This example shows how to use WisBlock IO RAK1920, which is a MikroBUS/Grove/QWIIC adapter board, to connect with a MicroBUS interface sensor.
To test the RAK1920, The following hardware is required.
- WisBlock Base RAK5005-O * 1pcs
- WisBlock Core RAK4631 * 1pcs
- WisBlock IO RAK1920 * 1pcs
- Thermo 3 click * 1pcs
RAK1920 is a Mikrobus/Grove/QWIIC adapter board which can be connected to Mikrobus/Grove/QWIIC sensor. This guide shows how to use Mikrobus sensor with WisBlock. Here we choose Thermo 3 click from https://www.mikroe.com/thermo-3-click. Thermo 3 click carries TMP102, a digital temperature sensor IC with a tiny footprint of only 1.6mm x 1.6mm. The click is designed to run on a 3.3V power supply only. It communicates with the target MCU through mikroBUS™ I2 C pins (SCL, SDA), and an additional Alert pint (INT on the default mikroBUS™ configuration). Without requiring calibration, TMP102 is accurate within 0.5°C. Measurement range is between -25°C to 85°C. An integrated 12-bit ADC allows for measurement resolutions down to 0.0625°C.
To test the RAK1920, The following software is required.
- ArduinoIDE
- RAK4630 BSP
- SparkFun TMP102 Breakout library
The Arduino test software is written as follow:
#include <Wire.h> // Used to establied serial communication on the I2C bus
#include <SparkFunTMP102.h> // Click here to get the library: http://librarymanager/All#SparkFun_TMP102
TMP102 sensor0;
void setup() {
Serial.begin(115200);
while(!Serial){delay(10);}
Wire.begin(); //Join I2C Bus
/* The TMP102 uses the default settings with the address 0x48 using Wire.
Optionally, if the address jumpers are modified, or using a different I2C bus,
these parameters can be changed here. E.g. sensor0.begin(0x49,Wire1)
It will return true on success or false on failure to communicate. */
while(!sensor0.begin())
{
Serial.println("Cannot connect to TMP102.");
Serial.println("Is the board connected? Is the device ID correct?");
delay(1000);
}
Serial.println("Connected to TMP102!");
delay(100);
// Initialize sensor0 settings
// set the number of consecutive faults before triggering alarm.
// 0-3: 0:1 fault, 1:2 faults, 2:4 faults, 3:6 faults.
sensor0.setFault(0); // Trigger alarm immediately
// set the polarity of the Alarm. (0:Active LOW, 1:Active HIGH).
sensor0.setAlertPolarity(1); // Active HIGH
// set the sensor in Comparator Mode (0) or Interrupt Mode (1).
sensor0.setAlertMode(0); // Comparator Mode.
// set the Conversion Rate (how quickly the sensor gets a new reading)
//0-3: 0:0.25Hz, 1:1Hz, 2:4Hz, 3:8Hz
sensor0.setConversionRate(2);
//set Extended Mode.
//0:12-bit Temperature(-55C to +128C) 1:13-bit Temperature(-55C to +150C)
sensor0.setExtendedMode(0);
//set T_HIGH, the upper limit to trigger the alert on
sensor0.setHighTempF(85.0); // set T_HIGH in F
//set T_LOW, the lower limit to shut turn off the alert
sensor0.setLowTempF(84.0); // set T_LOW in F
}
void loop()
{
float temperature;
boolean alertPinState, alertRegisterState;
// Turn sensor on to start temperature measurement.
// Current consumtion typically ~10uA.
sensor0.wakeup();
// read temperature data
//temperature = sensor0.readTempF();
temperature = sensor0.readTempC();
// Place sensor in sleep mode to save power.
// Current consumtion typically <0.5uA.
sensor0.sleep();
// Print temperature and alarm state
Serial.print("Temperature: ");
Serial.println(temperature);
delay(1000); // Wait 1000ms
}
It will get temperature per 1s and print. The test results are as follows：
09:46:54.698 -> Connected to TMP102!
09:46:54.794 -> Temperature: 25.38
09:46:55.770 -> Temperature: 25.38
09:46:56.777 -> Temperature: 25.38
09:46:57.806 -> Temperature: 25.38
09:46:58.803 -> Temperature: 25.38
09:46:59.810 -> Temperature: 25.31
09:47:00.808 -> Temperature: 25.38
09:47:01.809 -> Temperature: 25.38
09:47:02.810 -> Temperature: 25.38
09:47:03.820 -> Temperature: 25.38
09:47:04.830 -> Temperature: 25.38