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E840-TTL(4G02-DNE) Modbus Wireless RF Module Transmitter Receiver Industrial Grade Radio Communication 4G LTE UART for M2M
[Introduction]：E840-TTL(4G02-DNE) is developed for serial port devices and network servers to transmit data to each other through a network.
| Pin No. | Name | Description |
|---|---|---|
| 1 | RST | Reset pin |
| 2 | IO_RT | The low level lasts for 3~10S, the module parameters will be restored to the factory settings, and will be restarted immediately. |
| 3 | LIKA | SocketA link connection status indicator pin, corresponding to the onboard left 1 LED. High: SocketA is successfully connected to the web server; Low: SocketA did not successfully connect to the network server; |
| 4 | LIKB | The SocketB link connection status indicator pin corresponds to the onboard left 2 LED. High: SocketB is successfully connected to the web server; Low: SocketB did not successfully connect to the network server; |
| 5 | DATA | The data TX and RX indication pin, when the network receives the data or the serial port receives the data (50ms high/10ms low), correspondingto the onboard left 3 LED light. |
| 6 | STAT | The device status indication pin corresponds to the onboard left 4 LED. Low: The device is powered on to search for SIM card 1800ms low, 200ms 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 receiving pin, default 3.3V, compatible with 5V communication level. |
| 8 | TXD | Data transmitting pin, default 3.3V, compatible with 5V communication level. |
| 9 | VEF | Drive level power supply pin, if you need to achieve serial communication and LED indication is 5V drive level, you need to input 5V level on this pin. |
| 10、11、14、15、23 | MOD、SLE、PA11、PA10、EN | NC |
| 12 | 4V2 | Lithium battery power supply pin, power supply range:3.8V~4.3V. This pin is prohibited from being reversed and is not allowed to be supplied with VCC. |
| 16 | VCC | DC power supply pin, power supply range: 5V~18V. This pin is prohibited from being reversed and is not allowed to be supplied with VCC. |
| 19 | VD | External SIM card power supply pin, if the onboard SIM card holder is used, the pin remains NC |
| 20 | RS | External SIM card reset pin, if the onboard SIM card holder is used, the pin remains NC |
| 21 | DA | External SIM card data pin, if the onboard SIM card holder is used, the pin remains NC |
| 22 | CL | External SIM card clock pin, if the onboard SIM card holder is used, the pin remains NC |
| 24 | LIKD | SocketD link connection status indicator pin, corresponding to the onboard right 3 LED. High: SocketD is successfully connected to the web server; Low: SocketD did not successfully connect to the network server; |
| 25 | LIKC | SocketC link connection status indicator pin, corresponding to the onboard right 2 LED. High: SocketC is successfully connected to the web server; Low: SocketC did not successfully connect to the network server; |
| 13、17、18 | GND | Ground |