03-28-2026, 01:38 AM
if you don't use 4G module, you can use GSM RXD,TXD for Nextion display.
GSM:
RXD:GPIO15
TXD:GPIO13
5V also can get from 4G module socket, there is "V" is 5v. T is "TXD". R is "RXD"
GSM:
RXD:GPIO15
TXD:GPIO13
5V also can get from 4G module socket, there is "V" is 5v. T is "TXD". R is "RXD"
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