Now Arduino programmable and Serial controlled
Arduino code to repurpose Ikea Rothult lock for serial control
Accepts single character commands from serial input (9600,n,8,1)
| Character | Command |
|---|---|
| B | Buzzer |
| O | Open |
| C | Close |
| 1 | Small move CW |
| 2 | Small move CCW |
STM32L051K86 UFQFPN32
| Pin | IO | Connection |
|---|---|---|
| PA14 | O | SWCLK (Pin 1 Header) |
| PA13 | IO | SWDIO (Pin 2 Header) |
| PA10 | I | USART1 RX (Pin 5 Header) |
| PA9 | O | USART1 TX (Pin 6 Header) |
| PA15 | O | Buzzer |
| PB4 | I | Switch (extended) |
| PB5 | I | Switch (restracted) |
| PB7 | O | Motor CW |
| PB8 | O | Motor CCW |
| PC14 | O | Battery Load (100 Ohm) |
| PA1 | O | Battery Voltage Divider Reference (set to 0) |
| PA2 | I | Battery Volt/2 |
| PA4 | O | ~SS to RFID |
| PA5 | O | SCLK to RFID |
| PA6 | I | MISO from RFID |
| PA7 | O | MOSI to RFID |
| PB0 | I | IRQ from RFID |
Header
| Pin | Connection |
|---|---|
| 1 | SWCLK |
| 2 | SWDIO |
| 3 | +3V |
| 4 | GND |
| 5 | USART1 RX |
| 6 | USART1 TX |
Based on the work from Brian McEvoy & Allmänt Grinande
(https://blognamn.wordpress.com/2018/11/01/teardown-of-the-ikea-rothult-rfid-lock/)
(https://hackaday.com/2019/05/05/ripping-up-a-rothult/)
(http://www.24hourengineer.com/2019/04/2019-04-09-tu-ikea-rothult-teardown.html)
1) Install Arduino
2) Add STM32duino to Arduino
3) Create L051 variant
L051 variant needs to be added to STM32Arduino package by adding/modifying files at C:\Users...\AppData\Local\Arduino15\packages\STM32\hardware with files from repository.
4) Arduino Configuration
5) Compile INO from repository using Arduino
6) Connect ST-LINK to SWD interface using Rothult Header
7) Program device using ST-Link
