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Changes to HCI.py to support TI WL1837 module #91

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21 changes: 16 additions & 5 deletions Firmware/Linux_HCI/HCI.py
Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@ def run_hci_cmd(cmd, hci="hci0", wait=1):
time.sleep(wait)


def start_advertising(key, interval_ms=2000):
def start_advertising(key, no_mac_address_reverse, mac_opcode_group_field, mac_opcode_command_field, no_restart_bluetooth, interval_ms=2000):
addr = bytearray(key[:6])
addr[0] |= 0b11000000

Expand All @@ -51,9 +51,16 @@ def start_advertising(key, interval_ms=2000):
print(f"payload ({len(adv):2}) {adv.hex()}")

# Set BLE address
run_hci_cmd(["0x3f", "0x001"] + bytes_to_strarray(addr, with_prefix=True)[::-1])
subprocess.run(["systemctl", "restart", "bluetooth"])
time.sleep(1)
if no_mac_address_reverse:
mac_address = bytes_to_strarray(addr, with_prefix=True)
else:
mac_address = bytes_to_strarray(addr, with_prefix=True)[::-1]

run_hci_cmd([mac_opcode_group_field, mac_opcode_command_field] + mac_address)

if no_restart_bluetooth == False:
subprocess.run(["systemctl", "restart", "bluetooth"])
time.sleep(1)

# Set BLE advertisement payload
run_hci_cmd(["0x08", "0x0008"] + [format(len(adv), "x")] + bytes_to_strarray(adv))
Expand All @@ -74,10 +81,14 @@ def start_advertising(key, interval_ms=2000):
def main(args):
parser = argparse.ArgumentParser()
parser.add_argument("--key", "-k", help="Advertisement key (base64)")
parser.add_argument("--no_mac_address_reverse", "-nmacr", action='store_true', default=False, help="Do not reverse the mac address bytes")
parser.add_argument("--mac_opcode_group_field", "-mac_ogf", type=str, default="0x3f", help="Vendor-specific OpCode Group Field for setting mac address")
parser.add_argument("--mac_opcode_command_field", "-mac_ocf", type=str, default="0x001", help="Vendor-specific OpCode Command Field for setting mac address")
parser.add_argument("--no_restart_bluetooth", "-nrbt", action='store_true', default=False, help="Do not restart bluetooth")
args = parser.parse_args(args)

key = base64.b64decode(args.key.encode())
start_advertising(key)
start_advertising(key, args.no_mac_address_reverse, args.mac_opcode_group_field, args.mac_opcode_command_field, args.no_restart_bluetooth)


if __name__ == "__main__":
Expand Down
24 changes: 24 additions & 0 deletions Firmware/Linux_HCI/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -17,3 +17,27 @@ Our Python script uses HCI calls to configure Bluetooth advertising. You can cop
```bash
sudo python3 HCI.py --key <ADVERTISMENT_KEY>
```

### Optional Arguments
```bash
sudo python3 HCI.py --key <ADVERTISMENT_KEY> \
[--no_mac_address_reverse | -nmacr] \
[--mac_opcode_group_field <MAC_OPCODE_GROUP_FIELD> | -mac_ogf <MAC_OPCODE_GROUP_FIELD>] \
[--mac_opcode_command_field <MAC_OPCODE_COMMAND_FIELD> | -mac_ocf MAC_OPCODE_COMMAND_FIELD] \
[--no_restart_bluetooth | -nrbt]
```

Where

| Option | Description |
|--------------------------------------------------------|--------------------------------------------------------------|
|`--no_mac_address_reverse` | Do not reverse the mac address bytes |
|`--mac_opcode_group_field <MAC_OPCODE_GROUP_FIELD>` | Vendor-specific OpCode Group Field for setting mac address |
|`--mac_opcode_command_field <MAC_OPCODE_COMMAND_FIELD>` | Vendor-specific OpCode Command Field for setting mac address |
|`--no_restart_bluetooth` | Do not restart bluetooth |

Example usage for Texas Instruments WL1838MOD Wi-Fi, Bluetooth, and Bluetooth Smart Module

```bash
sudo python3 HCI.py --key <ADVERTISMENT_KEY> -nmacr -mac_ocf 0x006
```