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Xinyuan-LilyGO / LilyGo-T-Call-SIM800

https://www.aliexpress.com/item/33045221960.html
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Are there UART availables on TTGO T-CALL SIM800L board ? #127

Closed clabnet closed 3 years ago

clabnet commented 3 years ago

Hi,

I need to use integrated modem of TTGO T-CALL SIM800L board and another serial device.

Are there available UART(s) for connecting via serial to this board ? If yes, what are the PIN(s) ?

Thank you, regards

LilyGO commented 3 years ago

The serial port is also available, and you need to define it. Serial2.begin(115200, SERIAL_8N1, RX_PIN, TX_PIN);

lmorejon01 commented 5 months ago

Hi all, please I need some help, I am testing ESP32 T Call SIM800 L with 2 PZEM 004T ( they have serial port RS232 TTL level each one), the electrical data from the PZEM I want to send via GSM network, the problem is I can´t get success connecting 2 PZEM with serial port...only operate 1 PZEM, I define one serial port in pins RX like GPIO 14 and TX like GPIO 12, Can I define other serial port by software or hardware in others GPIO? thanks in advance Best Kind Regards from Guayaquil Ecuador Lenin Morejon