src: message: Fix: Checksum split payload_lenght and msg_id into two …

[RaulTrombin]

Fix CRC calculus,
payload_lenght and msg_id should be splited into 2 different bytes for the sum.

Fixed issues for PIng1D msgs.

[patrickelectric]

Suggested change

	let (msb, lsb) = ((self.payload_length >> 8) as u8, self.payload_length as u8);
	checksum += msb as u16 + lsb as u16;
	let (msb, lsb) = ((self.message_id >> 8) as u8, self.message_id as u8);
	checksum += msb as u16 + lsb as u16;
	self.payload_length.to_le_bytes().for_each(|byte| checksum += byte);
	self.message_id.to_le_bytes().for_each(|byte| checksum += byte);

note, needs to check if the correct would be to_le or to_be, it's just a pesdocode

[RaulTrombin]

what about:

        for &byte in self.payload_length.to_le_bytes().iter() {
            checksum += byte as u16;
        }
        for &byte in self.message_id.to_le_bytes().iter() {
            checksum += byte as u16;
        }

[RaulTrombin]

Seems fine.

ProtocolMessage { payload_length: 1, message_id: 1201, src_device_id: 1, dst_device_id: 0, payload: [1], checksum: 332 }
DeviceIdStruct { device_id: 1 }