I encountered issues while using the AC Current Click sensor. I utilized
the sample provided by MikroE but adapted it for Arduino. The problem is
that the sensor does not send any data until I press on the sensor, at
which point it sends some values even when the cable is not connected to
measure the current. Could you provide any information or suggestions to
help resolve this issue?
My code :
#include <SPI.h>
// Définition des broches (à adapter selon votre câblage)
const int CS_PIN = 10; // Chip Select pour le module SPI
const int AN_PIN = A0; // Pin analogique pour la lecture (si nécessaire)
// Paramètres SPI
const int SPI_SPEED = 1000000; // 1 MHz
// Constantes spécifiques à l'application
#define ACCURRENT_ADC_ITERATIONS 10
#define ACCURRENT_ADC_RESOLUTION 0x0FFF
#define ACCURRENT_AC_TO_DC_V_SCALE 1.8f
#define ACCURRENT_SENSOR_RESOLUTION 30.0f
#define ACCURRENT_A_TO_MA_SCALE 1000.0f
void setup() {
// Initialiser la communication SPI
Serial.begin(9600);
SPI.begin();
SPI.beginTransaction(SPISettings(SPI_SPEED, MSBFIRST, SPI_MODE0));
pinMode(CS_PIN, OUTPUT);
digitalWrite(CS_PIN, HIGH); // Désactiver le CS au démarrage
// Initialiser les autres broches si nécessaire
pinMode(AN_PIN, INPUT);
}
void loop() {
// Exemple de lecture de courant
float current = accurrent_get_a();
float current_ma = current * ACCURRENT_A_TO_MA_SCALE;
Serial.print(current);
Serial.println(" A");
Serial.print(current_ma);
Serial.println(" mA");
delay(1000); // Délai entre les lectures, ajustez selon les besoins
}
float accurrent_get_a() {
uint8_t data_buf[2] = {0};
float avg = 0;
uint32_t sum = 0;
for (uint8_t cnt = 0; cnt < ACCURRENT_ADC_ITERATIONS; cnt++) {
digitalWrite(CS_PIN, LOW); // Activer le CS
SPI.transfer(data_buf, 2); // Lire 2 octets
digitalWrite(CS_PIN, HIGH); // Désactiver le CS
sum += (((uint16_t)data_buf[0] << 8) | data_buf[1]) & ACCURRENT_ADC_RESOLUTION;
}
avg = (float)(sum / ACCURRENT_ADC_ITERATIONS);
avg = ((avg / ACCURRENT_ADC_RESOLUTION) / ACCURRENT_AC_TO_DC_V_SCALE) * ACCURRENT_SENSOR_RESOLUTION;
return avg; // Retourne la valeur moyenne ADC
}
Please show a schematic of how you have the MikroE module and the Arduino connected together. Also show some good photographs of all relevant connections.
This sounds like bad connections. The photos requested above are important.
I suspect the pin thickness on the DuPont cables you're using is on the thin side, causing intermittent contact problems especially on the Arduino side, but possibly also on the breadboard.
If you want use that board with the R4 you need to power it with 5V NOT 3.3V.
You need to switch the jumper on the board to 5V.
Operating it at 3.3V and connecting it to the R4 may damage the R4 and/or click board.
Then you will find it difficult to do it right and you may wind up damaging the board.
I will give you two choices:
Remove the 3V3 jumper and solder in the 5V.
Connect 5V to the 3.3V input, but it may or may not burn out the board
For nunber 2, according to the schematic of the click board, there is no difference between the 3.3V and 5V connections. However I'm not sure why they provided a jumper. If the schematics are correct it will work with 5V on the 3V3 connection. If the schematics are wrong, it may burn out the board.
Yes, I noticed that they mentioned there's no difference between the two inputs. So, should I connect the 3.3V to the 5V input of the AC Current Click sensor?
