The AM-036 LilyGO TTGO T-Call V1.4 combines an ESP32 microcontroller with a SIM800L cellular module into a single development board. This module allows microcontrollers to communicate over long distances using GSM/GPRS networks alongside short-range Wi-Fi and Bluetooth.

Key Features

• Dual Microcontroller & Cellular Integration: Combines ESP32 processing power (Wi-Fi + Bluetooth 4.2 BLE) with SIM800L GSM/GPRS capabilities.

• USB Type-C Interface: Includes an onboard USB-to-UART bridge (CP2104 / CH9102) for programming and power delivery.

• Cellular Network Support: Enables SMS sending/receiving, voice call functionality, and 2G GPRS data transfer via a Nano-SIM card slot.

• Integrated Battery Management: Includes a 2-pin JST (1.25mm) connector and lithium battery charging IC (TP4056 or similar) to support portable power setups.

• Rich Peripheral I/O: Exposes standard ESP32 GPIOs for UART, SPI, I2C, PWM, ADC, and capacitive touch pins.

Technical Specifications

Typical Applications

• Remote IoT Telemetry: Collecting and pushing sensor data to cloud services in areas without Wi-Fi access.

• SMS Alert Systems: Security, home automation, or fault-detection alerts delivered directly to mobile phones.

• Vehicle & Asset Tracking: GPS/GSM tracking prototypes combined with external GPS sensors.

• Remote Control Switches: Controlling relays and hardware via SMS commands or HTTP/MQTT over GPRS.

Package Includes:

• 1x AM-036 TTGO T-Call V 1.4 ESP32 + SIM800L Module (Faulty)