Pin Definition; Quick Start; Devices Preparation - Ebyte E840-DTU User Manual

GPRS

1.3 Pin Definition

Pin NO. Name
1 RS232
2 485_A
3 485_B
4 GND
5 VCC
6 PWR
7 WORK
8 NEL
9 DC8~28V
10 RST
11 Restore
12 SIM
13 ANT

2. Quick start

2.1 Devices preparation

Please get UART, SIM card, sucker antenna and etc. ready according to the recommended circuit before test.
One piece of E840-DTU(GPRS-03)
Copyright ©2012–2017, Chengdu Ebyte Electrical Technology Co., Ltd.
5
RS232 interface
Side A of eternal interface for other RS485 devices
Side B of eternal interface for other RS485 devices
Ground
Power supply 8V-28V DC
Power indicator
UART communication indicator
Radio network working indicator, no light: Initializing, slow flashing: access to the base station, fast flashing:
initialization is not successful, always on: access server
Power adaptor interface, range: 8~28V
Reset（downward，reset）
The radio operating DIP switch (downward, factory reset) needs to be operated in 3s-10s.
For SIM card
Antenna （SMA-K ，50Ω impedance match）
E840-DTU（GPRS-03）User Manual
Description
One piece of 12V power adaptor