我对 Nextion NX4024T032_011 有疑问。我可以从 Nextion 向 Arduino 发送数据,但问题是 arduino 中的 Tx led 闪烁。就我在串行端口上观察到的,来自 arduino 的数据不被 Nextion 接受,我只能在打开串行监视器后看到“recvRetCommandFinished err”:recvRetCommandFinished err
在 nextion 中创建的 GUI 是:Nextion GUI
如果我按下串行监视器中的按钮,我可以查看:串行输出但数字未打印并且在显示中增加或减少
我正在使用这个库:Arduino mega 2560 的 Nextion 库,使用Serial2进行通信
NexConfig.h
#define nexSerial Serial2
Arduino代码:
#include "Nextion.h"
void t0PopCallback(void *ptr);
void b0PopCallback(void *ptr);
void b1PopCallback(void *ptr);
NexText t0 = NexText(0, 3, "t0");
NexButton b0 = NexButton(0, 1 ,"b0");
NexButton b1 = NexButton(0, 2, "b1");
char buffer[100] = {0};
NexTouch *nex_listen_list[] =
{
&t0,
&b0,
&b1,
NULL
};
void t0PopCallback(void *ptr)
{
dbSerialPrintln("t0PopCallback");
t0.setText("50");
}
void b0PopCallback(void *ptr)
{
uint16_t len;
uint16_t number;
dbSerialPrintln("b0PopCallback");
memset(buffer, 0, sizeof(buffer));
t0.getText(buffer, sizeof(buffer));
number = atoi(buffer);
number += 1;
memset(buffer, 0, sizeof(buffer));
itoa(number, buffer, 10);
t0.setText(buffer);
digitalWrite(LED_BUILTIN, HIGH);
}
void b1PopCallback(void *ptr)
{
uint16_t len;
uint16_t number;
dbSerialPrintln("b1PopCallback");
memset(buffer, 0, sizeof(buffer));
t0.getText(buffer, sizeof(buffer));
number = atoi(buffer);
number -= 1;
memset(buffer, 0, sizeof(buffer));
itoa(number, buffer, 10);
t0.setText(buffer);
digitalWrite(LED_BUILTIN, LOW);
}
void setup(void)
{
pinMode(LED_BUILTIN,OUTPUT);
nexInit();
t0.attachPop(t0PopCallback);
b0.attachPop(b0PopCallback);
b1.attachPop(b1PopCallback);
dbSerialPrintln("setup done");
}
void loop(void)
{
nexLoop(nex_listen_list);
}
在recvRetCommandFinished err 中将 err更改为OK的任何提示