41 lines
1.2 KiB
Markdown
41 lines
1.2 KiB
Markdown
# FTDI_simple_alarm
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Use a USB-Serial Converter like the FT232RL for activating a buzzer. Simple and cheap (~1,75€)
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## Features:
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* works on GNU/Linux only
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* no drivers or other software/libs are requidered
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* triggerd via bash or service daemon
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## Limitations:
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* works safe on system with only one /dev/ttyUSB device
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* no other task can use the FTDI device for other things
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## Handware:
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1. FT232RL Breakout board ~1,5€
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2. NPN Transistor like 2N2222A ~0,0€
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3. Active Buzzer 5V ~0,25€
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### Schematics:
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## Software:
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### Commmon Distributions
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Make shure the device is recocntied as ttyUSB after plug in with `dmesg`.<br/>
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Edit the alarm.sh with your device name, like `/dev/ttyUSB0`. <br/>
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Run `bash ./alarm.sh` for starting the alarm.<br/>
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### openWrt
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`opkg update`<br/>
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`opkg install kmod-usb-serial`<br/>
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`opkg install kmod-usb-serial-ftdi`<br/>
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Make shure the device is recocntied as ttyUSB after plug in with `dmesg`.<br/>
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Edit the alarm.sh with your device name, like `/dev/ttyUSB0`. <br/>
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Run `bash ./alarm.sh` for starting the alarm.<br/>
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### Service
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todo |