diff --git a/sensor_docs/sysprep.md b/sensor_docs/sysprep.md
new file mode 100644
index 0000000..631e85e
--- /dev/null
+++ b/sensor_docs/sysprep.md
@@ -0,0 +1 @@
+# sysprep - How to prepare a Raspberry Pi 3 B+ to run TeraHz
diff --git a/utils/getcdata.py b/utils/getcdata.py
index c6870d9..49741f2 100644
--- a/utils/getcdata.py
+++ b/utils/getcdata.py
@@ -1,7 +1,6 @@
 # getcdata.py - fetch the calibrated data from the AS7265x module
 # this program is 3-clause BSD license
 import serial as ser
-from parse import *
 import pandas as pd
 import numpy as np
 import matplotlib.pyplot as plt
@@ -42,4 +41,4 @@ with ser.Serial(uartpath, uartbaud, timeout=uarttout) as sensor:
         spectrum.set_ylabel('uW/cm2')
         win.canvas.draw()
 
-        time.sleep(1)
+        time.sleep(0.1)
diff --git a/utils/smbus-test.py b/utils/smbus-test.py
new file mode 100644
index 0000000..bb33aa8
--- /dev/null
+++ b/utils/smbus-test.py
@@ -0,0 +1,4 @@
+import smbus
+
+bus = smbus.SMBus(1)
+print(bus.read_word_data(0x10, 0x07))