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Ebyte E49-900T20S, User Manual

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Ebyte E49-900T20S User Manual Download Page 15

Chengdu Ebyte Electronic Technology Co., Ltd

E49-900T20S User Manual

Copyright ©2012–2021

，

Chengdu Ebyte Electronic Technology Co.,Ltd.

14

2

Select 5V (the module supports 2.6 ~ 5.5V).

3

Run the "Serial Debug Assistant" software and select the correct serial port number and observe the sending
window and the corresponding receiving window.

7. Command format

Command mode (Mode 2: M0 = 0, M 1 = 1), the list of supported commands is as follows (when set, only 9600, 8N1
format is supported):

No.

Instruction format

Detailed description

1

C0+operating
parameter

Send C0 + 5 byte working parameters in hexadecimal format, a total of 6 bytes and
must be sent continuously (save when power off)

2

C1+C1+C1

Send three C1s in hexadecimal format. The module returns the saved parameters and
must be sent continuously.

Summary of Contents for E49-900T20S

Page 1: ...E49 900T20S User Manuel 868MHz 915MHz SMD Wireless Module ...

Page 2: ... AUX DETAILED EXPLANATION 8 5 2 1 Wireless receiving indication 8 5 2 2 Wireless transmission indication 8 5 2 3 Reset and exit sleep mode 9 5 2 4 AUX Precautions 9 5 2 5 Detailed explanation of fixed point mode 9 5 2 6 Broadcast transmission 10 5 2 7 Broadcast address 10 5 2 8 Monitor Address 11 6 OPERATING MODE 11 6 1 MODE SWITCHING 11 6 2 TRANSMISSION MODE MODE0 12 6 3 RSSI MODE MODE1 12 6 4 SE...

Page 3: ...ER 15 7 3 READING VERSION NUMBER READING 15 7 4 PARAMETER SETTING INSTRUCTION 15 8 HARDWARE DESIGN 18 9 1 COMMUNICATION RANGE IS TOO SHORT 19 9 2 MODULE IS EASY TO DAMAGE 19 9 3 BER BIT ERROR RATE IS HIGH 19 10 WELDING OPERATION GUIDANCE 20 10 1 REFLOW SOLDERING TEMPERATURE 20 10 2 REFLOW SOLDERING CURVE 20 13 BATCH PACKAGING 21 REVISION HISTORY 21 ABOUT US 21 ...

Page 4: ...duction use modification or disclosure to third parties of this document or any part thereof without the express permission of EBYTE is strictly prohibited The information contained herein is provided as is and EBYTE assumes no liability for the use of the information No warranty either express or implied is given including but not limited with respect to the accuracy correctness reliability and f...

Page 5: ...ansmitted by the module in the air is random Through strict encryption and decryption algorithms the data interception is meaningless the probability of interference is reduced and the reliability and transmission efficiency are improved Besides it is a low cost wireless serial transceiver module 1 2 Features The measured communication distance can reach 2 5km Maximum transmit power is 100mW softw...

Page 6: ...t risk of burning down Operating temperature 40 80 Industrial design Operating frequency MHz 850 868 930 Support ISM band Power consumption TX current mA 97 9 Instant power consumption RX current mA 12 04 Sleep current μA 1 3 Software is shut down Max Tx power dBm 20 0 Receiving sensitivity dBm 114 115 116 Air data rate is1 2kbps Air data rate bps 1 2k 2 4k 200k Controlled via user s programming M...

Page 7: ...ntains pull up resistor 6 M1 Input pull up when it s weak Cooperate with M0 to determine 4 operating modes of the module can be lifted floating the module contains pull up resistor 7 RXD Input TTL serial input connect to external TXD output pin 8 TXD Output TTL serial input connect to external RXD output pin 9 AUX Output Used to indicate the working status of the module the user wakes up the exter...

Page 8: ...T antenna 22 GND Module ground wire 4 Recommended wiring diagram No Brief introduction of connection between the module and the single chip microcomputer the above picture uses STM8L single chip microcomputer as an example 1 The wireless serial port module is TTL level please connect with MCU with TTL level 2 Some 5V microcontrollers may require 4 10K pull up resistors on the TXD and AUX pins of t...

Page 9: ...ion of the module 5 2 AUX detailed explanation AUX is used for wireless sending and receiving buffer indication and self inspection indication It indicates whether the data of the module that has not been transmitted through the wireless or whether it has received wireless data that has not been transmitted through the serial port or the module is in the process of initial self test 5 2 1 Wireless...

Page 10: ...ny output low condition is met AUX outputs a low level when all low level conditions are not met AUX outputs a high level When the AUX output is low it indicates that the module is busy and the operating mode detection will not be performed when the AUX output is high the mode switching will be completed When the user enters other modes from mode 3 sleep mode or during the reset process the module...

Page 11: ...nology Co Ltd 10 5 2 6 Broadcast transmission 5 2 7 Broadcast address Example Set the address of module A to 0xFFFF and the channel to 0x04 When module A is used for transmission same mode transparent transmission mode all receiving module under the 0x04 channel can receive data to achieve the purpose of broadcasting ...

Page 12: ...an use the MCU s 2 GPIOs to control the node switching after changing M0 M1 the module is idle and after 1ms it can start working according to the new operating mode if the module has not transmitted serial port data via wireless then entering the new operating mode after the transmission completed if the module receives the wireless data and sends out the data through the serial port it needs to ...

Page 13: ...ngth of the wireless data packet transmitted by the module is 54 bytes when the amount of user input data reaches 54 bytes the module will start wireless transmission At this time the user can continue to enter the data that needs to be transmitted When the user needs to transmit less than 54 bytes the module waits for about 20ms If there is no user data to continue to input the data is considered...

Page 14: ...se serial port 9600 8N1 set module working parameters according to specific instruction format When entering from the setting mode to other modes the module will reconfigure the parameters During the configuration AUX remains low level It outputs a high level after finished so it is recommended that the user detect the rising edge of AUX 6 5 Sleep Mode Mode3 Type When M0 1 M1 1 module working in m...

Page 15: ...ow and the corresponding receiving window 7 Command format Command mode Mode 2 M0 0 M 1 1 the list of supported commands is as follows when set only 9600 8N1 format is supported No Instruction format Detailed description 1 C0 operating parameter Send C0 5 byte working parameters in hexadecimal format a total of 6 bytes and must be sent continuously save when power off 2 C1 C1 C1 Send three C1s in ...

Page 16: ...er E49 900T20S 868MHz 0x0000 0x2E 2 4kbps 9600 20 7 2 Reading operating parameter Instruction format Detailed description C1 C1 C1 In the setting mode M0 0 M1 1 issue a command to the module serial port HEX format C1 C1 C1 The module will return the current configuration parameters such as C0 00 00 18 20 00 7 3 Reading version number reading Instruction format Detailed description C3 C3 C3 In the ...

Page 17: ... baud rate is 4800 011 Serial baud rate is 9600 default 100 The serial port baud rate is 19200 101 Serial baud rate is 38400 110 Serial baud rate is 57600 111 Serial baud rate is 115200 2 1 0 Wireless air rate bps 000 The air rate is 1 2k 001 The air speed is 2 4k default 010 The air speed is 4 8k 011 The air speed is 9 6k 100 The air speed is 19 2k 101 The air speed is 50k 110 The air speed is 10...

Page 18: ...ed transmission mode the first three bytes of each user s data frame can be used as high low address and channel The module changes its address and channel when transmit And it will revert to original setting after complete the process The external power must make sure the ability of current output more than 100mA and ensure the power supply ripple within 100mV Low power transmission is not recomm...

Page 19: ...ose to the digital part of the module and routed in the Bottom Layer Assuming the module is soldered or placed over the Top Layer it is wrong to randomly route over the Bottom Layer or other layers which will affect the module s spurs and receiving sensitivity to varying degrees It is assumed that there are devices with large electromagnetic interference around the module that will greatly affect ...

Page 20: ...ded value the lower the voltage the lower the transmitting power Due to antenna quality or poor matching between antenna and module 9 2 Module is easy to damage Please check the power supply to ensure that it is between the recommended power supply voltage If the maximum value is exceeded the module will be permanently damaged Please check the stability of power source the voltage cannot fluctuate...

Page 21: ...7 Sn96 5 Ag3 Cu0 5 Preheat Temperature min Tsmin 100 150 Preheat temperature max Tsmax 150 200 Preheat Time Tsmin to Tsmax ts 60 120 sec 60 120 sec Average ramp up rate Tsmax to Tp 3 second max 3 second max Liquidous Temperature TL 183 217 Time tL Maintained Above TL 60 90 sec 30 90 sec Peak temperature Tp 220 235 230 250 Aveage ramp down rate Tp to Tsmax 6 second max 6 second max Time 25 to peak ...

Page 22: ...Version Date Description Issued by V1 0 2021 6 10 Format adjustment Linson About us Technical support support cdebyte com Documents and RF Setting download link www ebyte com Thank you for using Ebyte products Please contact us with any questions or suggestions info cdebyte com Fax 028 64146160 Web www ebyte com Address B5 Mould Park 199 Xiqu Ave Chengdu Sichuan China ...

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