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protocol_new_modules.md

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Protocol new module

Gereral

Protocol: RS485
Baudrate: 19200 8N1

Message Structure

<BREAK> FF <COMMAND> <ADDR> ( < VALUE1> ( <VALUE2> ..) )

  • BREAK Every message needs to start with an break
  • FF: Start Byte
  • ADDR: Module address
  • CMD: Command
  • DATA: Data to send. If multiple, sendt to following modules

Commands

Commands are in HEX

Command Write Read Description
DISP/RDB C0 D0 Set/Get Position
STAT C1 D1 Read: Get status
RESET/VER C4 D4 Read: Get firmware version
ZERO C5 Move to zero point
STEP C6 Move motor a step (1 blade) forward
PULSE C7 Move motor a pusle forward
TEST C8
CTRL C9 D9
NULL/POS CA DA
WIN CB DB Used for calibration
CALB CC DC Calibrate
TYPE CD DD Set/get type
ADDR CE DE Set/get address
SNBR CF DF Set/get serial number

DISP Set Position

FF C0 <ADDR> <POS>

pos is position in bytes

Example

Address: 29, Position: 20
FF CO 1D 14

RDB Get position

FF DO <ADDR>

The module answer 1 bit with position as bytes

Example

Address: 29 , Module Position: 30
FF DO 1D
Response:
1E

TYPE Get device Type

FF DD <ADDR>

The module answer 1 bit with type

Types

Int Hex Type #Blades
1 01 Hour/Alphanummeric 40
2 02 Minute 62

Example

Address: 29 , Module Type: Hour
FF DD 1D
Response:
01

SNBR Get serial number

FF DF <ADDR>
The module answers with 4 bytes containing the serial number

Example

Address: 29 , Module Serial number: 43516
FF DF 1D
Response:
01 88 3f 00

ZERO Move motor to null position

FF C6 <ADDR>

Note: on hour modules, zero is "0." and on minute modules "31"

Example

Address: 29 FF C6 1D

STEP Move motor one blade

FF C6 <ADDR>

If not moving correctly, number of PULSE for a step can be changed in calibration.

Example

Address: 29 FF C6 1D

PULSE Move motor one pulse

FF C6 <ADDR>

A few pulses are required to complete a STEP.

Example

Address: 29
FF C7 1D

VER Get firmware version

FF D4 <ADDR>

The module answers with 2 bytes containing the version number

CALB Calibrate the device

FF CC <ADDR>

The calibration sets how many pulses are required for moving to next blade and set blade number. Use with caution.

Procedure

  • Send calibrate command
    • FF CC <ADDR>
  • Send STEP until blade change
    • FF C6 <ADDR>
  • Now send PULSE until next blade falls
    • FF C7 <ADDR>
  • Now send WIN with the blade number to set code to current blade
    • FF CB <ADDR> <POS>

ADDR Change address of module

FF CE <OLD_ADDR> <NEW_ADDR>

Changes address of the module. There is no response

Example

Old Address: 29 New Address: 30 FF CE 1D 1E