Product Introduction

Pakistani developers, students, and IoT enthusiasts now have access to a revolutionary communication board that changes how you build connected projects. The Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 combines three powerful wireless technologies into one compact development board. You now get WiFi, Bluetooth, and GSM cellular connectivity on a single platform.

Why limit your IoT projects to WiFi-only coverage when you can connect anywhere? The Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 includes the SIM800L GSM module, enabling your devices to send SMS, make calls, and access the internet through any 2G cellular network . This feature proves invaluable for projects deployed in areas without reliable WiFi coverage.

Students across Pakistani universities choose the Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 for their final year IoT projects. The board's ESP32-WROVER-B chip delivers exceptional processing power with a 240MHz dual-core processor, 4MB flash memory, and 8MB PSRAM . You handle complex applications and real-time data processing without performance bottlenecks.

The upgraded V1.4 version brings significant improvements over V1.3. The Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 includes audio capabilities for speaker and microphone integration, opening new possibilities for voice-based applications . This upgrade makes the board even more versatile for commercial and industrial projects.

Home automation enthusiasts in Pakistan appreciate the board's built-in Li-Po battery charging circuit . The Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 operates independently of wall power, making it ideal for portable and remote installations. You create smart security systems, remote monitoring devices, and emergency alert systems that work anywhere.

Businesses and professionals value the reliability and durability of the Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3. The CP2104 USB-to-TTL chip ensures stable serial communication for programming and debugging . The board operates reliably across temperatures from -40°C to +85°C, handling Pakistan's diverse climate conditions.

The Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 offers exceptional value compared to purchasing separate WiFi, Bluetooth, and GSM modules. You save money while getting better integration and easier development. The USB Type-C port provides modern connectivity and faster data transfers .

Pakistani developers access comprehensive community support and extensive documentation for this board. The Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 works with Arduino IDE and ESP-IDF, making programming accessible to beginners and professionals alike . You find tutorials, sample code, and project ideas from the global ESP32 community.

Investing in this board means investing in your IoT development capabilities. The Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 prepares you for creating commercial-grade products with cellular connectivity. Pakistani innovators are already using this module for smart safety devices and remote monitoring solutions .

2️⃣ Key Features

• Connect anywhere in Pakistan using the onboard SIM800L GSM module for 2G cellular communication

• Develop versatile IoT projects with integrated WiFi, Bluetooth, and GSM on a single board

• Process complex tasks smoothly using the ESP32 dual-core 240MHz Xtensa LX6 microprocessor

• Store more data reliably with 4MB QSPI flash and 8MB PSRAM for demanding applications 

• Power your projects flexibly using USB Type-C or a 3.7V lithium battery via the JST connector

• Charge batteries conveniently with the onboard 500mA charging circuit 

• Send SMS alerts instantly from your IoT devices to any mobile phone

• Make voice calls directly from your projects using the onboard GSM module

• Access the internet anywhere using your SIM card's GPRS data plan 

• Program using familiar tools with Arduino IDE and ESP-IDF support 

• Monitor real-time activity through USB serial debug and AT command interface

• Reset quickly during development using the dedicated reset button

• Use multiple communication protocols including UART, SPI, I2C, and PWM

• Connect external sensors easily through available GPIO pins

• Create portable devices with the board's compact 79mm x 29mm form factor 

• Operate in extreme conditions with -40°C to +85°C temperature range 

• Communicate over long distances with 300m WiFi range and cellular network coverage

• Secure your data transmissions with WPA/WPA2 encryption and AES cryptography 

• Update firmware over-the-air for remote maintenance and feature updates 

• Monitor power consumption with sleep current as low as 300μA for battery projects

3️⃣ Advanced Features

• Develop AI-powered IoT solutions using the ESP32's dual-core processing for edge computing

• Create voice-enabled applications with the microphone and speaker interface pins on V1.4 

• Implement remote diagnostics using the board's OTA (Over-The-Air) firmware update capabilities

• Build cellular IoT gateways that bridge WiFi devices to GSM networks

• Design robust security systems that send alerts via both internet and SMS for redundancy

• Track assets globally by combining GPS modules with GSM connectivity

• Monitor industrial equipment through cellular networks without WiFi infrastructure

• Create emergency response devices that automatically send location via SMS using 2G networks 

• Deploy sensor networks in remote agricultural fields using solar power and GSM connectivity

• Run real-time operating systems with FreeRTOS for multitasking applications 

• Implement MQTT communication over cellular networks for reliable IoT data transfer

• Build fleet management systems with real-time vehicle tracking and communication

• Develop fall detection systems for elderly care that automatically call emergency contacts

• Create smart water meters that send consumption data via SMS to utility providers

• Design remote environmental monitoring for temperature, humidity, and air quality

• Implement two-factor authentication systems using SMS for enhanced security

• Build smart parking solutions that detect occupancy and transmit availability

• Create automated irrigation systems controlled via SMS commands

• Develop smart dispensers for vending machines that report inventory via GPRS

• Design wearable safety devices for women with emergency alert and location sharing 

4️⃣ Frequently Asked Questions

Q1: What is the TTGO T-Call V1.4 ESP32 SIM800L GSM Module?

Answer: This is an ESP32-based development board that combines WiFi, Bluetooth, and GSM/GPRS capabilities in one module. The V1.4 version is the upgraded release of V1.3 .

Q2: What are the main upgrades in V1.4 compared to V1.3?

Answer: The Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 includes microphone and speaker pins for audio applications .

Q3: Which SIM card does this board support?

Answer: The board only supports Nano SIM cards. You need an active 2G SIM card with voice and data services .

Q4: Can I power this board with a battery?

Answer: Yes, the board includes a JST connector for a 3.7V lithium battery and a 500mA charging circuit .

Q5: Does this board work with Arduino IDE?

Answer: Yes, you can program the Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 using Arduino IDE .

Q6: Can I send SMS messages using this module?

Answer: Yes, the SIM800L GSM module enables you to send SMS messages and make voice calls from your projects .

Q7: Does the board connect to the internet without WiFi?

Answer: Yes, you can connect to the internet using your SIM card's GPRS data plan when WiFi is unavailable .

Q8: What is the operating voltage of this board?

Answer: The board accepts 5V via USB Type-C and the ESP32 chip operates at 2.7V-3.6V .

Q9: Where can I find documentation for this board?

Answer: Visit the LilyGO GitHub repository or use the Arduino IDE with the board manager URL for ESP32 .

Q10: Is this board suitable for commercial products?

Answer: Yes, the Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 meets industrial temperature requirements and offers reliable performance .

5️⃣ Where It Can Be Used

1. Women's Safety Devices – Create wearable emergency alert systems that send location via SMS when activated, as demonstrated in Pakistani safety projects 

2. Smart Home Security – Build systems that send SMS alerts during unauthorized access and allow remote control via GSM

3. Agricultural Monitoring – Deploy sensors in remote fields to send crop data via cellular networks without WiFi

4. Industrial IoT – Monitor factory equipment using GSM connectivity in areas without internet infrastructure

5. Fleet Management – Track vehicles and communicate with drivers using the cellular network

6. Remote Weather Stations – Install environmental monitoring devices in off-grid locations with cellular data

7. Healthcare Alerts – Create patient monitoring systems that automatically call caregivers during emergencies

8. Smart Dispensers – Build vending machines that report inventory levels and sales data via GPRS

9. Automated Irrigation – Control agricultural watering systems through SMS commands

10. Educational Projects – Teach Pakistani university students real-world IoT with cellular connectivity 

6️⃣ How to Use

Setting up your Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 starts with installing the necessary drivers and software. The CP2104 USB-to-TTL chip provides reliable serial communication between your computer and the board .

Step 1: Install Drivers – Download the CP2104 driver from the Silicon Labs website. Connect the board via USB Type-C cable and install the driver. Your computer will detect a new COM port, which you use for programming .

Step 2: Set Up Arduino IDE – Install Arduino IDE and add the ESP32 board package. Go to File > Preferences and enter the ESP32 board manager URL: https://dl.espressif.com/dl/package_esp32_index.json. Then navigate to Tools > Board > Boards Manager, search for "ESP32," and install .

Step 3: Select Board and Port – Choose "TTGO T-Call" or "ESP32 Wrover Module" from the board list. Select the correct COM port that appears after connecting your board .

Step 4: Insert SIM Card – Insert a Nano SIM card with an active 2G voice and data plan . Ensure proper orientation and avoid touching the golden contacts.

Step 5: Upload Your Code – Write your program or use example code from the LilyGO GitHub repository. Click Upload and wait for the board to program. The reset button helps enter flashing mode if needed .

Safety Tips – Disconnect the battery when programming via USB. Use a 5V/1A power source for reliable operation . Do not exceed the board's voltage specifications. Keep the board away from moisture and static electricity.

Maintenance Guidance – Store the board in anti-static packaging when not in use. Clean the antenna connector gently to ensure signal strength. Update firmware regularly for security patches. Check battery connections periodically if using lithium batteries.

7️⃣ Advantages

1. Three-in-one connectivity – WiFi, Bluetooth, and GSM in one board saves money and space 

2. Remote operation capability – Projects work anywhere with cellular coverage, not just near WiFi routers

3. Powerful processing – The dual-core ESP32 handles complex applications with 240MHz speed 

4. Battery-ready design – Onboard charging circuit and JST connector enable portable devices 

5. Cost-effective solution – Buying one integrated board costs less than separate modules 

6. Audio expansion – V1.4 adds microphone and speaker pins for voice projects 

7. Large memory capacity – 8MB PSRAM supports data-intensive camera and audio applications 

8. Simple programming – Arduino IDE compatibility makes development accessible for beginners 

9. Secure communication – AES encryption and WPA2 protect your data transmissions 

10. Reliable in harsh conditions – -40°C to +85°C operating range handles extreme environments 

8️⃣ Disadvantages

1. Limited to 2G networks – The SIM800L module only supports 2G cellular, which is being phased out in some regions

2. Nano SIM only – The board only accepts Nano SIM cards, not standard or micro sizes 

3. Not breadboard friendly – The pin spacing prevents stacking directly onto breadboards 

4. Requires driver installation – USB-serial drivers need setup before the board works 

5. External antenna needed – You need the included GSM antenna for reliable cellular communication 

6. Potential USB power issues – Some users report problems with USB power reliability 

7. No onboard microphone – V1.4 has pins for audio but requires external microphone 

8. No integrated GPS – Location tracking needs external GPS module 

9. Limited GPRS speed – 2G data speeds restrict high-bandwidth applications

10. Australian phase-out – 2G networks are discontinued in Australia and some countries, though 2G remains available in Pakistan

9️⃣ City-Wise Sales Coverage in Punjab

We supply the Ttgo T-call V1.4 ESP32 SIM800L GSM Module Upgraded Version Of V1.3 across all major cities in Punjab province. Tech innovators and IoT developers from Lahore, Faisalabad, Rawalpindi, Multan, Gujranwala, Sialkot, Bahawalpur, Sargodha, Rahim Yar Khan, Sheikhupura, Jhang, Dera Ghazi Khan, Gujrat, Okara, Kasur, Sahiwal, Khanewal, Chiniot, Pakpattan, and Vehari order this ESP32 GSM board for their remote monitoring and communication projects . Our delivery network ensures fast shipping to your doorstep, bringing reliable cellular IoT development tools to innovators across Pakistan.

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