When the air RF channel to receive the correct data, sent through the serial port. The second operating mode
Operating mode 2	SET_A = 0 SET_B = 1	Monitor serial port and air RF channel. When the serial data received through the air RF channel to send a specially formatted data packet. When the air RF channel to receive the correct data, sent through the serial port. The third operating mode
Operating mode 3	SET_A = 1 SET_B = 0	Time to time to sleep and wake up listening air RF channel. When the air RF channel to receive the correct data, sent through the serial port.
Operating mode 4	SET_A = 1 SET_B = 1	RF circuit module MCU main clock and peripherals are off, and consumes only about 1.5uA settings for configuration parameters.

Normal mode communication:
- Communication module in the normal mode of communication, the module can be two-way communication. Module at the same time listening to the serial port and air radio channel, so the module can do sender can also make the receiving end. Sender and receiver, respectively, the following description of the processes:
 
A sender: SET_A pin is set low, SET_B pin is set low.
- When listening to the serial data input, set low AUX and switching to the state of the wireless transmitter, the serial data received interleaving error correction coding, and then sent through the air RF channel, send the end of the rear AUX pin and re-transferred support the listening state.
 
Receiving end: SET_A pin is set low, SET_B pin is set to low.
- When the received data from the air, radio frequency channel after interleaving error correction decoding and error checking to confirm the data received is correct, the set low AUX and immediately after the end of the serial output decoded data, the output is set high AUX pin and re-turn into holding a listening state.

Low-power mode of communication:
- Communication module in a low-power receive mode, the receiver module through regular sleep and monitor air RF channel to achieve the purpose of the low-power transmitter module RF data by sending special packets to the receiver to communicate. The following describes the process flow:
 
A sender: SET_A pin is set low, SET_B pin is set high.
- When listening to the serial data input, set low AUX and switching to the state of the wireless transmitter, the serial data received interleaving error correction coding, and build the preamble length of a wake-up cycle special data packet, and then through the air RF channel sent out, after sending home AUX pin and transferred to holding the listening state.
 
Receiving end: SET_A pin is set to high, SET_B pin set low.
- Module to initialize the RF section, the RF part into hibernation. A wake-up cycle (one second), the RF part of the receiving state, the search for air radio frequency channel preamble, such as search, you immediately enter the sleep state to wait for a wake-up cycle again. Such as the search to continue to receive the packet to the remaining part of the receiver down, and then after interleaving error correction decoding error detection to confirm the data is correct, the set low AUX and immediately from the end of the serial output decoded data, the output high AUX pin. Such as work status has not changed again to enter a dormant state waiting for a wake-up cycle.
If the receiving end need to return the data to the sender, by changing the state of the receiving end is about SET_A pin is set low and SET_B pin is set low. The way of normal communication mode to communicate.

Application areas:
-  Vehicle monitoring, remote control, telemetry, small wireless network, wireless meter reading, access control systems, residential paging, industrial data acquisition systems, wireless tags, identification, non-contact RF smart cards, small wireless data terminals, security, fire systems, wireless remote control system, bio-signal acquisition, hydrological and meteorological monitoring, robot control, wireless 232 data communications, wireless 485/422 data communications, digital audio, digital image transmission.