Write hex value to a characteristic?

Ok I just sniffed the communication between the nrf app and the candle and then the Puck and the candle. The opcode is definitely different and that seems to be the issue (WriteWithResponse not supported by the candle?).

nrf app Write Request:

Bluetooth Attribute Protocol (0x0004)
Opcode: Write Request (0x52)
Handle: 0x0016
Value: 000000ff

Puck Write Request:

Bluetooth Attribute Protocol (0x0004)
Opcode: Write Request (0x12)
Handle: 0x0016
Value: 00ff0000

Puck Error Response:

Bluetooth Attribute Protocol
Opcode: Error Response (0x01)
Request Opcode in Error: Write Request (0x12)
Handle in Error: 0x0016
Error Code: Write Not Permitted (0x03)