TTGO T-Display 4MB ESP32 WiFi Bluetooth Module 1.14 inch Development Board for Arduino Hardware Specifications 1. Chipset: ESPRESSIF-ESP32 240MHz Xtensa single-dual-core 32-bit LX6 microprocessor 2. FLASH: QSPI flash 4MB 3. SRAM: 520 kB SRAM 4. Button: Reset 5. USB to TTL: CP2104 6. Modular interface: UART, SPI, SDIO, I2C, LED PWM, TV PWM, I2S, IRGPIO, ADC, DACLNA pre-amplifier 7. Display: IPS ST7789V 1.14 Inch 8. Working voltage: 2.7V-4.2V 9. Working current: About 67MA 10. Sleep current: About 350uA 11. Working temperature range: -40 degree C~ +85 degree C 12. Size: 51.52x25.04x8.54mm 13. Weight: 7.81g Power Supply Specifications 1. Power Supply: USB 5V1A 2. Charging current: 500mA 3. Battery: 3.7V lithium battery 4. JST Connector: 2Pin 1.25mm 5. USB: Type-C Wi-Fi 1. Standard: FCCCE-REDICTELECKCCSRRCNCC esp32chip 2. Protocol: 802.11 bgn(802.11n, speed up to150Mbps)A-MPDU and A-MSDU polymerization, support 0.4uS Protection interval 3. Frequency range: 2.4GHz~2.5GHz(2400M~2483.5M) 4. Transmit Power: 22dBm 5. Communication distance: 300m Bluetooth 1. Protocol: Meet bluetooth v4.2BREDR and BLE standard 2. Radio frequency: With -97dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter AFH 3. Audio frequency: CVSD&SBC audio frequency Software specification 1. Wi-Fi Mode: StationSoftAPSoftAP+StationP2P 2. Security mechanism: WPAWPA2WPA2-EnterpriseWPS 3. Encryption Type: AESRSAECCSHA 4. Firmware upgrade: UART downloadOTA (Through networkhost to download and write firmware) 5. Software Development: Support cloud server development SDK for user firmware development 6. Networking protocol: IPv4, IPv6, SSL, TCP, UDP, HTTP, FTP, MQTT 7. User Configuration: AT + Instruction set, cloud server, androidiOSapp 8. OS: FreeRTOS