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Chengdu Ebyte Electronic Technology Co., Ltd.

E220-900T30S User Manual

Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.

8

5. Function Description

5.1 Fixed Transmission

No.

Brief description of the connection between the module and the MCU (The picture above takes STM8L MCU

as an example)

1

The wireless serial port module is TTL level, please connect with TTL level MCU.

2

For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.

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Summary of Contents for E220-900T30S

Page 1: ...E220 900T30S User Manual 868 915MHz 30dBm New Generation LoRa Wireless Module ...

Page 2: ... 10 5 6 2 Indication of wireless transmitting 10 5 6 3 Configuration procedure of module 10 5 6 4 Notes for AUX 11 6 Operating Mode 11 6 1 Mode Switching 11 6 2 Normal mode Mode 0 12 6 3 WOR sending mode Mode 1 12 6 4 WOR receiving mode Mode 2 13 6 5 6 5 Deep Sleep Mode Mode 3 13 7 Register Read and Write Control 13 7 1 Command Format 13 7 2 Register Description 14 7 3 Factory Default Parameter 16...

Page 3: ...Chengdu Ebyte Electronic Technology Co Ltd E220 900T30S User Manual Copyright 2012 2020 Chengdu Ebyte Electronic Technology Co Ltd 2 Revision History 22 About us 22 ...

Page 4: ...he test data obtained in this paper are obtained by E Baite laboratory and the actual results may be slightly different It is hereby declared that all trade names trade marks and registered trade marks mentioned herein are the property of their respective owners The right of final interpretation belongs to Chengdu Yibaite Electronic Technology Co LTD The attention The contents of this manual may c...

Page 5: ...the communication distance can reach 10km The maximum transmit power is 30dBm and the software is multi level adjustable Support users to set the communication key by themselves and it cannot be read which greatly improves the confidentiality of user data Support RSSI signal strength indicator function for evaluating signal quality improving communication network and ranging Support air wakeup tha...

Page 6: ...z 850 125 930 125 Support ISM band Power consum ption TX current mA 610 Instant power consumption 30dBm RX current mA 17 Sleep current μA 3 Software is shut down Max Tx power dBm 29 5 30 0 30 5 Receiving sensitivity dBm 129 124dbm BW_L 125kHz SF 7 LORATM 129dbm BW_L 125kHz SF 9 LORATM 121dbm BW_L 250kHz SF 7 LORATM 129dbm BW_L 250kHz SF 10 LORATM 117dbm BW_L 500kHz SF 7 LORATM 127dbm BW_L 500kHz S...

Page 7: ...M0 to decide 4 working modes of module not suspended if not used could be grounded 3 RXD Input TTL UART inputs connects to external MCU PC TXD output pin Can be configured as open drain or pull up input Ground 4 TXD Output TTL UART outputs connects to external RXD MCU PC input pin Can be configured as open drain or push pull output 5 AUX Output To indicate module s working status wakes up the exte...

Page 8: ...DC 7 GND Input Ground 8 NC Input can be suspended 9 GND Input Ground 10 NC Input can be suspended 11 NC Input can be suspended 12 NC Input output can be suspended 13 NC Input output can be suspended 14 NC Input output can be suspended 15 GND Ground 16 GND Ground 17 GND Ground 18 ANT output High frequency signal output 50 ohm characteristic impedance 4 Connect to MCU ...

Page 9: ...5 Function Description 5 1 Fixed Transmission No Brief description of the connection between the module and the MCU The picture above takes STM8L MCU as an example 1 The wireless serial port module is TTL level please connect with TTL level MCU 2 For some MCU works at 5VDC it may need to add 4 10K pull up resistor for the TXD AUX pin ...

Page 10: ...m all modules under channel 0x04 the purpose of monitor is realized 5 5 Reset When the module is powered AUX outputs low level immediately conducts hardware self check and sets the operating mode based on user s parameters During the process the AUX remains low level After the process completed the AUX outputs high level and starts to work as per the operating mode combined by M1 and M0 Therefore ...

Page 11: ...es data less than 400 bytes without overflow When AUX 0 the buffer is not empty the data in the internal 400 byte buffer has not been written to the wireless chip and the transmission is started At this time the module may be waiting for the end of the user data to time out or the wireless sub packet transmission is in progress Note When AUX 1 it does not mean that all serial port data of the modu...

Page 12: ...ser switches to other operating modes from mode 3 sleep mode or it s still in reset process the module will reset user parameters during which AUX outputs low level 5 Due to the characteristics of the LoRa modulation method the information transmission delay is much longer than that of FSK For example at 2 4kbps airspeed the 100 byte transmission delay is about 1 5 seconds It is recommended that c...

Page 13: ...e the transmitter module works in mode 0 the user transmits the serial port data 12345 and then does not have to wait for the AUX pin to be idle high level and can directly switch to sleep mode And the user s main MCU immediately sleeps the module will automatically transmit the user data through the wireless and automatically enters sleep within 1ms This saves MCU s working time and reduces power...

Page 14: ...rom the sleep mode to other modes the module will reconfigure the parameters During the configuration process AUX will remain low After configuration it outputs high level we suggest that user test rising edge T_BUSY 7 Register Read and Write Control 7 1 Command Format In configuration mode mode 3 M1 1 M0 1 the supported command list is as follows when setting only 9600 8N1 format is supported No ...

Page 15: ...ress Read or Write Name Description Remark 00H Read Write ADDH ADDH default 0 High byte and low byte of module address Note When the module address is equal to FFFF it can be used as the broadcast and monitor address that is the module will not perform address filtering at this time 01H Read Write ADDL ADDL default 0 02H Read Write REG0 7 6 5 UART Serial Port Rate bps For the two modules that comm...

Page 16: ...t time The current channel noise is dBm 256 RSSI Instruction format C0 C1 C2 C3 start address read length Return C1 address read length read valid value for example send C0 C1 C2 C3 00 01 Return C1 00 01 RSSI address can only start from 00 0 Disable Default 1 Enable 4 3 2 Reserve 1 0 Transmitting Power The relationship between power and current is non linear and the power supply has the highest ef...

Page 17: ...ender and receiver must agree very important 0 0 0 500ms 0 0 1 1000ms 0 1 0 1500ms 0 1 1 2000ms 1 0 0 2500ms 1 0 1 3000ms 1 1 0 3500ms 1 1 1 4000ms 06H Write CRYPT _H Key high byte default 0 Write only read returns 0 Used for encryption to avoid interception of wireless data in the air by similar modules The module will use these two bytes as a calculation factor to transform and encrypt the air w...

Page 18: ...face of the E220 900T22S configuration host computer The user can switch to the command mode through M0 and M1 and quickly configure and read the parameters on the host computer In the configuration of the host computer the module address frequency channel network ID and key are all displayed in decimal mode the value range of each parameter Network address 0 65535 Frequency channel 0 83 Internet ...

Page 19: ...dule and routed on the bottom layer Assuming that the module is soldered or placed on the top layer it is also wrong to randomly route the wires on the bottom layer or other layers which will affect the stray and receiving sensitivity of the module to varying degrees Assuming that there are devices that interfere with electromagnetic interference around the module it will also greatly affect the p...

Page 20: ...utput The matching degree of the antenna and the module is poor or the quality of the antenna itself is problematic 10 2 Module is easy to damage Please check the power supply to ensure that it is within the recommended power supply voltage If it exceeds the maximum value the module will be permanently damaged Please check the stability of the power supply and the voltage should not fluctuate grea...

Page 21: ...b37 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 pea...

Page 22: ... excellent performance and reasonable prices Model No Type Frequency Hz Interface Gain dBi Height mm Feeder cm Features TX868 JZ 5 Rubber Antenna 868M SMA J 2 0 52 Ultra short straight omnidirectional antenna TX868 JK 20 Rubber Antenna 868M SMA J 3 0 210 Bendable rubber omnidirectional antenna TX868 XPL 100 Suction Antenna 868M SMA J 3 5 290 100 Small suction antenna cost effective TX915 JZ 5 Rubb...

Page 23: ...ion Issued by 1 0 2020 07 08 Original Version ken 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 Official hotline 028 61399028 Web www ebyte com Address Building B5 Mould Industrial Park 199 Xiqu Ave High tech Zone Chengdu 611731 Sichuan China...

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