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TTGO T-Call ESP32 SIM800L Development Board

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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

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
Interfaces
SD card, UART, SPI, SDIO, I2C, LED PWM, motor control PWM, I2S, IR GPIO, capacitive touch sensor, ADC, DAC, low noise preamplifier

Datasheet

datasheet-sim800l.pdf
Format PDFSize 2.7 MBLanguage EN
Third-party / unverified source

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

PinNameDescription
13v3Chip Supply Voltage
2NCNot Connected
3VPGP1036/ADCO
4VNGP1039/ADC3
534GPIC34/ADC6
635GP1035/ADC7
732GPI032/ADC4/TOUCH9
833GPIC33/ADC5/TOUCHS
925GPIC32/ADC18/DACI
1026GPIC33/ADC19/DAC2
1127GP1027/ADC17/TOUCH7
1214GP1014/ADC16/TOUCH6
1312GP1012/ADC15/TOUCHS
14GNDGround Pin
1513GP1013/ADC14/TOUCH4
16SD2SD2 Pin
17SD3SD3 Pin
18CMDCMD Pin
195VChip Supply Voltage 5V
20SPK+Speaker +ve pin
21SPK-Speaker -ve Pin
22MIC+Microphone +ve pin
23MIC-Microphone -ve Pin
24CLKClock pin
Show all 42 pins
PinNameDescription
25SD0SD0 Pin
26SD1SD1 Pin
2715GP1015/ADC13/TOUCH3
282GPI02/ADC12/TOUCH2
290GPIO0/ADC11/TOUCHI
304GPIO13/ADC10/TOUCH4
31NCNot Connected
32NCNot Connected
335VSPLSS
3418VSPL_SCK
3519VSPL_MISO
36GNDGround Pin
3721Wire SDA
38RXDG01003/Serial RX
39TXDG01001/Serial TX
4022Wire SCL
4133VSPI_MOSI
42GNDGround 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

TTGO T-Call ESP32 SIM800L datasheet PDF preview

PDF · 2.7 MB

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