Welcome to place large order! l Introduce RF-TTL-SMA is our latest 100mW wireless transmission module. It working in 425-450.5MHz band and using serial port to send or receive data. Its advantage is that centralized power density, transmission distance(Its transmission distances can reach 2000 meters.) and strong anti-jamming capability. Especially the ability to penetrate diffraction, it is more strong than other band. RF-TTL-SMA having the FEC forward error correction algorithm, the coding efficiency is higher and the error correction capability is strong. When in the case of burst interference, it can take the initiative to correct the interference packets , that greatly improving the reliability and transmission distance. The module also having data encryption and compression function. When transmission data in the air, it is random and unsafe. But after the module rigorous encryption and decryption algorithm, the data interception becomes meaningless and improves transport security. The module has four operating modes , and can freely switch at runtime , in the power saving mode , current consumption is only ten of uA, it is very suitable for ultra-low- power applications. 1. Power Requirements The supply voltage of RF-TTL-SMA is 1.9V-3.6V DC, and the current supply capability of the power supply is not less than 200MA. When the module transmitting data, due to the current mutation lead to a greater supply ripple. So users must have an external circuit ripple rejection. You must pay more attention on using low quiescent current and low dropout LDO, because common LDO ripple rejection is poor. When you use the ordinary linear regulator, or a larger quiescent current regulator, or DCDC DC converter , the situation will be much more optimistic . The power supply is a prerequisite for good quality wireless module stability and effectively enhance the transmission distance, receiver sensitivity , and life. 2. Module Reset After the module is powered, AUX will immediately output low, begin the hardware self-test and work in accordance with the user parameter settings. In this process, the AUX keep low. After, AUX out high and work in accordance with predetermined operating mode. So users need to wait AUX rising edge, working as a starting point of the module. 3. AUX Detail introduction AUX is used for wireless transmission indication and output indicator. It indicates whether the data has not been emitted by wireless from the module, or the wireless data has been received. In the following case, if they meet any one condition, the AUX will output low: 1. User via a serial port to send data to the module , and it has not completely written to the wireless chip. 2. Wireless module received data, and it has not completely send to user. 3. In the process of resetting the module has not yet completed the self-test , or has not been initialized. When the following conditions are met, the AUX output low: All user data have been written to the wireless chip and have started launching. At the same time, the module dose not receive wireless data, and need not output serial data to the user l Parametric Description Num Parametric Name Detailed Description 1 Main chip SI4463-B1B 2 Module size 20* 36mm 3 Interface 1*7*2.54mm, you can use the universal plate and DuPont line 4 Supply voltage 1.9-3.6V DC 5 Communication voltage 0.7VDD-5.2VDC, VDD is the supply voltage of module 6 Measured distance 2000m@1K 7 Maximum power 20dbm 8 Air Rate 8 adjustable rating 9 Dormancy Current About 1.7uA(M1 =1, M0 = 1) 10 Power Level 8 adjustable rating 11 Transmitting current 89mA@100mW output 12 Receiving current 14.5mA@Mode 0 and 1. The lowest is about 20uA@Mode 2 + 2s wake up 13 Antenna SMA external antenna 14 Communication Interface UART serial port, 8N1/8E1/8O1, from 1200 to 115200 a total of 8 kinds baud rate 15 Transmitting length Figure 1 Single data packet is 256 bytes 16 Receiving length Single data packet is 256 bytes 17 RSSI Support Built-in intelligent processing 18 Reception sensitivity -119dbm@1Kbps 19 Work temperature -30 - +85°C 20 Work humidity Relative humidity :10% - 90% 21 Storage temperature -40 - +125°C 22 Working frequency 425MHz – 450.5MHZ, 100KHz stepper 2. Module Features l Transmission distance of 2000 meters l Multiple baud l -119dBm Receiver sensitivity l Ultra-low -power receive l Four operation modes l Sleep current is only 1.7uA l Air wake-up function l Double ring buffer 256Bytes l Built-in watchdog , never crash l Software FEC correction , data compression l Support voltage reading function l Frequency 425 - 450.5M, 256 channels l Efficient encryption algorithms , error correction function 3. Application l Wireless meter reading l Wireless Sensor l Smart Home l Intelligent Robot l Consumer Electronics l Street lighting control l High-voltage monitoring l Environmental Engineering l Automated data collection l Remote control and monitoring l Other wireless transmission applications 1. Module pins and dimensions Pin Num Pin Name Pin Direction Application 1 M0 Input( Very weak pullup) Match with M1, select 4 operating modes of the module. Do not leave 2 M1 Input( Very weak pullup) Match with M0, select 4 operating modes of the module. Do not leave 3 RXD Input TTL serial input and it connected to an external TXD out pin 4 TXD Output TTL serial output and it connected to an external RXD out pin 5 AUX Output Used to indicate the status of the module 6 VDD Power provide, must be between 2.0 to 3.6 DC(Unit: V) 7 GND Ground Attention: 1. 1 and 2 above functions, output low priority , it is namely : to meet any one of the output low condition , AUX outputs low. When all the low-level conditions are not satisfied , AUX output high. 2. When the AUX output low , indicating that the module is busy at this time does not work mode detection . 3. When the user to switch to a new operation mode, at least 2ms after the rising edge of the AUX, the module will truly enter this mode. 4. Users enter from SLEEP mode to the normal operating mode , or in the reset process , the module will re-set user parameters. And in the configuration process , the AUX will output low. 1. Working Mode Working mode M1 M0 Introduction Remark 0 General mode 0 0 Serial open and wireless open , transparent transmission The receiver must be modes 0,1 1 Weak-up mode 0 1 Serial open and wireless open The receiver can be mode 0,1,2 2 Power-saving mode 1 0 Serial reception closed , wireless wake-up mode Transmitter must be mode 1 3 Sleep mode 1 1 Module into hibernation , and it can receive parameter setting command For more details.just contact us... Package: 2PCS RF module Payment Police We can only accept Paypal by now and thanks for your understanding We apologize that we cannot accept other payment methods, such as cheque or postal orders Shipping & Handling We Ship to Worldwide, but some countries will take long delivery time. Before buying, Please make sure your address is correct. Or not, please correct it before payment Ship to worldwide by china air post service or Singapore post air mail within 12-24 hours after payment completed received, Pls.contact me for the the tracking number if you need it. We advise shipping by DHL or EMS, and we have given a discount for you, you can receive it in 7-15 business days. It takes about 15-45days usually if shipping by Singapore post air mail. Note: Because the adjustment of ebay policy, please make sure your ebay address and your paypal address consistent before you buy, thank you for your helping and understanding. Return & Refund Policy We absolutely stand behind our products. We also offer a 14 day money back guarantee should you be unhappy for any reason whatsoever. We will refund the entire cost of the item upon receipt of the returned item, not including the shipping and insurance charges. Our aim is 100% customer satisfaction! 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