Features: 1. The microprocessor consists of a 32-bit dual-core MCU, a ULP core and an internal 4MB flash memory to provide stable performance. 2. Micro USB interface has complete safety circuit such as voltage regulator circuit, ESD protection and short circuit protection. 3. Reserved SH1.25-2 battery interface, integrated lithium battery management system, with charge and discharge management, overcharge protection, battery power detection, USB/battery power automatic switching function 4. Provide serial port function through CP2102 USB-UART chip, which is convenient for program downloading and debugging information printing. 5. With good impedance matching, RF circuit design and low power design (sleep current≤30ua), it can be easily deployed in IOT applications. Specification: Condition: 100% Brand new MCU: ESP32 (240MHz Tensilica LX6 dual core + 1ULP core, 600DMIPS, 520KB Static Random Access Memory, W-F1, dual Mode Compatible with Bluetooth) Chip: SX1276 Frequency: EU_433, CN470_510, EU_863_870, US_902_928 four frequency optional Signal Maximum Output Power: 18±dB Hardware Resources: UARTx3; SPIx2: 12Cx2; 12Sx1 12-bits ADC, 8-bits DAC 29 general purpose GPIO Display: 0.96 inch 128*64 O-LED display FLASH: 4MB (32M-bits) SPI FLASH Interface: Micro USBx1; antenna interface (IPEX)x1 Size: Approx. 50.2 x 25.5 x 9.74mm / 2 x 1 x 0.4in USB to UART chip: CP2102 Type of battery: 3.7V lithium battery (SH1.25x2 interface) Battery detection circuit: Yes Controllable external device power output (Vext): Yes Low power design: Deep sleep 30uA Electrical characteristics condition Minimum value Typical value Maximum value power supply USB powered(≥500mA) 4.7V 5V 6V Lithium powered (≥250mA) 3.3V 3.7V 4.2V 3.3V pin header power supply (≥150mA) 2.7V 3.3V 3.5V 5V pin header power supply (≥500mA) 4.7V 5V 6V Power consumption (mA) Wireless scanning 115mA WIFI Access Point 135mA 10dB signal output 50mA 12dB signal output 60mA 15dB signal output 110mA 20dB signal output 130mA Output 3.3V pin output 500mA 5V pin output (USB only) Equal to input current Controllable external device power output (Vext 3.3V) 350mA Optional Style: 433MHZ Frequency Band, 470MHZ Frequency Band, 868MHZ Frequency Band, 915MHZ Frequency Band Package List: 1 x Module 1 x Pin Sticker 2 x 20Pin Row Pin 1、The microprocessor consists of a 32-bit dual-core MCU, a ULP core and an internal 4MB flash memory to provide stable performance. 2、Micro USB interface has complete safety circuit such as voltage regulator circuit, ESD protection and short circuit protection. 3、Reserved SH1.25-2 battery interface, integrated lithium battery management system, with charge and discharge management, overcharge protection, battery power detection, USB/battery power automatic switching function 4、Provide serial port function through CP2102 USB-UART chip, which is convenient for program downloading and debugging information printing. 5、With good impedance matching, RF circuit design and low power design (sleep current≤30ua), it can be easily deployed in IOT applications.