background image

Chengdu Ebyte Electronic Technology Co., Ltd

E78-400M22S1A User Manual

Copyright ©2012–2019

Chengdu Ebyte Electronic Technology Co.,Ltd.

8

4.2 Reflow soldering curve

5. FAQ

5.1 Communication range is too short

The communication distance will be affected when obstacle exists.

Data lose rate will be affected by temperature, humidity and co-channel interference.

The ground will absorb and reflect wireless radio wave, so the performance will be poor when testing near ground.

Sea water has great ability in absorbing wireless radio wave, so performance will be poor when testing near the sea.

The signal will be affected when the antenna is near metal object or put in a metal case.

Power register was set incorrectly, air data rate is set as too high (the higher the air data rate, the shorter the
distance).

The power 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.

Summary of Contents for E78 Series

Page 1: ...ASR6505 Wireless Module E78 series User Manual...

Page 2: ...METER 2 1 2 PARAMETER DESCRIPTION 3 2 PIN DEFINITION 4 3 E78 400M22S1A PROGRAMMING INTERFACE 6 4 PRODUCTION GUIDANCE 7 4 1 REFLOW SOLDERING TEMPERATURE 7 4 2 REFLOW SOLDERING CURVE 8 5 FAQ 8 5 1 COMMU...

Page 3: ...nsumption for LoRaWAN LinkWAN multiple protocol standards applicable for a variety of IoT application scenarios is currently the best choice for LPWAN applications It is a hardware platform cannot be...

Page 4: ...The current consumed by the RF chip in the pure receiving state is called the receiving current Some RF chips with communication protocols or developers have loaded some self developed protocols on t...

Page 5: ...definition No Name Direction Function 1 GND Ground wire connected to the power reference ground 2 LCD SEG1 0 Input output MCU GPIO 3 LCD SEG1 1 Input output MCU GPIO 4 LCD SEG1 2 Input output MCU GPIO...

Page 6: ...ence ground 23 GND Ground wire connected to the power reference ground 24 SPI NSS Input SPI select pin can select external SPI 25 SPI SCK Input SPI SCK pin can be used as external SPI 26 SPI_MISO outp...

Page 7: ...2 5V 3 7V recommended to add external ceramic filter capacitor 52 GND Ground wire connected to the power reference ground For the pin definition software driver and communication protocol of the modul...

Page 8: ...der Paste Solder paste Sn63 Pb37 Sn96 5 Ag3 Cu0 5 Preheat Temperature min Tsmin Min preheating temp 100 150 Preheat temperature max Tsmax Max preheating temp 150 200 Preheat Time Tsmin to Tsmax ts Pre...

Page 9: ...less radio wave so the performance will be poor when testing near ground Sea water has great ability in absorbing wireless radio wave so performance will be poor when testing near the sea The signal w...

Page 10: ...atement EBYTE reserves the right of final interpretation and modification of all contents in this manual As the hardware and software of the product continue to improve this manual may be subject to c...

Reviews: