TTGO T-Call V1.3 ESP32 & SIM800L Wireless Module (with Antenna) DC power socket and polarity protection Applications

and polarity protection Applications

These are Carbon Film Resistor with a value of 200k ohm 1/4W and tolerance of ±5%

Have external power on reset pin(RST pin)

Gold for these 820K resistors

Two 8-bit Timer/Counters with Separate Prescaler and compare mod

TTGO T-Call V1.3 ESP32 & SIM800L Wireless Module (with Antenna) DC power socket and polarity protection ApplicationsTTGO T call is a modified ESP32 (ESP WROVER B 8MB PSRAM) development board with an integrated SIM800L 2G GPRS module. The USB Type C pluggable board includes an integrated LiPo Battery Charging Circuit & Connector and is an excellent solution for developing IoT Applications. Aside from Wi Fi and Bluetooth, you may use GSM GPRS technology to communicate with this development board, and you can connect it to the internet using your SIM card data plan.