[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.
| Value | Description |
| Frequency | B8 Module will search frequency automatically |
| NB-IoT connection characteristic | NB data downlink transmission：max 85.6kbps NB data uplink transmission：max 85.6kbps Coding format： CS-1、 CS-2、 CS-3 and CS-4 Support for PAP (PasswordAuthentication Protocol) protocols commonly used for PPP connections Support usually used for CHAP (Interrogation HandshakeAuthentication Protocol) protocol Embedded protocol: TCP/UDP etc Support for unstructured supplementary data services (USSD) |
| Value | Description |
| Antenna | IPEX |
| Data interface | TTL@3.3V compatible with 5V |
| Baud rate | Max of 230400bps, 115200bps as default |
| TX power | 23dBm±2dB |
| Power saving (typical) | In power saving mode, max current consumption：5μA In power saving mode, typical current consumption：3.5μA |
| Working temperature | -30℃- +70℃；extending to -40℃~+85℃ |
| Working voltage | DC：5V~18V；powered by lithium battery：2.5V~3.6V |
| Size | 42×40×9.7 mm |
| SIM card holder | MICRO SIM card holder |
| 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 |