E90-DTU(900SL22) Ebyte free sample tcxo 868MHz 915MHz 22dBm RS232 RS485 auto relay RSSI SX1262 LoRa Modem

[Introduction]：E90-DTU (900SL22) is a data transceiver with military-grade LoRa modulation technology. With multiple transmission modes, it works in the (850.125~930.125MHz) frequency band (Default 868.125MHz). The transceiver provides transparent RS232/RS485 interface and supports 8~. 28V voltage input.