Heltec IOT Lora Wireless Stick Upgrade esp32 loraWiFi lora Development Board with 049inch OLED Display 868MHZ915MHZ

Source Parameter MCUE:SP32( 240MHz Tensilica LX6 dual-core + 1 ULP, 600 DMIPS, 520KB SRAM, Wi-Fi, dual mode Bluetooth) LoRa chip:SX1276 LoRa bands:EU_433, CN_470_510, EU_863_870, US_902_928 four bands optional LoRa maximum output power:18dB ± 2dB  Hardware resources: UART x 3; SPI x 2; I2C x 2; I2S x 1                                      12 – bits ADC; 8 – bits DAC                                      29 general GPIO Display:0.49 inch OLED  FLASH:4MB(32M-bits) SPI FLASH interface:Micro USB x 1; LoRa antenna interface(IPEX) x 1 Size:50.2 x 25.5 x 9.74 mm USB to UART :BridgeCP2102 Battery Type:3.7V Lithium(SH1.25 x 2)  Battery detection circuit: Yes External device power control(Vext) :yes  Low power: design Deep Sleep 40uA