So this is interesting!

First of all, thank you!

I have one single ELM327 BT device and have tested it on two cars today. Peugeot 407, your new io file works 100%, whatever i can get atm from the odbII, i have.

But, i have also tested with the same BT interface in Toyota Yaris and guess what... it seem that the handshake is different (no matter the io file), atz, ate0, 0100 is not the init sequence:

~ $ /opt/pyobd/pyobd_start
Searching for BT dev...
-Found device: CHX (00:11:12:19:11:33)
Found BT SPP dev
/dev/rfcomm0
Send: atz

self.state: 1
Send: ate0
ate0
Send: 0100
BUS INIT: ERROR
Send: atz
ELM327 v1.4
self.state: 1
Send: ate0
ate0
Send: 0100
BUS INIT: ERROR
Send: atz
ELM327 v1.4
self.state: 1
Send: ate0
ate0
Send: 0100
BUS INIT: ERROR
Send: atz
ELM327 v1.4
self.state: 1
Send: ate0
ate0
Send: 0100
BUS INIT: ERROR
Send: atz
ELM327 v1.4
self.state: 1
Send: ate0
ate0
Send: 0100
BUS INIT: ERROR
Send: atz
ELM327 v1.4
self.state: 1
Send: ate0
ate0
Send: 0100

what could this be?