Tracker01

Hardware

1 pi zero

1 INA219 current sensor.

1 HTU21 temp/humidity sensor

1 ADS1015 with two Photo Resistors

System config

All devices are i2c.

Address Device

pi@raspberrypi:~/Adafruit_Python_ADS1x15/examples $ i2cdetect -l
i2c-1   i2c             bcm2835 I2C adapter                     I2C adapter
pi@raspberrypi:~/Adafruit_Python_ADS1x15/examples $ i2cdetect -F 1
Functionalities implemented by /dev/i2c-1:
I2C                              yes
SMBus Quick Command              yes
SMBus Send Byte                  yes
SMBus Receive Byte               yes
SMBus Write Byte                 yes
SMBus Read Byte                  yes
SMBus Write Word                 yes
SMBus Read Word                  yes
SMBus Process Call               yes
SMBus Block Write                yes
SMBus Block Read                 no
SMBus Block Process Call         no
SMBus PEC                        yes
I2C Block Write                  yes
I2C Block Read                   yes
pi@raspberrypi:~/Adafruit_Python_ADS1x15/examples $ i2cdetect 1
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-1.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: 40 41 -- -- -- -- -- -- 48 -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
pi@raspberrypi:~/Adafruit_Python_ADS1x15/examples $

References

• https://arduino.stackexchange.com/questions/24888/counting-adc-samples-using-a-light-sensor