created class, removed a few unneccesary rows

In order to make edits to class readable i commit this mostly white
space edit. Further more it removes a few application specific or
testing lines.

README.md

@@ -10,3 +10,5 @@ It currently lacks support for many features features and is more of a crude dem
 * reading raw-values
 
 If you have the AdaFruit board with built in level shifters and voltage regulator it is should work if you just plug in [SDA to pin 3, SCL to pin 5, VCC to pin 17 and GND to pin 20](https://pinout.xyz/pinout/i2c). You should then be able to find the SGP30 an address 0x58 using `i2cdetect -y 1`. If you get an error message  you probbably need to enable i2c in the kernel using  [`raspi-config` and reboot](https://learn.sparkfun.com/tutorials/raspberry-pi-spi-and-i2c-tutorial)
+
+After 12 hours of run time the base-line data is saved once every hour as per the "device driver integration guide". The data is saved as json to ~/sgp_config_data.txt

sgp30/sgp30.py

@@ -2,7 +2,6 @@ import smbus2
 from smbus2 import SMBusWrapper, SMBus, i2c_msg
 from collections import namedtuple 
 from functools import partial
-#import Adafruit_PureIO.smbus as adabus
 from time import sleep, asctime,time
 import json
 from copy import copy
@@ -15,18 +14,19 @@ BASELINE_FILENAME = os.path.expanduser("~/sgp_config_data.txt")
 #print bus.write_byte_datadata(DEVICE_ADDR, 0x00, 0x01)
 #self._i2c_read_words_from_cmd([0x36, 0x82], 0.01, 3)
 
-Sgp30Cmd = namedtuple("Sgp30Cmd",["commands","replylen","waittime"])
+class Sgp30():
-GET_SERIAL=Sgp30Cmd([0x36, 0x82],6,10)
+    Sgp30Cmd = namedtuple("Sgp30Cmd",["commands","replylen","waittime"])
-GET_FEATURES=Sgp30Cmd([0x20, 0x15],2,2)
+    GET_SERIAL=Sgp30Cmd([0x36, 0x82],6,10)
-IAQ_INIT=Sgp30Cmd([0x20, 0x03],0,10)
+    GET_FEATURES=Sgp30Cmd([0x20, 0x15],2,2)
-IAQ_MEASURE=Sgp30Cmd([0x20, 0x08],6,12)
+    IAQ_INIT=Sgp30Cmd([0x20, 0x03],0,10)
-IAQ_SELFTEST=Sgp30Cmd([0x20, 0x32],3,520)
+    IAQ_MEASURE=Sgp30Cmd([0x20, 0x08],6,12)
-GET_BASELINE=Sgp30Cmd([0x20, 0x15],6,120)
+    IAQ_SELFTEST=Sgp30Cmd([0x20, 0x32],3,520)
-SET_BASELINE=Sgp30Cmd([0x20, 0x1e],0,10)
+    GET_BASELINE=Sgp30Cmd([0x20, 0x15],6,120)
+    SET_BASELINE=Sgp30Cmd([0x20, 0x1e],0,10)
 
-Sgp30Answer = namedtuple("Sgp30Answer",["data","raw"])
+    Sgp30Answer = namedtuple("Sgp30Answer",["data","raw"])
 
-def read_write(cmd,bus,addr=DEVICE_ADDR):
+    def read_write(cmd,bus,addr=DEVICE_ADDR):
         write = i2c_msg.write(addr,cmd.commands)
         if cmd.replylen <= 0 :
            bus.i2c_rdwr(write)
@@ -39,7 +39,7 @@ def read_write(cmd,bus,addr=DEVICE_ADDR):
             answer = [i<<8 | j for i,j in zip(r[0::3],r[1::3])]
             return Sgp30Answer(answer,r)
 
-def try_set_baseline():
+    def try_set_baseline():
         try:
             with open(BASELINE_FILENAME,"w") as conf:
                 baseline=json.load(conf)
@@ -54,7 +54,7 @@ def try_set_baseline():
                 print("Loading baseline data into sensor")
                 rw(baseline_cmd)
 
-def init_sgp(bus):
+    def init_sgp(bus):
         print("Initializing SGP30")
         rw(IAQ_INIT)
         print("Waiting for sensor warmup")
@@ -62,8 +62,7 @@ def init_sgp(bus):
         #print(rw(SET_BASELINE))
         sleep(15)
 
-def i2c_geral_call(bus):
+    def i2c_geral_call(bus):
-    print("resetting bus")
         bus.write_byte(0,0x06)
         sleep(.1)
 
@@ -73,13 +72,10 @@ def store_baseline(n):
             baseline= rw(GET_BASELINE)
             json.dump(baseline.raw,conf)
 
-def http_post_data(url="http://localhost/setdata"):
+if __name__ == "__main__":
-    try:
+    main()
-        requests.get(url,params={"co2": co2eq,"tvoc":tvoc},timeout=.5)
+main():
-    except:
+    with SMBusWrapper(1) as bus:
-        pass
-
-with SMBusWrapper(1) as bus:
         rw=partial(read_write,bus=bus)
         i2c_geral_call(bus)
         print("Features: %s"%repr(rw(GET_FEATURES)))
@@ -90,10 +86,7 @@ with SMBusWrapper(1) as bus:
         print(rw(IAQ_MEASURE))
         print("Testing meassure again")
         sleep(1)
-    print(rw(IAQ_MEASURE))
-    sleep(1)
         print("Running")
-    with open("/tmp/air.txt","w") as f:
         n=0
         while(True):
             start = time()
@@ -102,9 +95,8 @@ with SMBusWrapper(1) as bus:
             res = ( "%s CO_2eq: %d ppm, TVOC: %d"%( asctime(), co2eq, tvoc ))
             print(res)
             f.write("%i %i %i \n"%(time(),co2eq,tvoc))
-            http_post_data()
             store_baseline(n)
             elapsed = (time() - start)
             sleep(1 - elapsed )
 
-bus.close()
+    bus.close()