numeric variable value not being fetched

Question

numeric variable value not being fetched

rangathedon opened this issue 7 years ago · 9 comments

numeric variable values are fetched fine on arduino nano but same code does not work on mega; any ideas? any changes needed specifically for mega?

Answer 1 · 2017-08-16T09:46:22.000Z

Does anything work on the Mega?

There is nothing platform specific about the protocol.

Answer 2 · 2017-08-16T10:27:27.000Z

all other things like updating stuff on the display work; only problem is fetching variable values; I try to set the value of a variable on nextion when a button is clicked and in the loop in arduino code I try to get value of the variable; this works very well on the NANO and UNO but on a MEGA it isn't working;

Answer 3 · 2017-08-16T11:13:04.000Z

Does anything that requires receiving work?
Is the code identical on both boards?

Answer 4 · 2017-08-16T16:54:09.000Z

Code is same on both boards;

…

On Wed, Aug 16, 2017 at 4:43 PM, Dan Nixon ***@***.***> wrote: Does anything that requires receiving work? Is the code identical on both boards? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#33 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AWd8IYPGr__aZlJWx8GTnKtxTGDSq2Wjks5sYs7AgaJpZM4O4BHe> .

Answer 5 · 2017-08-16T16:54:37.000Z

I dont really receive anything else so not sure on that

…

On Wed, Aug 16, 2017 at 10:24 PM, techniche ***@***.***> wrote: Code is same on both boards; On Wed, Aug 16, 2017 at 4:43 PM, Dan Nixon ***@***.***> wrote: > Does anything that requires receiving work? > Is the code identical on both boards? > > — > You are receiving this because you authored the thread. > Reply to this email directly, view it on GitHub > <#33 (comment)>, > or mute the thread > <https://github.com/notifications/unsubscribe-auth/AWd8IYPGr__aZlJWx8GTnKtxTGDSq2Wjks5sYs7AgaJpZM4O4BHe> > . >

Answer 6 · 2017-08-17T11:27:05.000Z

tried getting other values; none of the values are being fetched;
m_serialPort.readBytes(temp, sizeof(temp)) is returning 0 in call bool Nextion::receiveNumber(uint32_t *number)
that gave a clue; I am using software serial and certain input pins do not support interrupts on software serial on the mega; looks like thats the issue with not being able to receive; I am able to get the values now after switching to different inputs which support it;

Answer 7 · 2018-01-28T07:41:30.000Z

you solve your problem using which port on Mega ( RX3/TX3 , RX/TX2 or RX/TX1 ) ?

Answer 8 · 2018-01-28T18:05:22.000Z

this is the solution

For UNO
#define UNO_RXPIN 10
#define UNO_TXPIN 11
SoftwareSerial nextionSerial(UNO_RXPIN, UNO_TXPIN); // RX, TX

For MEGA

#define MEGA_RX_PIN 53
#define MEGA_TX_PIN 51

SoftwareSerial nextionSerial(MEGA_RX_PIN, MEGA_TX_PIN); // RX, TX

For Mega do not use RX1/TX1 ,RX2/TX2 and RX3/TX3 !!

Answer 9 · 2018-01-28T18:06:29.000Z

Thank you a lot Dan for your great Library !!