E840-TTL-NB03 Ebyte UART Smart Home System Data Transceiver Module Nb Iot Solutions Wireless Rf NB-IoT Module
[Transmission type]：NB-IoT
[Power]：23dBm
[Size]：42*40*9.7mm
[Interface]：UART
[Weight]：11.7±0.1g
[Introduction]：E840-TTL-NB03 is developed for serial port devices and network servers to transmit data through the network. It supports B8 frequency band. It can be easily set up with simple AT commands. It can be used to realize serial-to-network two-way data transparency transmission.
| Pin No. | Name | Description |
|---|---|---|
| 1 | RST | Reset. |
| 2 | IORT | When in low level for 3~10S, module returns to factory setting and start over immediately. |
| 3 | LINK | The link connection status indication pin corresponds to the onboard left 1 LED.High：successfully connect with network server；Low：fail to connect with network server. |
| 4、24、25 | NC | Suspended, N/A. |
| 5 | DATA | The data transceiver indication pin, when the network receives the data or the serial port receives the data (50ms high/10ms low), corresponding to the onboard left 3LED light. |
| 6 | STAT | The device status indication pin corresponds to the onboard left 2 LED.Low: The device is poweredon to search for SIM card 1800ms for low, 200ms for high:the device checks the correct SIM card and is attaching to the network;High: The device is attached to the network successfully. |
| 7 | RXD | Data RX，default 3.3V，compatible with 5V. |
| 8 | TXD | Data TX，default 3.3V，compatible with 5V. |
| 9 | VEF | Drive level power supply pin, if user need to achieve serial communication and LED indication of 5V drive level, user need to input 5V level on this pin. |
| 10、11、14、15、23 | MOD、SLE、PA0、PA1、EN | Suspended, N/A. |
| 12 | 4V2 | Lithium battery power supply pin，range：2.5V~3.6V. This pin is prohibited from being reversedand is not allowed to be supplied with VCC. |
| 16 | VCC | DC power supply pin，range：5V~18V.This pin is prohibited from being reversed and is not allowed to be supplied with 4V2. |
| 19 | VD | Power pin to connect SIM externally, NC for pcb SIM card holder. |
| 20 | RS | Reset pin to connect SIM externally, NC for pcb SIM card holder. |
| 21 | DA | Data pin to connect SIM externally, NC for pcb SIM card holder. |
| 22 | CL | Clock pin to connect SIM externally, NC for pcb SIM card holder. |
| 13、17、18 | GND | Ground. |