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Chengdu Ebyte Electronic Technology Co.,Ltd.

E28-2G4T27SX User Manual

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

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5.2. Broadcast

5.3. Broadcast Address

i.e.: set the address of module A as 0xFFFF or 0x0000 and channel as 0x04.

When set A as transmitter (same mode, transparent transmission on), all modules with channel 0x04 will receive broadcast
data.

5.4. Monitor Address

i.,e.: set the address of module A as 0xFFFF or 0x0000 and channel as 0x04.

When set A as receiver, it will receive the data transmitted by modules with channel 0x04.

5.5. Module Reset

When the module is powered on, the AUX output will go to a low level immediately, the module conducts hardware
self-check and sets the operating mode on the basis of the user parameters (M0 M1). During the process, the AUX level
remains low. After the process completed, the AUX outputs high a level and starts to work as per the operating mode
indicated by the combined state of M1 and M0. The user needs to wait until the AUX rising edge is high, indicating the
module is ready for normal work.

5.6. AUX Description

AUX Pin can be used as indication for wireless send & receive buffer and self-check. It can indicate whether there is data
that is yet to send via wireless or whether all wireless data has been sent through UART, or whether the module is still in the
process of self-check initialization.

5.6.1 Indication of serial output

Used to wake up the external MCU (note: AUX indicates no delay under continuous mode)

Summary of Contents for E28-2G4T27SX

Page 1: ...E28 2G4T27SX SX1280 2 4GHz LoRa Module...

Page 2: ...ion of serial output 8 5 6 2 Indication of wireless transmission 9 5 6 3 Module in configuration process 9 6 Operation Modes 9 6 1 Mode Switch 9 6 2 Transmission Mode Mode 0 10 6 3 RSSI Mode Mode 1 10...

Page 3: ...Chengdu Ebyte Electronic Technology Co Ltd E28 2G4T27SX User Manual Copyright 2012 2020 Chengdu Ebyte Electronic Technology Co Ltd 2 About us 19...

Page 4: ...amp hole which is convenient for user s secondary development and integration 1 2 Features Support various modulation such as GFSK Mode FLRC Mode LoRa Mode Supporting high speed continuous transmissio...

Page 5: ...ication level V 3 3 For 5V TTL it may be at risk of burning down Operating temperature 40 85 Frequency MHz 2400 2500 ISM band Power consumption Transmitting current mA 500 Instant power consumption Re...

Page 6: ...ctronic Technology Co Ltd E28 2G4T27SX User Manual Copyright 2012 2020 Chengdu Ebyte Electronic Technology Co Ltd 5 Size 40 5 25mm Antenna IPEX Sample hole 50 Impedance 3 Mechanical Characteristics 3...

Page 7: ...he module operation status when user wakes up the external MCU it outputs low level during initialization after power on and self check can be configured as open drain output or push pull output pleas...

Page 8: ...7 4 Recommended Connection Diagram 5 Functional Description 5 1 Fixed Transmission No Brief description for module MCU connection STM8L MCU as example 1 The wireless UART module adopts TTL level pleas...

Page 9: ...iately the module conducts hardware self check and sets the operating mode on the basis of the user parameters M0 M1 During the process the AUX level remains low After the process completed the AUX ou...

Page 10: ...ermined accordingly by pins M0 M1 Please refer to below instructions 6 1 Mode Switch User could determine the module operation mode through the combination of high low level of M2 M1 and M0 Mode switc...

Page 11: ...CU working time and lower energy consumption Similarly this feature can be utilized for any mode switch the module will enter new mode automatically within 1ms when current even is processed completel...

Page 12: ...three E2 in HEX format the module will enter a 10s parameter configuration window period user could configure the module parameters in the 10s with C0 command 10s later the module will work with the...

Page 13: ...le the default 00H 00H FFH 3 SPED 7 6 UART parity bit The serial modes can be different on two sides 0 0 8N1 default 0 1 8O1 1 0 8E1 1 1 8N1 equal to 00 5 4 3 TTL UART baud rate bps Under normal mode...

Page 14: ...original setting after complete the process It is transparent transmission under continuous mode 0 Transparent transmission mode 1 Fixed transmission mode 6 Reserved 5 Reserved 4 Measuring mode device...

Page 15: ...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 wh...

Page 16: ...ower supply low voltage under room temperature is lower than 2 5V the lower the voltage the lower the transmitting power Due to antenna quality or poor matching between antenna and module 9 2 Module i...

Page 17: ...n Tsmin Min preheating temp 100 150 Preheat temperature max Tsmax Max preheating temp 150 200 Preheat Time Tsmin to Tsmax ts Preheating time 60 120 sec 60 120 sec Average ramp up rate Tsmax to Tp Aver...

Page 18: ...ectronic Technology Co Ltd 17 11 Related products Type IC Frequency Power Distance Size Package Interface Hz dBm km mm E28 2G4T27SX SX1280 2 4G 12 5 3 17 5 28 7 SMD TTL E28 2G4M27S SX1280 2 4G 27 8 15...

Page 19: ...ellent performance and reasonable price Model Type Frequency Gain Size Feeder Interface Feature Hz dBi mm cm TX2400 NP 5010 FPC 2 4G 2 0 10x50 IPEX FPC antenna TX2400 JZ 3 Rubber 2 4G 2 0 30 SMA J Str...

Page 20: ...on Date Description Operator 1 0 2020 8 19 Initial Version Li About us Technical support support cdebyte com Documents and RF Setting download link www ebyte com Thank you for using Ebyte products Ple...

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