TTGO T-CALL V1.3 ESP32 with SIM800L

Description

Compact board based on the ESP32 Wi-Fi module and the SIM800L GSM GPRS module. It features 4 MB flash memory, 8 MB PSRAM, Wi-Fi, Bluetooth, 18 GPIOs, power management chip (IP5306) with charging circuit for Li-ion / Li-Po batteries, Nano SIM slot (SIM not included), CP2104 USB-to-serial converter, 2-pin Molex Picoblade connector for connecting a Li-ion / Li-Po battery (not included), USB Type-C connector for programming and/or powering (USB Type-C cable not included), status LED, reset button.

The package includes: the board, adhesive GSM antenna, mini stub GSM antenna, cable with battery connector, two 21-pin male-male strips.

Click on the image to enlarge

Technical specifications

• ESP32:
  – GPIO types: Digital IO (18), 12-bit ADC (16 channels), 8-bit DAC (2 channels), capacitive sensor (10 channels)
• WiFi:
  – 802.11 b / g / n: 2.4 to 2.5 GHz
  – Data rate: 150 Mbps @ 11n HT40, 72 Mbps @ 11n HT20, 54 Mbps @ 11g, 11 Mbps @ 11b
• Bluetooth:
  – 4.2 BR / EDR and BLE (Bluetooth Low Energy)
  – Wi-Fi encryption: AES / RSA / ECC / SHA
• SIM800L module:
  – Consumption:
  sleep mode < 2 mA / idle mode < 7 mA
• SIM card slot: supports only Nano SIM
• Supported frequencies: Quad Band (850 / 950 / 1800 / 1900 MHz)
• Antenna connector: IPX
• Status indication: LED
• Dimensions (mm): 25 x 23 mm
• Operating temperature: -40°C to +85°C
• Reset button: Yes
• USB-TTL converter: CP2104
• Power supply: 5 V 1 A (via USB Type-C connector)
• Usable battery: 3.7 V Li-ion / Li-Po (not included) / charging current: 500 mA
• Operating temperature: -40℃ to +85℃
• Dimensions (mm): 75x29x11
• Weight: 16 grams

Documentation and useful links

• Datasheet, examples, etc.
• Datasheet (ESP32)
• ESP32.com
• Espressif ESP32 Resource Page