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E78-DTU(900LN22) LoRaWAN RF RS485 module 6601 chip wireless ad hoc network polling Node modem 868MHz915MHzCortexM4
[Introduction]：The E78-DTU (900LN22) is a standard LoraWan node data transceiver designed and produced by Chengdu Ebyte Electronic Technology Co., Ltd.
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| Pin number | Item | Features | Explanation |
| 1 | DB9 female socket | RS232 interface | Standard RS232 interface |
| 2 | 3.81mm Phoenix terminal block | RS485, power interface | Standard RS485 interface and pressure line power interface |
| 3 | PWR-LED | Power Indicator | Red, always on when the power is on |
| 4 | LINK-LED | Status Link Indicator | Yellow, always on when connected to the gateway |
| 5 | DATA-LED | Data sending and receiving indicator | Yellow, flashing when sending and receiving data |
| 6 | DC -IN power interface | Power interface | In-line round hole, outer diameter 5.5mm, inner diameter |
| 7 | DIP switch | DIP switch | Reload (restore factory settings) and RST (reset) DIP |
| 8 | Antenna interface | SMA-K interface | External threaded inner hole, length 10mm, characterisc |