ESP32 Forum

Posted: **Wed Jan 30, 2019 7:12 am**

dear sir, I tried to use UART#2 and relocate RX to pin 5 and TX to pin17. anyway the compiler shows error below.
Don't know what is wrong or what to include to code please help. thanks in advance.
board: heltec wifi kit32 (esp32 with OLED
)
best regards
Newprasertkitt

HardwareSerial mySerial2(2);
mySerial2.begin(9600,SERIAL_8N1,5,7);

sketch_Jan28_ESP32_fingerprintSS_01:10: error: 'mySerial2' does not name a type
mySerial2.begin(9600,SERIAL_8N1,5,7);

^
exit status 1
'mySerial2' does not name a type

Posted: **Wed Jan 30, 2019 6:53 pm**

This works fine for me:

Code: Select all

HardwareSerial Pzemserial(2);
#define RXD2 16 //Gpio pins Serial2
#define TXD2 17
Pzemserial.begin(9600, SERIAL_8N1, RXD2, TXD2);

Posted: **Thu Jan 31, 2019 2:48 am**

Hi edje11:thank you for your help,but this Pzem still got error.
mine, version arduino is 1.8.5, what is yours

best regards
newprasertkitt

exit status 1
'Pzemserial' does not name a type

Posted: **Fri Feb 01, 2019 11:44 pm**

Hi!
try https://github.com/G6EJD/ESP32-Using-Ha ... rial-Ports

Posted: **Sun Feb 03, 2019 1:47 pm**

Hi all, I got it.
just need to put the line in Setup function!.

setup {

mySerial2.begin(9600,SERIAL_8N1,5,7);

}

best regards
NewPrasertKitt

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