[Working voltage]：DC 4.5~18V
[Data interface]：TTL level
[Product size]：25*25mm
[Product weight]：4.3±0.2g
[Introduction]：E840-TTL (EC05-DNE) is a small-sized 4G TTL pin module developed by Ebyte using 4G CAT1 technology for use in the Asia-Pacific region, Australia, New Zealand and other regions. It has the characteristics of small size, high speed, low delay and convenient use. Simple features, simple configuration can realize serial device networking function (two-way transparent transmission between serial device and network server). The 4G pin module adopts 2.0mm pin header, which is easy to debug. Simple configuration can realize the serial port networking process, which is very convenient to integrate into the Internet of Things project. The 4G module supports two links, supports the MQTT protocol, and supports access to the Alibaba Cloud Platform, OneNet Platform, Baidu Cloud Platform, and Huawei Cloud Platform, making it easy to implement IoT applications.
| No. | Name | Function | Description |
| 1 | GND | Ground pin | Can be used as power supply |
| 2 | VCC1 | 4.5~18V input | If the voltage is 4.5V or above (note the module operating voltage range), the VCC1 pin must be used, and the VCC1 power supply load capacity is recommended to be above 2A@5V. Do not power it at the same time as VCC2! ! ! |
| 3 | NC | No pin | Used as ordinary IO when customized, and left floating when not in use |
| 4 | GND | Ground pin | Can be used as power ground |
| 5 | SIM_VDD | External SIM card pin | External SIM card VDD, used to connect external card |
| 6 | SIM_CLK | External SIM card pin | External SIM card CLK, used to connect external card |
| 7 | SIM_RST | External SIM card pin | External SIM card RST, used to connect external card |
| 8 | SIM_DATA | External SIM card pin | External SIM card DATA, used to connect external card |
| 9 | GND | Ground pin | Can be used as power ground |
| 10 | RESET | Restart pin | Pull low to restart the module, external pull-up is recommended when not in use |
| 11 | RXD | Serial port receiving pin | Connected to MCU or TTL debugger TXD |
| 12 | TXD | Serial port sending pin | Connected to MCU or TTL debugger RXD |
| 13 | RS485_EN | RS485 chip enable pin | RS485 enable control pin, set high when serial port sends data, low normally; |
| 14 | RELOAD | Factory reset pin | Press for 3-5 seconds to restore factory settings, all indicator lights light up to indicate success Press and hold the button to power on and enter upgrade mode, all indicator lights flash |
| 15 | STATE STATE | Indicator light external pin | External LED use, common cathode connection |
| 16 | LINK LINK | Indicator light external pin | External LED use, common cathode connection |
| 17 | DATA DATA | Indicator light external pin | External LED use, common cathode connection |
| 18 | VCC | 2 3.3~4.3V input | 4.2V battery system power supply (pay attention to the module operating voltage range), VCC2 power supply load capacity recommended 2.5A@4V or above. It is forbidden to supply power at the same time as VCC1, and reverse connection is forbidden! ! ! |
| 19 | GND | Ground pin | Can be used as power ground |
| 20 | ANT-GNSS | Antenna interface | 1st generation IPEX socket, active antenna (only E840-TTL (EC05-DGC) supports, other models have empty pads) |
| 21 | DATA | Data indicator light | Off: serial port has no data transmission or reception Flashing: serial port sends/receives data |
| 22 | LINK | Link indicator light | Always on: any link is successfully connected to the server; Off: the module is not successfully connected to the server; |
| 23 | STATE | Network status indicator light | Off: the module is powered on and searching for the SIM card; Flashing: the module has detected the correct SIM card and is attaching to the network; Always on: the module is successfully attached to the network; |
| 24 | POWER | Power indicator light | Lights up when the power is on |
| 25 | SIM SIM | Card holder | NaNo SIM card holder, the chip is facing up and the notch is facing inward when the card is inserted |