I'm using ABP2 honeywell pressure sensor ABP2DRRN002ND2B3XX with arduino uno.
I want to use five sensors of the same type simultaneously.
However, the datasheet which include with sensor shows only how to work one sensor.
Could anyone tell me how to work multiple sensors simultaneously with i2c communication?
The following code is included with datasheet.
#include<Arduino.h>
#include<Wire.h>
uint8_t id = 0x28; // i2c address
uint8_t data[7]; // holds output data
uint8_t cmd[3] = {0xAA, 0x00, 0x00}; // command to be sent
double press_counts = 0; // digital pressure reading [counts]
double temp_counts = 0; // digital temperature reading [counts]
double pressure = 0; // pressure reading [bar, psi, kPa, etc.]
double temperature = 0; // temperature reading in deg C
double outputmax = 15099494; // output at maximum pressure [counts]
double outputmin = 1677722; // output at minimum pressure [counts]
double pmax = 1; // maximum value of pressure range [bar, psi, kPa, etc.]
double pmin = 0; // minimum value of pressure range [bar, psi, kPa, etc.]
double percentage = 0; // holds percentage of full scale data
char printBuffer[200], cBuff[20], percBuff[20], pBuff[20], tBuff[20];
void setup() {
Serial.begin(9600);
while (!Serial) {
delay(10);
}
Wire.begin();
sprintf(printBuffer, "\nStatus Register, 24 - bit Sensor data, Digital Pressure Counts,\
Percentage of full scale pressure, Pressure Output, Temperature\n");
Serial.println(printBuffer);
}
void loop() {
Wire.beginTransmission(id);
int stat = Wire.write (cmd, 3); // write command to the sensor
stat |= Wire.endTransmission();
delay(10);
Wire.requestFrom(id, 7); // read back Sensor data 7 bytes
int i = 0;
for (i = 0; i < 7; i++) {
data [i] = Wire.read();
}
press_counts = data[3] + data[2] * 256 + data[1] * 65536; // calculate digital pressure counts
temp_counts = data[6] + data[5] * 256 + data[4] * 65536; // calculate digital temperature counts
temperature = (temp_counts * 200 / 16777215) - 50; // calculate temperature in deg c
percentage = (press_counts / 16777215) * 100; // calculate pressure as percentage of full scale
//calculation of pressure value according to equation 2 of datasheet
pressure = ((press_counts - outputmin) * (pmax - pmin)) / (outputmax - outputmin) + pmin;
dtostrf(press_counts, 4, 1, cBuff);
dtostrf(percentage, 4, 3, percBuff);
dtostrf(pressure, 4, 3, pBuff);
dtostrf(temperature, 4, 3, tBuff);
/*
The below code prints the raw data as well as the processed data
Data format : Status Register, 24-bit Sensor Data, Digital Counts, percentage of full scale
pressure,
pressure output, temperature
*/
sprintf(printBuffer, " % x\t % 2x % 2x % 2x\t % s\t % s\t % s\t % s \n", data[0], data[1], data[2],
data[3],
cBuff, percBuff, pBuff, tBuff);
Serial.print(printBuffer);
delay(10);
}
