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Page 11 of 13
 

Page 212

import subprocess
import io


def checkLM75():
    indicator1 = "i2c_arm=on"
    command1 = ["sudo", "dtparam", "i2c_arm=on"]
    indicator2 = "lm75"
    command2 = ["sudo", "dtoverlay", "i2c-sensor", "lm75", "addr=0x48"]
    temp = subprocess.Popen(["sudo", "dtparam", "-l"], stdout=subprocess.PIPE)
    output = str(temp.communicate())
    print(output, flush=True)
    if output.find(indicator1) == -1:
        temp = subprocess.Popen(command1, stdout=subprocess.PIPE)
        output = str(temp.communicate())
        print(output, flush=True)
    if output.find(indicator2) == -1:
        temp = subprocess.Popen(command2, stdout=subprocess.PIPE)
        output = str(temp.communicate())
        print(output, flush=True)


checkLM75()

fdr = io.open("/sys/class/hwmon/hwmon2/temp1_input", "r")
buf = fdr.read()
print(buf)
temp = int(buf) / 1000
print(temp)
fdr.close()

fdw = io.open("/sys/class/hwmon/hwmon2/temp1_max", "w")
fdw.write("19000")
fdw.close()

fdw = io.open("/sys/class/hwmon/hwmon2/temp1_max_hyst", "w")
fdw.write("18000")
fdw.close()

Page 215

import subprocess
import io

def loadHtu21():
    temp = subprocess.Popen(["sudo", "dtparam", "-l"], stdout=subprocess.PIPE)
    output = str(temp.communicate())
    print(output)
    if output.find("htu21") == -1:
        temp = subprocess.Popen( ["sudo", "dtoverlay", "i2c-sensor", "htu21"], stdout=subprocess.PIPE)
        output = str(temp.communicate())
        print(output)
    return

loadHtu21()

fdrt = io.open("/sys/bus/iio/devices/iio:device0/in_temp_input", "r")
print(int(fdrt.read())/1000)
fdrh = io.open( "/sys/bus/iio/devices/iio:device0/in_humidityrelative_input", "r")
print(int(fdrh.read())/1000)