TTGO T-Call ESP32 SIM800L Development Board
TTGO T-Call ESP32 SIM800L overview
The TTGO T-Call ESP32 SIM800L is a Development Board made by SIMCom Wireless. Main ratings: RF Certification FCC/CE/IC/TELEC/KCC/SRRC/NCC; Protocols 802.11 b/g/n/e/i (802.11n up to 150Mbps); Frequency range 2.4 ~ 2.5GHz Bluetooth; Protocols Bluetooth v4.2 BR/EDR and BLE specification. This page brings together the TTGO T-Call ESP32 SIM800L pinout and key specifications, with the full datasheet PDF to preview below or download.
The TTGO T-Call ESP32 SIM800L is an ESP32 development board that combines a SIM800L GSM module and ESP32 Module. Besides Wi-Fi and Bluetooth, you can communicate with this ESP32 board using SMS or phone calls. Additionally, you can connect the ESP32 to the internet using your SIM card data plan. This is great for lot projects that don't have access to a nearby router via Wi-Fi.
The combination of ESP32 and SIM800L GSM / GPRS modem allows the user to create IoT devices that can access a web server not only via Wi-Fi, but also via cellular communication and GPRS. In addition, the finished device can be used to receive and make phone calls (microphone and speaker must be connected separately), send and receive SMS messages, and even listen to an FM radio.
Key specifications
Datasheet
TTGO T-Call ESP32 SIM800L features
- ESP32 240MHz Xtensa® dual-core 32-bit LX6 microprocessor
- USB to TTL CP2104
- USB Type C port for power and programming purposes
- WiFi 4 802.11 b/g/n (2.4 GHz) up to 150 Mbps
- Bluetooth 4.2 Classic + Bluetooth Low Energy (BLE)
- 2G GSM/GPRS via SIMcom SIM800L module + Nano SIM card slot
- Board boot Reset pushbutton
- Supports Nano Sim Cards only
TTGO T-Call ESP32 SIM800L pinout
| Pin | Name | Description |
|---|---|---|
| 1 | 3v3 | Chip Supply Voltage |
| 2 | NC | Not Connected |
| 3 | VP | GP1036/ADCO |
| 4 | VN | GP1039/ADC3 |
| 5 | 34 | GPIC34/ADC6 |
| 6 | 35 | GP1035/ADC7 |
| 7 | 32 | GPI032/ADC4/TOUCH9 |
| 8 | 33 | GPIC33/ADC5/TOUCHS |
| 9 | 25 | GPIC32/ADC18/DACI |
| 10 | 26 | GPIC33/ADC19/DAC2 |
| 11 | 27 | GP1027/ADC17/TOUCH7 |
| 12 | 14 | GP1014/ADC16/TOUCH6 |
| 13 | 12 | GP1012/ADC15/TOUCHS |
| 14 | GND | Ground Pin |
| 15 | 13 | GP1013/ADC14/TOUCH4 |
| 16 | SD2 | SD2 Pin |
| 17 | SD3 | SD3 Pin |
| 18 | CMD | CMD Pin |
| 19 | 5V | Chip Supply Voltage 5V |
| 20 | SPK+ | Speaker +ve pin |
| 21 | SPK- | Speaker -ve Pin |
| 22 | MIC+ | Microphone +ve pin |
| 23 | MIC- | Microphone -ve Pin |
| 24 | CLK | Clock pin |
Show all 42 pins
| Pin | Name | Description |
|---|---|---|
| 25 | SD0 | SD0 Pin |
| 26 | SD1 | SD1 Pin |
| 27 | 15 | GP1015/ADC13/TOUCH3 |
| 28 | 2 | GPI02/ADC12/TOUCH2 |
| 29 | 0 | GPIO0/ADC11/TOUCHI |
| 30 | 4 | GPIO13/ADC10/TOUCH4 |
| 31 | NC | Not Connected |
| 32 | NC | Not Connected |
| 33 | 5 | VSPLSS |
| 34 | 18 | VSPL_SCK |
| 35 | 19 | VSPL_MISO |
| 36 | GND | Ground Pin |
| 37 | 21 | Wire SDA |
| 38 | RXD | G01003/Serial RX |
| 39 | TXD | G01001/Serial TX |
| 40 | 22 | Wire SCL |
| 41 | 33 | VSPI_MOSI |
| 42 | GND | Ground Pin |
TTGO T-Call ESP32 SIM800L specifications
| RF Certification | FCC/CE/IC/TELEC/KCC/SRRC/NCC |
|---|---|
| Protocols | 802.11 b/g/n/e/i (802.11n up to 150Mbps) |
| Frequency range | 2.4 ~ 2.5GHz Bluetooth |
| Protocols | Bluetooth v4.2 BR/EDR and BLE specification |
| Radio | Sensitivity -97 dBm |
| Transmitter power classes | Class-1, class-2 and class-3 |
| Audio | CVSD and SBC |
| Chipset sensors | Hall sensor, temperature sensor |
| Clock generators | quartz 40 MHz |
| Supply voltage | 2.7 ~ 3.6V |
| Average current consumption | 80 mA |
| Minimum rated power supply current | 500 mA |
| Operating temperature range | -40°C ~ +85°C |
| Case size | 18x31.4x3.3mm |
| Wi-Fi Modes | Station/SoftAP/SoftAP+Station/P2P |
| WiFi Security | WPA/WPA2/WPA2-Enterprise/WPS |
| Encryption | AES/RSA/ECC/SHA |
| Development of own software | Development support via cloud server / special SDK (Software Development Kit) |
| Network protocols | IPv4, IPv6, SSL, TCP/UDP/HTTP/FTP/MQTT |
| Supply voltage | 3.7V ~ 4.4V |
| Standby current consumption | 0.7 mA |
| Peak current | 2 A |
| UART speed | 1200 - 115200 baud |
| SIM card format | nanoSIM |
| Operating range | EGSM900, DCS1800, GSM850, PCS1900 |
| Transmission power DCS1800, PCS1900 | 1W |
| Transmission power GSM850, EGSM900 | 2W |
| Network mode | 2G |
TTGO T-Call ESP32 SIM800L applications
- Temperature and moisture monitoring
- Point to point communication
- Smart consumer electronics
- Security Systems
- Intelligent Industrial applications
- Smart Agriculture
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