LILYGO® TTGO T-Call&PMU ESP32 Wireless Module SIM Antenna SIM Card SIM800L Module wtih Mic & Speaker

More Information https github com Xinyuan LilyGO LilyGo T Call SIM800 Feature Hardware SpecificationsChipsetESPRESSIF ESP32 240MHz Xtensa® single dual core 32 bit LX6 microprocessorFLASHQSPI flash 4MB SRAM 520 kB SRAM PSRAM8MBButtonResetUSB to TTLCP2104Modular interfaceUART SPI SDIO I2C PWM I2S ADCOn board clock40MHz crystal oscillator Working voltage2 7V 3 6VSIM cardOnly supports Nano SIM cardWorking temperature range 40℃ 85℃SizeWeight75 15 30 64 10 70mm 14 5g Power Supply SpecificationsPower SupplyUSB 5VCharging currentThe charging current is programmable and self adjustable default 500mA Battery3 7V lithium batteryJST Connector2Pin 2 0mmUSBType CWi FiDescriptionStandardFCC CE RED IC TELEC KCC SRRC NCCProtocol802 11 b g n 802 11n speed up to150Mbps A MPDU and A MSDU polymerization support 0 4μS Protection intervalFrequency range2 4GHz 2 5GHz 2400M 2483 5M Transmit Power22dBmCommunication distance 300mBluetoothProtocolmeet bluetooth v4 2BR EDR and BLE standardRadio frequencywith 97dBm sensitivity NZIF receiver Class 1 Class 2Class 3 emitter AFHAudio frequencyCVSDSBC audio frequencySoftware specificationWi Fi ModeStation SoftAP SoftAP Station P2PSecurity mechanismWPA WPA2 WPA2 Enterprise WPSEncryption Type AES RSA ECC SHAFirmware upgradeUART download OTA Through network host to download and write firmware Software DevelopmentSupport cloud server development SDK for user firmware developmentNetworking protocolIPv4 IPv6 SSL TCP UDP HTTP FTP MQTTUser Configuration