[Transmission Type] : GPRS
[Power] : 30~33dBm
[Size] : 84*82*25mm
[Interface] : RS485/RS232
[Weight] : 136±5g
[Introduction] : E840-DTU (GPRS-03) is a product developed for serial port devices and network servers to transmit data through each other through the network. This product uses the standard AT command, which enables transparent transmission between devices and servers. The cloud platform built by Ebyte can realize the free networking mode. The E840-DTU (GPRS-03) is an industrial grade quad-band GSM/GPRS digital radio.
| Value | Description |
| Support Band | Quad Band: GSM850, EGSM900, DCS1800, PCS1900 Module automatically searches for frequencies Band selection can be set by AT command Compliant with GSM Phase 2/2+ |
| GPRS connection characteristic | GPRS multi-slot class 12 (default) GPRS multi-slot class 1~12 (configurable) GPRS mobile station class B |
| GPRS data feature | GPRS data downstream transmission: up to 85.6kbps GPRS data upstream transmission: up to 85.6kbps Encoding format: CS-1, CS-2, CS-3 and CS-4 Support for PAP (Password Authentication Protocol) protocols commonly used for PPP connections Support is usually used for CHAP (Interrogation Handshake Authentication Protocol) protocol Embedded protocol: TCP/UDP/FTP/PPP/HTTP/NTP/MMS/SMTP/PING, etc. Support for unstructured supplementary data services (USSD) |
| Value | Description |
| Antenna | SMA |
| Data interface | RS485 / RS232 |
| Baud rate | 1200bps ~115200bps，default：115200bps |
| TX power | Class 4 (2W)： GSM850 and EGSM900 Class 1 (1W)： DCS1800 and PCS1900 |
| AT command format | Ebyte general AT command |
| 3GPP frequency | 1 Timeslot | 2 Timeslot | 4 Timeslot |
| CS-1 | 9.05kbps | 18.1kbps | 36.2kbps |
| CS-2 | 13.4kbps | 26.8kbps | 53.6kbps |
| CS-3 | 15.6kbps | 31.2kbps | 62.4kbps |
| CS-4 | 21.4kbps | 42.8kbps | 85.6kbps |
| Pin No. | Pin Item | Pin Application |
| 1 | RS232 | RS232 interface |
| 2 | 485_A | Side A of eternal interface for other RS485 devices |
| 3 | 485_B | Side B of eternal interface for other RS485 devices |
| 4 | GND | Ground |
| 5 | VCC | Power supply 8V-28V DC |
| 6 | PWR | Power indicator |
| 7 | WORK | UART communication indicator |
| 8 | NEL | Radio network working indicator, no light:Initializing, slow flashing: access to the base station, fast flashing:initialization is not successful, always on: access server |
| 9 | DC8~28V | Power adaptor interface, range: 8~28V |
| 10 | RST | Reset（downward，reset） |
| 11 | Restore | The radio operating DIP switch (downward, factory reset) needs to be operated in 3s-10s. |
| 12 | SIM | For SIM card |
| 13 | ANT | Antenna （SMA-K ，50Ω impedance match） |
| Order online |
| 【eBay】：https://www.ebay.com/usr/cdebyte |
| 【Aliexpress】：https://www.aliexpress.com/store/2798183 |
| 【Alibaba】：https://www.alibaba.com |
| For batch order/customized product |
| 【Sales hotline】：+86-28-61399028 Ext.812 |
| 【E-mail】：service@cdebyte.com |
| Technical support |
| 【Submit online】：http://www.ebyte.com/en/apple-technology.aspx |
| 【E-mail】：support@cdebyte.com |
| Model | Interface | Transmission protocol | AT command | TCP/UDP | Package | Size(mm) | Feature | Manual | Sample | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| E840-DTU(EA01) | RS232 RS485 | NB-IoT | - | - | support | support | screwing/DB9 | 82*84*24 | two-way transparent data transmission | ||
| E840-DTU(4G-02E) | RS232 RS485 | 4G | - | - | Support | Support | DB9 | 84*82*25 | Realize two-way data transparent transmission from serial port to network | ||
| E840-TTL-4G02E | UART | 4G | - | - | Support | Support | Screwing | 42*40*9.7 | Whole network，TCP/UDP | ||
| E840-DTU(NB-03) | RS232 RS485 | NB-IoT | - | - | - | - | Screwing/DB9 | 82*84*25 | Wide coverage,Support multiple network protocols | ||
| E840-TTL-NB03 | UART | NB-IoT | - | - | Support | Support | Screwing | 42*40*9.7 | AT mode,TCP/UDP | ||
| E840-TTL-GPRS03 | UART | GPRS | - | - | Support | Support | Screwing | 42*40*9.7 | Supporting quad-frequency | ||
| E840-DTU(GPRS-03) | RS485/RS232 | GPRS | - | - | Support | Support | Screwing | 84*82*25 | Supporting quad-frequency, AT command set | ||
| E840-DTU(GPRS-01) | RS485/RS232 | GPRS | - | - | Support | Support | Screwing | 84*82*25 | Supporting quad-frequency, AT command set | ||
| E840-DTU(NB-02) | RS232 RS485 | NB-IoT | - | - | - | - | Screwing/DB9 | 82*84*25 | Low power consumption,customization |
