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TTGO T-Call ESP32 with SIM800L GPRS Module-Presolder Header

TTGO T-Call ESP32 with SIM800L GPRS Module-Presolder Header

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USB C to Type A Cable (1 Meter)

USB C to Type A Cable (1 Meter)

  • 10 or more RM7.36
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  • Total accessories: RM0.0
  • Grand total: 99.9

  • Product Code: TTGO-ESP32-800L
  • Warranty Period: 12 months
  • Shipping:

Note: From 20th Dec 2019 onwards, this product is shipped with Pre-Solder Header Pins to further simplify your digital making :)

Note: However, we notice the distance between left and right header pins are not breadboard friendly, so it cannot stack onto breadboard :( Yet, you can still use jumper wires to interface. Check out this tutorial video that uses this board to send and receive SMS, further control relay.


T-CALL is an ESP32 board integrated with GPRS module SIM800L that enables your project to have many wireless technologies, WiFi, Bluetooth and also Cellular. It also comes with USB Type-C for power input and also data for downloading firmware and serial debug. It can also be a standalone board with a built-in battery charging that supports up to 500mA. Best of all it supports Arduino IDE :)

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


  • 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


  • 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.


  • 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

T-Call V1.3 Pin Diagram:

Note: You will need a USB Type-C cable for downloading the program.

Note: Soldering might be necessary if the GPIO is needed.

Packing List:

  • 1 x TTGO T-Call V1.3 board
  • 1 x Battery Cable
  • 2 x 21-way Pin Header
  • 1 x Gprs Antenna (9 cm)




Does it work in singapore? ( Wilson, 11/09/2020 )
Hi, yes it works in Singapore. Thanks :)
Hopefully can share tutorial to connect Blynk app using GSM.Thank in advance ( MOHD RAFIQ FITRI BIN ABDUL RADZI , 18/06/2020 )
Hi, you may drop an email to support@cytron.io for assistance. Our team will reply to you as soon as possible. Thanks :)

May i know when will it restock?

Thank you.

( MountainsBook, 20/02/2020 )
Hi, it is estimated to be restocked in 1-2 weeks. However, you may click on the 'Notify Me' button to keep you updated when the product is back available. Thanks :)
does this makes phone calls too?? or only sends messages? ( Priyadashini Karunakaran, 24/11/2019 )
Hi, yes it can make calls and send messages. Thanks :)

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  • 4.9 out of 5
Total Reviews (33)
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Tags: GPRS, GSM, ESP32, WiFi, Bluetooth, Arduino Compatible, cellular, quad band GSM