Single-Ended Sample

This sample demonstrates measuring single-ended analog inputs from analog pads.

To run the sample:

  1. Copy the sample code to a folder on the Raspberry Pi.

  2. Open terminal, and then go to the folder you copied the sample.

  3. Run the sample with the following command:

python3 analog_single_ended.py

Sample Code

analog_single_ended.py
#!/usr/bin/env python3
#This sample demonstrates measuring single-ended analog inputs from analog pads.
#Install Proto HAT library with "pip3 install turta-protohat"
#Raspberry Pi Configuration
# - You should enable SPI and I2C from the Raspberry Pi's configuration.
# To do so, type 'sudo raspi-config' to the terminal, then go to 'Interfacing Options' and enable both SPI and I2C.
from time import sleep
from turta_protohat import Turta_Analog
#Initialize
analog = Turta_Analog.ADC()
try:
while True:
#Read analog channel 1
a1 = analog.read(Turta_Analog.CH.SINGLE_1)
#Read analog channel 2
a2 = analog.read(Turta_Analog.CH.SINGLE_2)
#Read analog channel 3
a3 = analog.read(Turta_Analog.CH.SINGLE_3)
#Read analog channel 4
a4 = analog.read(Turta_Analog.CH.SINGLE_4)
#Read board temperature
board_temp_c = analog.read_temperature()
board_temp_f = analog.read_temperature(True)
#Print the readings
print("Analog Input 1..: " + str(a1))
print("Analog Input 2..: " + str(a2))
print("Analog Input 3..: " + str(a3))
print("Analog Input 4..: " + str(a4))
print("Board Temp......: " + str(round(board_temp_c, 1)) + "C" + \
" / " + str(round(board_temp_f, 1)) + "F")
#Wait
print("-----")
sleep(0.5)
#Exit on CTRL+C
except KeyboardInterrupt:
print('Bye.')

Result

When you run the sample, it prints analog readings from all analog inputs. The example output should be like this:

Analog Input 1..: 0
Analog Input 2..: 0
Analog Input 3..: 0
Analog Input 4..: 0
Board Temp......: 0C / 0F

To stop the Python script, just press CTRL + C.