Tracker01: Difference between revisions
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1 ADS1015 with two [https://en.wikipedia.org/wiki/Photoresistor Photo Resistors] | 1 ADS1015 with two [https://en.wikipedia.org/wiki/Photoresistor Photo Resistors] | ||
[[Image:tracker01_whole_setup.jpg]] | |||
== Light Dependent Resistor Tests == | |||
Lit room to dark room voltage drop: | |||
resistor lots of light lit dark | |||
--- --- --- --- | |||
1k 1.72V 3.26V 3.27V | |||
23k 1.13V 3.17V 3.2V | |||
Photo: | |||
[[Image:ldr_resistors.jpg]] | |||
== System config == | == System config == | ||
apt-get install i2c-tools | |||
All devices are i2c. | All devices are i2c. | ||
Address Device | Address Device | ||
0x40 HTU21 ( hardcoded, static ) | |||
0x41 INA219 ( defaults to 0x40, I shorted A0 toget 0x41 ) | |||
0x48 ADS1015 ( default ) | |||
<pre> | <pre> | ||
| Line 51: | Line 72: | ||
pi@raspberrypi:~/Adafruit_Python_ADS1x15/examples $ | pi@raspberrypi:~/Adafruit_Python_ADS1x15/examples $ | ||
</pre> | </pre> | ||
[[INA219 test.py]] | |||
== Code == | == Code == | ||
[[Htu21d.py]] | |||
== References == | == References == | ||
* https://arduino.stackexchange.com/questions/24888/counting-adc-samples-using-a-light-sensor | * https://arduino.stackexchange.com/questions/24888/counting-adc-samples-using-a-light-sensor | ||
* https://www.digikey.ca/en/resources/conversion-calculators/conversion-calculator-resistor-color-code-5-band | |||
Also See: | |||
* https://github.com/drthornt/htu21d-exporter | |||
Latest revision as of 14:07, 10 July 2020
Hardware
1 pi zero
1 INA219 current sensor.
1 HTU21 temp/humidity sensor
1 ADS1015 with two Photo Resistors
Light Dependent Resistor Tests
Lit room to dark room voltage drop:
resistor lots of light lit dark --- --- --- --- 1k 1.72V 3.26V 3.27V 23k 1.13V 3.17V 3.2V
Photo:
System config
apt-get install i2c-tools
All devices are i2c.
Address Device 0x40 HTU21 ( hardcoded, static ) 0x41 INA219 ( defaults to 0x40, I shorted A0 toget 0x41 ) 0x48 ADS1015 ( default )
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 $
Code
References
Also See:
