Heating and Ventilation Control

HvcSendI2C

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"""
PWM to control Ebmpapst ventilators in Paul Thermos 200
Dr. Arne Jachens
2020-06-20
"""

#import  smbus
from smbus2 import  SMBus

class HvcSendI2C:
    def  __init__(self):
        self.bus = SMBus(1)              # 0 = /dev/i2c-0 , 1 = /dev/i2c-1
        self.ADDRESS  = 96 #0x60         # address on bus, check: i2cdetect -y 1
        self.REG_MODE = 17 #0x11         # auto increment flag, output logics with pull up resistors


    
    def  setPWM(self,level):
        """
        Set the ventilation level [0:1], where 1 is maximal,
        here both ventilation levels are set equal.
        """

        #level percent to integer
        levelInt = []
        for  i,lev in enumerate(level):
            levelInt.append(int( 255*(1.0-lev) ))

        #compose message bytes
        values=[]
        values.append( 00 )     # frequency of PWM0
        values.append(levelInt[0]) # PWM0
        values.append( 00 )     # frequency of PWM1
        values.append(levelInt[1]) # PWM1
        values.append( 14 )     # xxxx1110 set output0 to PWM0 and output1 to PWM1

        #send message
        self.bus.write_i2c_block_data(self.ADDRESS, self.REG_MODE, values)


"""
for  testing
"""
if __name__ == "__main__":
    I2C = HvcSendI2C()
    level = [0.5, 0.5]
    I2C.setPWM(level)

Index of Library

1	EnergyManager.py
2	HvcControl.py
3	HvcHCSR04ultrasonic.py
4	HvcLightControl.py
5	HvcMain.py
6	HvcMotorDriver.py
7	HvcMqtt.py
8	HvcOneWire.py
9	HvcOperationMode.py
10	HvcRaw2phys.py
11	HvcReadSPI.py
12	HvcSendI2C.py
13	HvcSetGPIO.py
14	HvcTables.py
15	HvcWeather.py
16	HvcWifiRelay.py
17	makeDoc.py

Der gesamte Sourcecode darf gemäß GNU General Public License weiterverbreitet werden.