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SX1278 Wireless Module

E32 Series User Manual

5. Operating mode

Contents in below table are the introduction of input status of M1 & M0 and their corresponding mode:

Mode

（

0-3

）

Mode introduction

Remark

Mode 0

Normal

UART and wireless channel are open, transparent

transmission is on

The receiver must work in mode

0 or mode 1

Mode 1

Wake-up

UART and wireless channel are open. The difference

between normal mode and wake-up mode is it will add

transmission so that it can awaken the receiver works in

mode 2

The receiver can work in mode 0,

mode 1 or mode 2

Mode 2

Power-saving

UART is disabled. Wireless module works at WOR mode

(wake on radio). It will open the UART and transmit data

after receiving the wireless data

1, the transmitter must work in

mode 1

2, transmitting is not allowed in

The user can decide the operating mode by the combination of M1 and M0. The two GPIO of MCU can be used to switch mode.

After modifying M1 or M0, it will start to work in new mode 1ms later if the module is free. If there are any serial data that are yet to

finish wireless transmitting, it will start to work in new mode after the UART transmitting finished. After the module receives the

wireless data & transmits the data through serial port, it will start to work in new mode after the transmitting finished. Therefore,

the mode-switch is only valid when AUX outputs 1, otherwise it will delay.



For example, in mode 0 or mode 1, if the user inputs massive data consecutively and switches operating mode at the same time, the

mode-switch operation is invalid. New mode checking can only be started after all the user ’ s data process completed. It is



If the module switches from other modes to stand-by mode, it will work in stand-by mode only after all the remained data process

completed. The feature can be used to save power consumption. For example, when the transmitter works in mode 0, after the

external MCU transmits data “12345”, it can switch to sleep mode immediately without waiting the rising edge of the AUX pin, also

the user’s main MCU will go dormancy immediately. Then the module will transmit all the data through wireless transmission & go

dormancy 1ms later automatically, which reduces MCU working time & save power.



Likewise, this feature can be used in any mode-switch. The module will start to work in new mode within 1ms after completing

present mode task, which enables the user to omit the procedure of AUX inquiry and switch mode swiftly. For example, when

switching from transmitting mode to receiving mode, the user MCU can go dormancy before mode-switch, using external interrupt

function to get AUX change so that the mode-switch can be realized.



This operation is very flexible and efficient. It is totally designed on the basis of the user MCU’s convenience, at the same time the

work load and power consumption of the whole system have been reduced and the efficiency of whole system is largely improved.

Содержание E32 Series

Страница 1: ... modified based on product upgrade please refer to the latest version All rights to interpret and modify this manual belong to Chengdu Ebyte Electronic Technology Co Ltd Version Date Description Issued by 1 00 2017 11 10 Initial version huaa User Manual ...

Страница 2: ...rted RFIC SX1278 from SEMTECH transparent transmission is available TTL level The module has the function of data encryption compression The data of the module transmitted over the air features randomness And with the rigorous encryption decryption data interception becomes pointless The function of data compression can decrease the transmission time probability of being interfered while improving...

Страница 3: ...1 5 E32 433T30S 12 4 Recommended circuit diagram 13 4 1 Reset 13 4 2 AUX description 13 4 2 1 Indication of UART output 13 4 2 2 Indication of wireless transmitting 14 4 2 3 Configuration procedure of module 14 4 2 4 Notes for AUX 14 5 Operating mode 15 5 1 Mode switch 15 5 2 Normal Mode Mode 0 16 5 3 Wake up mode Mode 1 16 5 4 Power saving mode Mode 2 16 5 5 Sleep mode Mode 3 17 5 6 Quick communi...

Страница 4: ...of module B 80 refers to the channel of module B then module B receives AA BB CC only module B Broadcast transmission Set the module address as 0xFFFF then the module can communicate with other modules in same channel FEC Forward Error Correction high coding efficiency good correction performance In the case of sudden interference it can correct the interfered data packets proactively so that the ...

Страница 5: ... module The current at the instant of transmitting may be high but the total energy consumed may be lower due to very short transmitting time When using external antenna the impedance matching degree at different frequency points between antenna and module may affect the transmitting current value at different levels E32 TTL 100S1 100 110 120 mA E32 T100S2 100 110 120 mA E32 TTL 500 390 410 450 mA...

Страница 6: ...unication level is higher than the allowed maximum value the module may be damaged Although the communication level can be switched with various methods the power consumption of the whole module will be affected at great degree Modules are compatible with some of the microcontrollers at 5V communication level They are too many to be listed here Please base on practical test or talk to us for more ...

Страница 7: ...quency Model Min Typ Max Unit Remarks E32 TTL 100 410 433 441 MHz To work within the recommended frequency can assure the modules to meet all the parameters To avoid the crowded integral frequency like 433 0MHz 868 0MHz 915MHz etc is advisable E32 TTL 100S1 410 433 441 MHz E32 T100S2 862 868 893 MHz E32 TTL 500 862 868 893 MHz E32 TTL 1W 900 915 931 MHz E32 433T30S 900 915 931 MHz 2 4 Tested range...

Страница 8: ...XD Input TTL UART inputs connects to external MCU PC TXD output pin Can be configured as open drain or pull up input 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 To wake up the external MCU during the procedure of self check initialization the pin outputs low level Can be...

Страница 9: ...t pin Can be configured as open drain or pull up input 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 To wake up the external MCU during the procedure of self check initialization the pin outputs low level Can be configured as open drain output or push pull output Floating ...

Страница 10: ... pin Can be configured as open drain or pull up input 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 To wake up the external MCU during the procedure of self check initialization the pin outputs low level Can be configured as open drain output or push pull output Floating i...

Страница 11: ...ects to external MCU PC TXD output pin Can be configured as open drain or pull up input 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 To wake up the external MCU during the procedure of self check initialization the pin outputs low level Can be configured as open drain out...

Страница 12: ...f check initialization the pin outputs low level Can be configured as open drain output or push pull output floating is allowed 6 VCC Input Voltage reference of module Power supply 2 6V 5 5V DC 7 GND Input Ground 8 RESET Input Reset pin when program is loading floating users do not need to connect 9 GND Input Ground pin when program is loading floating users do not need to connect 10 SWIM Input SW...

Страница 13: ... the basis of the user parameters During the process the AUX keeps 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 the user needs to wait the AUX rising edge as the starting point of module s normal work 4 2 AUX description AUX Pin can be used as indication for wireless send receive buffer and self check ...

Страница 14: ...data is still in transmission 4 2 3 Configuration procedure of module Only happened when power on resetting or exiting sleep mode 4 2 4 Notes for AUX For function 1 function 2 mentioned above the priority should be given to the one with low level output which means if it meets each of any low level output condition AUX outputs low level if none of the low level condition is met AUX outputs high le...

Страница 15: ...hed Therefore the mode switch is only valid when AUX outputs 1 otherwise it will delay For example in mode 0 or mode 1 if the user inputs massive data consecutively and switches operating mode at the same time the mode switch operation is invalid New mode checking can only be started after all the user s data process completed It is recommended to check AUX pin out status and wait 2ms after AUX ou...

Страница 16: ...s data have been transmitted via serial port the AUX outputs high level 5 3 Wake up mode Mode 1 When M1 0 M0 1 module works in mode 1 Transmitting The condition of data packet transmission AUX function is the same as mode 0 The only difference is that the module will add preamble code before each data packet automatically The preamble code length depends on the wake up time set in the user paramet...

Страница 17: ...s setting for details Notes When the mode changes from stand by mode to others the module will reset its parameters during which the AUX keeps low level and then outputs high level after reset completed It is recommended to check the AUX rising edge for user 5 6 Quick communication test Steps Operation 1 Plug the USB test board E15 USB T2 into computer make sure the driver is installed correctly P...

Страница 18: ... will reset one time and they must be sent in succession 6 1 Default parameter Default parameter values C0 00 00 1A 17 44 Model Frequency Address Channel Air data rate Baud rate Parity Transmitting power E32 TTL 100 433MHz 0x0000 0x17 2 4kbps 9600 8N1 100mW Default parameter values C0 00 00 1A 17 44 Model Frequency Address Channel Air data rate Baud rate Parity Transmitting power E32 TTL 100S1 433...

Страница 19: ...scription C4 C4 C4 In sleep mode M0 1 M1 1 User gives the module instruction HEX format C4 C4 C4 the module resets for one time During the reset process the module will conduct self check AUX outputs low level After reset completing the AUX outputs high level then the module starts to work regularly which the working mode can be switched or be given another instruction 6 5 Parameter setting instru...

Страница 20: ...ormance and longer transmitting time The air data rate must keep the same for both communication parties 4 CHAN 7 6 5 N A 4 0 Communication channel 410M CHAN 1M default 17H 433MHz 0 recommended 00H 1FH correspond to 410 441MHz 5 OPTION 7 Fixed transmission similar to MODBUS 0 Transparent transmission mode 1 Fixed transmission mode 6 IO drive mode the default 1 1 TXD and AUX push pull outputs RXD p...

Страница 21: ...smitter that works in mode 1 can be received The wake up time set by transmitter cannot be less than the monitor interval time of receiver otherwise it may lead to data loss In case of two way communication both parties should keep the wake up time the same The longer the wake up time the lower the average receive current consumption After turn off FEC the actual data transmission rate increases w...

Страница 22: ...ing serial number and press the OpenPort button Please choose other serial numbers until open successfully 5 Interface Press Preset button the interface will be as below If failed please check if the module is in mode 3 or if the driver has been installed 6 Input parameter Please adjust the parameter as your request according to the corresponding setting then click SetParam button write the new pa...

Страница 23: ...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 Average ramp down rate Tp to Tsmax 6 second max 6 second max Time 25 to peak temperature ...

Страница 24: ...tting power Due to antenna quality or poor matching between antenna and module 9 2 Module is easy to damage Please check the power supply source ensure it is 2 0V 3 6V voltage higher than 3 6V will damage the module Please check the stability of power source the voltage cannot fluctuate too much Please make sure anti static measure are taken when installing and using high frequency devices have el...

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