[英]Corrupted value in Arduino array
该程序应该不断收听来自花盆中土壤湿度传感器的433 MHz消息,并根据这些读数来决定是否激活泵。
另外,它应该在收听时检查有线水传感器。
所有收到的433 MHz消息应存储在数组sensor_data[i]
。
在启动时,位置1
到NUM_Sensors
(在这种情况下为3)填充有常量int NO_DATA
(500)。
问题是,由于某种原因,我损坏了阵列编号3中的数字:
串行打印:
Wired Flower Pots Checked
All Sensors or Timeout reached
Array_Print: 500
Array_Print: 500
Array_Print: 30001
在这种情况下,30001出现在阵列中没有特定原因(我想)。.没有收到消息。
这是更改为最少的代码,以便发生错误:
#include <RCSwitch.h>
RCSwitch mySwitch = RCSwitch();
//Receiver Setup for wireless soil moisture readings
unsigned long last_ground_check = 0;
const int NUM_SENSORS = 3;
const uint32_t SENSOR_TIMEOUT = 30000;
int sensor_data[NUM_SENSORS];
uint32_t last_message_time = 0;
uint32_t elapsed = 0;
float total_value = 0;
float real_value = 0;
int count = 0;
const int NO_DATA = 500;
boolean received = false;
//###################//
void setup()
{
Serial.begin(9600);
mySwitch.enableReceive(INT1); // Interrupt 2 = Pin 2
delay(1500);
Serial.println("<><><><><><><><><><><><>");
Serial.println(" Start ");
Serial.println("<><><><><><><><><><><><>");
for (int i = 0; i <= NUM_SENSORS; i++) {
sensor_data[i] = NO_DATA;
}
} // Setup END
void loop()
{
if (received == false) {
if (millis() - last_ground_check > 10000) {
Serial.println("Checking Wired Flower Pot");
}
Serial.println("Wired Flower Pots Checked");
last_ground_check = millis();
}
if (mySwitch.available()) { // Start whenever a 433 MHz Message is received
received = true;
double value = mySwitch.getReceivedValue();
delay(1000);
int sensor_id = 1;
int sensor_value = 2;
if (sensor_value >= 0 && sensor_value <= 100) {
sensor_data[sensor_id] = sensor_value;
last_message_time = millis();
mySwitch.resetAvailable();
}
}
byte sensors_reported = 0;
for (int i = 0; i <= NUM_SENSORS; i++) {
if (NO_DATA != sensor_data[i]) {
sensors_reported += 1; // CODE Gets here because of corrupted Array Value although no message was received
}
}
if (sensors_reported != 0) {
uint32_t elapsed = millis() - last_message_time;
if (NUM_SENSORS == sensors_reported || elapsed > SENSOR_TIMEOUT) {
Serial.println("All Sensors or Timeout reached");
for (int i = 1; i <= NUM_SENSORS; i++) {
Serial.print("Array_Print: ");
Serial.println(sensor_data[i]);
}
for (int i = 1; i <= NUM_SENSORS; i++) {
if (sensor_data[i] < NO_DATA) {
count++;
total_value += sensor_data[i];
}
}
real_value = total_value / count;
Serial.print("Soil Moisture: ");
Serial.println(real_value);
if (real_value <= 20) {
//Set Pump ON
}
for (int i = 1; i <= NUM_SENSORS; i++) {
sensor_data[i] = NO_DATA;
}
total_value = 0;
real_value = 0;
sensors_reported = 0;
count = 0;
received = false;
Serial.println("RESET #### RESET ####");
delay(5000);
}
}
} //LOOP
首先分配大小为NUM_SENSORS=3
的数组,然后继续使用它,就好像大小为4。
您的数组具有3个元素sensor_data[0]
, [1]
和[2]
。 您的循环条件i <= NUM_SENSORS
导致访问sensor_data[3]
,这只是最后一个数组元素之后的一些内存。 即使在设置中设置了sensor_data[3]
,如果其他变量引用了相同的存储器,则NO_DATA
也将被覆盖。
索引从i = 0
到i < NUM_SENSORS
的数据数组的循环。
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