BLE Error

[misterlisty]

Why would i be getting error on BLUE callack as below...

Unhandled exception in callback handler
Traceback (most recent call last):
File "main.py", line 202, in char1_cb_handler
TypeError: unsupported types for add: 'str', 'bytes'

def char1_cb_handler(chr):
logger("BLEADVERTISE::Read\Write request...")    
global char1_read_counter
global c_ssid
global c_pwd
global devicename
global lastcommand
events = chr.events()
if  events & Bluetooth.CHAR_WRITE_EVENT:
    print("Write request[",char1_read_counter,"] with value = ",chr.value())
    if char1_read_counter==0:
        devicename=chr.value()
    elif char1_read_counter==1:
        c_ssid=chr.value()
    elif char1_read_counter==2:
        c_pwd=chr.value()
    elif char1_read_counter==5:
        lastcommand=chr.value()
        commander(chr.value().decode('utf-8'))
else:
    char1_read_counter += 1
    if char1_read_counter > 5:
        char1_read_counter=0
    if char1_read_counter==0:
        return "devicename[" + devicename + "]"
    elif char1_read_counter==1:
        return "ssid[" + c_ssid + "]"
    elif char1_read_counter==2:
        return "pwd[" + c_pwd + "]"
    elif char1_read_counter==3:
        return "pwd[" + c_pwd + "]"
    elif char1_read_counter==4:
        if wl.isconnected():
            return "IP[" + wl.ifconfig()[0] + "]"  
        else:
            return "not connected"  #LINE 202 ERROR AS ABOVE
    elif char1_read_counter==5:
        return "lastcommand[" + lastcommand	+ "]"

[misterlisty]

Problem..solved due to your suggestion!

[jmarcelino]

@misterlisty

The error is probably in:

"lastcommand[" + lastcommand + "]"

Try:

"lastcommand[" + str(lastcommand) + "]"

instead