TTGO T-Call ESP32 with SIM800L GPRS Module
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The TTGO T-Call is a new ESP32 development board that combines a SIM800L GSM/GPRS module. The new board combines ESP32 WiFi & Bluetooth WiSoC with SIMCom SIM800L GPRS module, and also happens to rely on a USB-C port for power and programming instead of the more common micro USB port on this type of hardware. It can also be a standalone board with a built-in battery charging that supports up to 500mA.
Besides Wi-Fi and Bluetooth, you can communicate with this ESP32 board using SMS or phone calls and you can connect it to the internet using your SIM card data plan. This is great for IoT projects that don’t have access to a nearby router.
- ESP32 chip (WROVER module) (240Mhz dual core processor)
- Built-in Wi-Fi
- Built-in Bluetooth
- Built-in SIM800L GSM GPRS module
- Built-in power management chip (IP5306) with Li-ion/Li-Po battery charging circuit (charge up to ~2A)
- Built-in micro Nano Sim card connection
- Battery connector: 2p Molex Picoblade
SPECIFICATIONS
- Hardware Specifications:
- Chipset: ESPRESSIF-ESP32 240MHz Xtensa® single-/dual-core 32-bit LX6 microprocessor
- FLASH Memory: QSPI flash 4MB / PSRAM 8MB
- SRAM: 520 KB SRAM
- Button: Reset
- USB to TTL IC: CP2104
- Modular interface: UAR, SPI, SDIO, I2C, LED PWM, TV PWM, I2S, IRGPIO, capacitor touch sensor, ADC, DACLNA pre-amplifier
- On-board clock: 40MHz crystal oscillator
- Working voltage: 2.7V-3.6V
- Working current: About 70mA
- Sleep current: About 300uA
- SIM card: Only supports Nano SIM card
- Working temperature range: -40℃ ~ +85℃
- Size&Weight: 78.83mm*28.92mm*8.06mm(11.77g)
- Power Supply Specifications:
- Power Supply: USB 5V/1A
- Charging current: 500mA
- Battery: 3.7V lithium battery (Not included)
- JST Connector: 2Pin 1.25mm
- USB: Type-C
- Wi-Fi:
- Standard: FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC
- Protocol: 802.11 b/g/n(802.11n, speed up to150Mbps)A-MPDU and A-MSDU polymerization, support 0.4μS Protection interval
- Frequency range: 2.4GHz~2.5GHz(2400M~2483.5M)
- Transmit Power: 22dBm
- Communication distance: 300m
- GSM/GPRS SIM800L:
- Quad-band 850/900/1800/1900MHz
- Connect onto any global GSM network with any 2G SIM
- Send and receive SMS messages.
- Send and receive GPRS data (TCP/IP, HTTP, etc.)
- AT command interface with "auto baud" detection.
- Bluetooth:
- Protocol: Bluetooth v4.2BR/EDR and BLE standard
- Radio frequency: -97dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter AFH
- Audio frequency: CVSD&SBC audio frequency
- Software Specification:
- Wi-Fi Mode: Station/SoftAP/SoftAP+Station/P2P
- Security mechanism: WPA/WPA2/WPA2-Enterprise/WPS
- Encryption Type: AES/RSA/ECC/SHA
- Firmware upgrade: UART download/OTA (Through network/host to download and write firmware）
- Software Development: Support cloud server development /SDK for user firmware development
- Networking protocol: IPv4, IPv6, SSL, TCP/UDP/HTTP/FTP/MQTT
- User Configuration: AT + Instruction set, cloud server, android/iOSapp
- OS: FreeRTOS
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