ESP32 With Onboard SIM800L !

TTGO T-Call V1.3 ESP32 Wireless Module GPRS Antenna SIM Card SIM800L Module

Are you stuck with your project because of the limited WiFi range of ESP8266 or ESP32 or do want to place your project on a remote location, don’t worry here comes ESP32 With Onboard SIM800L. Now use a sim card with ESP32 for GPRS !!!

Hardware Specifications

ChipsetESPRESSIF-ESP32 240MHz Xtensa® single-/dual-core 32-bit LX6 microprocessor
USB to TTLCP2104
Modular interfaceUART、SPI、SDIO、I2C、LED PWM、TV PWM、I2S、IRGPIO、capacitor touch sensor、ADC、DACLNA  pre-amplifier
On-board clock40MHz crystal oscillator 
Working voltage2.7V-3.6V
Working currentAbout 70mA
Sleep currentAbout 300uA
SIM cardNano SIM card
Working temperature-40℃ ~ +85℃

Power Supply Specifications

Power Supply USB5V/1A
Charging current500mA
Battery3.7V lithium battery
JST Connector2Pin 1.25mm
USB Type-C


Protocol802.11 b/g/n(802.11n,speed up to150Mbps)A-MPDU and A-MSDU polymerization,support 0.4μS Protection interval
Frequency range2.4GHz~2.5GHz(2400M~2483.5M)
Transmit Power22dBm
Communication distance 300m


ProtocolBluetooth v4.2BR/EDR and BLE standard
Radio frequencywith -97dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter AFH
Audio frequencyCVSD&SBC audio frequency

Software specification

Wi-Fi ModeStation/SoftAP/SoftAP+Station/P2P
Security mechanismWPA/WPA2/WPA2-Enterprise/WPS
Firmware upgradeUART download/OTA(Through network/host to download and write firmware)
Software DevelopmentSupport cloud server development /SDK for user firmware development
Networking protocolIPv4、IPv6、SSL、TCP/UDP/HTTP/FTP/MQTT
User ConfigurationAT + Instruction set, cloud server, android/ios app

T-Call V1.3 Pin Diagram

T-Call V1.3 Size Chart

Library for Arduino
Download SIM800L library for Arduino from GitHub 

This Post Has 2 Comments

  1. Rodrigo De Andrade Carreira

    ESP32 with SIM800L + esp32-cam facial recognition + SMS active relay + fingerprint + blynk
    only activate relay when two conditions are accepted (fingerprint + facial recognition)

    some code integrating all ???

    1. Najad

      No, I haven’t done such a thing yet. ill let you know if I find something like that or if I happen to do something like that.

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