DB2.1 1.0
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| DB2.1 v1.0 - 2 Button Doorbell | |
|---|---|
| no image yet | |
| Developer | Alexander Christian |
| Status | In Development |
| Microcontroller/Board | M0dularis+ |
| KNX connectivity | MicroBCU |
Description
PCB replacement for 2n Entrycom IP Uni doorbell. It will have 2 buttons with RGB background LED light and a speaker for PCM WAVE playback.
Hardware
M0dularis+ is used as base-controller.
| Description | Pin | Description | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| GND / KNX GND | 1 | 2 | GND from 24V Input | ||||||||
| SJ: 3.3V | VCC | 3 | 4 | 24V from 24V Input | |||||||
| PA22/SDA | SDA / IO0 | 5 | 6 | IO3 | SJ: PA02/A0 | PCM Audio Output via DAC on A0 | |||||
| PA23/SCL | SCL / IO1 | 7 | 8 | ExtINT Application / IO2 | SJ: PA18/D10*# | ReedRelay Speaker Enable | |||||
| PWM R on LED1 | PA09/D3*# | Option0 | 9 | 10 | Option7 | PA17/D13*# | PWM R on LED2 | ||||
| PWM G on LED1 | PA08/D4* | Option1 | 11 | 12 | Option6 | PA16/D11*# | PWM G on LED2 | ||||
| PWM B on LED1 | PA15/D5*# | Option2 | 13 | 14 | Option5 | PA20/D6*# | PWM B on LED2 | ||||
| Button 1 | PA14/D2# | Option3 | 15 | 16 | Option4 | PA21/D7# | Button 2 | ||||
Solder-Jumper (SJ) configuration:
- IO3: SJ to A0
- IO2: SJ to D10
- Application connector: SJ to 3.3V
- Frontend connector: SJ to 3.3V (but is unused)
- I2C (on IO0/IO1): PullUp
* = PWM capable
# = INT capable
24V from yellow/white bus connector -> LM2596 step-down buck converter module -> 5V supply voltage for amplifier + LEDs
Software
The software enabled the user to fully have control over the buttons. One idea ist to have multiple states for the buttons. For instance
- Default (white background light): Rings the bell
- Postman (yellow background light): Ringing the bell will playback a wave file, telling where he can put the package that you are waiting for. Additional things can be triggered by calling a KNX GroupAddress, f.i. open the garage door half a meter so safely store the package.
- ...
Open Questions
- how to get files onto the SPI flash?!
-> see filetransfer via Bus PoC