Sensors with ARTIK IDE
ARTIK modules provide connection capability for analog inputs and various digital inputs and outputs, as well as I2C, UART, and SPI connections. The ARTIK 053 starter board includes headers with an Arduino-friendly layout that lets you easily add readily available sensors as we show below.
Grove Base Shield
The Grove Base Shield and sensors in this article are compatible with the ARTIK 053 starter kit board. You use C language example code to read these sensors.
To get started, take a look at the Sensor Board sample application code provided. It's pretty straightforward code so you'll figure out quickly how to modify it to suit your needs.
|Temperature Sensor||UV Sensor||Moisture Sensor||Light Sensor||Rotary Angle Sensor||Luminance Sensor|
The command below prints out analog sensor reading from channel 1-4. These four channels match the A0-A3 analog pins on the Grove Base shield.
The first thing you'll want to do is add a delay between loops such as
sleep(1); so that you can see the results.
nsamples=4 Sample: 1: channel: 3, value: 14 2: channel: 0, value: 1963 3: channel: 1, value: 85 4: channel: 3, value: 16 nsamples=4 Sample: 1: channel: 0, value: 1962 2: channel: 1, value: 84 3: channel: 2, value: 5 4: channel: 2, value: 7 nsamples=4 Sample: 1: channel: 3, value: 17 2: channel: 0, value: 1962 3: channel: 1, value: 85 4: channel: 1, value: 85
You can change the source code here to only listen for selected channels.
MPU9250 I2C accelerometer support has been integrated in the ARTIK 053 code base. By using
sensor sample code, you can read the accelerometer XYZ raw data, and calculate Euler angles by using the data.
If you read through
i2c_mpu9250.c, you can find in the
mpu9250_main() function that the code sets the default I2C port number to be 1, which refers to the SCL/SDA pins on header CON703. Changing the default port number to 0 will enable the I2C pins on header CON708.
Attach a Grove IMU 9DOF V2.0 motion tracking module to the I2C connector next to D8 on your base shield, and you can read accelerometer raw data by using the command below.
ACC: X Y Z ACC: -10796 280 17092 readbytes: readbytes: 1 readbytes: readbytes: 2 readbytes: readbytes: 1 readbytes: readbytes: 2 readbytes: readbytes: 1 readbytes: readbytes: 2 ACC: 476 292 17120 readbytes: readbytes: 1 readbytes: readbytes: 2 readbytes: readbytes: 1 readbytes: readbytes: 2 readbytes: readbytes: 1 readbytes: readbytes: 2 ACC: 512 260 17028 …
|Grove LED Socket Kit|
Digital pins can be operated via the
sensor example as well. Here are some of the mappings for these pins.
ARD pin 2 – gpio 46 ARD pin 4 – gpio 47 ARD pin 7 – gpio 48 ARD pin 8 – gpio 50
The command below can pull the readings from a specific GPIO pin.
You'll find several pulse width modulator (PWM) circuit output pins that can be tested with an external buzzer circuit using this command.