Description:     The main chip using Lexin ESP32, Tensilica LX6 dual-core processor, clocked at 240MHz, computing power up to 600DMIPS, chip built-in 520 KB SRAM, 802.11 b / g / N HT40 Wi-Fi transceiver, baseband, protocol stack and LWIP, integrated dual-mode Bluetooth (traditional Bluetooth and BLE low power Bluetooth).  This product is based on the WIFI 32 added SX1276 chip, that is, LoRa ™ remote modem, 868MHz frequency, about -148dBm high sensitivity, +20 dBm power output, high reliability.   Onboard 128MByte Flash, Wi-Fi antenna,  lithium battery charging circuit and interface, CH9102X USB to serial chip, the perfect support for development environment, can be very simple and fast for program verification and product development.    Pin diagram:     Operating voltage: 3.3V to 7V.  Operating temperature range: -40 ° C to + 90 ° C.  Supports Sniffer, Station, softAP and Wi-Fi Direct modes.  Data rate: 150 Mbps @ 11n HT40,72 Mbps @ 11n HT20,54 Mbps @ 11g, 11 Mbps @ 11b.  Transmit power: 19.5 dBm @ 11b, 16.5 dBm @ 11g, 15.5 dBm @ 11n.  Receiver sensitivity up to - 98 dBm.  UDP continues to throughput by 135 Mbps.    Package included:     2 x SX1276 LoRa ESP32 868MHz;  2 x Antenna;  2 x Line;  4 x Pin