Electric Bicycle Monitoring and Signaling

# Using NXP IOT with Python
import pexpect
import time
import struct

# PUT YOUR DEVICE ADRESS HERE 
 
DEVICE = "00:60:37:0A:AF:96"
 
#print("NXP IOT address:"),
#print(DEVICE)
 
# Run gatttool interactively.
#print("Run gatttool...")
child = pexpect.spawn("gatttool -I -b 00:60:37:0A:AF:96")
 
# Connect to the device.
#print("Connecting to "),
#print(DEVICE)
child.sendline("connect")
child.expect("Connection successful", timeout=30)
#print("Connection successful"),
child.sendline("characteristics")
child.expect("handle:", timeout=30)
#print("Read temp. characteristics ")
 
# function to transform hex string like "0a cd" into signed integer
def hexStrToInt(hexstr):
 val = int(hexstr[0:2],16) + (int(hexstr[3:5],16)<<8)
 if ((val&0x8000)==0x8000): # treat signed 16bits
     val = -((val^0xffff)+1)
 return val


# Termometer
child.sendline("char-read-hnd 0x0023")
child.expect("Characteristic value/descriptor: ", timeout=10)
child.expect("\r\n", timeout=10)
#print("Temperature (hex): "),
#print(child.before)
#print((child.before)[0:2])
#print((child.before)[3:5])
#print((child.before)[6:8])
#print((child.before)[9:11])
str=((child.before)[0:2])+((child.before)[3:5])+((child.before)[6:8])+((child.before)[9:11])
#print(str)
bin_str = str.encode('utf-8')
temp_float_value=struct.unpack('<f',bin_str.decode('hex'))[0]
temp_float_value = (round(temp_float_value, 1))
print(temp_float_value)
 

# Using NXP IOT with Python
import pexpect
import time
import struct
# PUT YOUR DEVICE ADRESS HERE 
DEVICE = "00:60:37:0A:AF:96"
 
#print("NXP IOT address:"),
#print(DEVICE)
 
# Run gatttool interactively.
#print("Run gatttool...")
child = pexpect.spawn("gatttool -I -b 00:60:37:0A:AF:96")
 
# Connect to the device.
#print("Connecting to "),
#print(DEVICE)
child.sendline("connect")
child.expect("Connection successful", timeout=30)
#print("Connection successful"),
child.sendline("characteristics")
child.expect("handle:", timeout=30)
#print("Read temp. characteristics ")
 
# function to transform hex string like "0a cd" into signed integer
def hexStrToInt(hexstr):
 val = int(hexstr[0:2],16) + (int(hexstr[3:5],16)<<8)
 if ((val&0x8000)==0x8000): # treat signed 16bits
     val = -((val^0xffff)+1)
 return val


# Hygrometer
child.sendline("char-read-hnd 0x0026")
child.expect("Characteristic value/descriptor: ", timeout=10)
child.expect("\r\n", timeout=10)
#print("Temperature (hex): "),
#print(child.before)
#print((child.before)[0:2])
#print((child.before)[3:5])
#print((child.before)[6:8])
#print((child.before)[9:11])
str=((child.before)[0:2])+((child.before)[3:5])+((child.before)[6:8])+((child.before)[9:11])
#print(str)
bin_str = str.encode('utf-8')
hyg_float_value=struct.unpack('<f',bin_str.decode('hex'))[0]
hyg_float_value = (round(hyg_float_value, 1))
print(hyg_float_value)
 

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