MH-M38 Wireless Bluetooth Audio Module

DESCRIPTION The TTGO T-Call V1.3 is an IoT development board that combines an ESP32 microcontroller with a SIM800L GSM/GPRS module. It enables Wi-Fi, Bluetooth, SMS, voice calls, and cellular data communication on a single compact board, making it suitable for remote monitoring, tracking, smart agriculture, telemetry, and IoT applications. The board includes a Nano SIM slot, onboard battery charging circuit, and USB-C interface for programming and power. FEATURES Integrated ESP32 and SIM800L for Wi-Fi, Bluetooth, GSM, GPRS, SMS, and voice communication. Internet Connectivity via Cellular Network without requiring Wi-Fi coverage. SMS and Call Support for remote alerts and control applications. Dual Connectivity Options through Wi-Fi and GSM/GPRS. Onboard Battery Management for portable and battery-powered projects. Low-Power Modes suitable for remote IoT deployments. USB-C Programming and Power Interface for convenient development. OTA (Over-the-Air) Firmware Updates supported through ESP32 networking features. Rich Peripheral Support including ADC, DAC, PWM, SPI, I²C, and UART interfaces. Ideal for IoT Applications such as GPS trackers, smart agriculture, telemetry, remote monitoring, smart meters, and industrial automation. APPLICATIONS Remote Monitoring Systems – Monitor sensors and equipment in locations without Wi-Fi access. Smart Agriculture – Track soil moisture, temperature, humidity, and irrigation systems remotely. Asset and Vehicle Tracking – Transmit location and status data when paired with a GPS module. Home Automation – Control and monitor appliances through SMS, calls, or internet connectivity. Industrial Automation – Collect machine data and send alerts for maintenance or fault conditions. Smart Energy Management – Monitor power consumption and transmit energy usage data to cloud platforms. Environmental Monitoring – Measure and report weather, air quality, water quality, or environmental conditions. Security and Alarm Systems – Send SMS notifications or make calls when intrusion, fire, or other alarms are triggered. IoT Data Logging – Store and transmit sensor data to remote servers for analysis and reporting. Telemetry Systems – Enable remote acquisition and transmission of data from distributed devices.