Features: Compared with T7-V1.4, the two pin GPIO16 and GPIO17 that cannot be used for external expansion are replaced with GPIO25 and GPIO27 that can be used to define functions, so that they can be for those expansion board of miniD1, and are not affecte by original GPIO16 and GPIO16. GPIO17 pin impact. Radio frequency: with -97dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter-AFH. Protocol: 802.11 b-g-n(802.11n,speeds up to150Mbps)A-MPDU and A-MSDU polymerization,support 0.4S for Protection interval. Firmware upgraded, UART -download/-OTA(Through-network/host to-download and write firmware). Software development, support cloud-server development /-SDK for user firmware development. Specifications: Type: 4MB, 16MB(optional) Hardware Specifications: Chipset: ESPRESSIF-WROVER-B 240MHz -Xtensa single-/dual-core 32-bit LX6- microprocessor FLASH: QSPI flash 4MB / PSRAM 8MB SRAM-: 520kB-SRAM Button: resets USB to TTL: CH9102F QFN24 Modular-interface: UARTSPISDIO-I2CLED-PWMTV-PWM-I2SIRGPIOcapacitors touch-sensor-ADCDACLNA pre-amplifier On-boards clock: 40MHz crystal oscillator Working voltage: 2.7V-3.6V Working current: about 30mA PowerSupply Specifications: PowerSupply: USB 5V/1A Charging current: 500mA Battery: 3.7V lithium-battery Wi-Fi Description: Standard: -FCC/CE-RED/-IC/-TELEC/-KCC/SRRC/-NCC Frequency range: 2.4GHz~2.5GHz(2400M~2483.5M) Transmit Power: 22dBm Communication distance: 300m Bluetooth-compatible Description: Protocol: meet bluetooth-compatible v4.2BR/-EDR and BLEstandard Audio-frequency: CVSD&-SBC audio-frequency Software Specification Description: Wi-Fi Mode: Station/-SoftAP/-SoftAP+Station/-P2P Security mechanism: WPA-/WPA2/WPA2-Enterprise/-WPS Encryption Type: for AES/-RSA/-ECC/-SHA Networking protocol: IPv4IPv6-SSL-TCP/-UDP/HTTP/-FTP/MQTT User Configuration: AT + Instruction set, cloud-server, -android/iOSapp OS: -FreeRTOS Note: Please allow 0-1cm error due to manual measurement. Package includes: 1x T7 Mini32 v1.5 Expansion Board (4MB/16MB optional) 6x Pin 1x Line