Modifications

== Le code ==

== Le code ==

{{bloc-etroit|text=The code for a simple alarm with three sensors or branches is shown below.

{{bloc-etroit|text=Le code pour le simple système d'alarme est présenté ci-dessous.

This configuration has the sensors tied into resistors feeding Pin 3. The Trinket must be programmed out of the circuit as pins 3 and 4 are shared with the USB.

Cette configuration utilise des senseurs liées à la broche 3 (analogique) par l'intermédiaire de résistances. Le Trinket doit être programmé débranché du montage puisque les broches 3 et 4 sont utilisée par le connecteur USB.

The program uses the standard Softwareserial library to talk via the Bluefruit EZ-Link on Pin 0 for transmit, Pin 2 for receive. You can eliminate the requirement to specify a receive pin (and shrink the code slightly) with the third party SendOnlySoftwareSerial library on arduino.cc via this forum thread: [http://forum.arduino.cc/index.php?topic=112013.0 http://forum.arduino.cc/index.php?topic=112013.0.].  This would also allow you to use Pin 2 (Analog 1) for alarms, freeing Pin 3 shared with USB.

The program uses the standard Softwareserial library to talk via the Bluefruit EZ-Link on Pin 0 for transmit, Pin 2 for receive. You can eliminate the requirement to specify a receive pin (and shrink the code slightly) with the third party SendOnlySoftwareSerial library on arduino.cc via this forum thread: [http://forum.arduino.cc/index.php?topic=112013.0 http://forum.arduino.cc/index.php?topic=112013.0.].  This would also allow you to use Pin 2 (Analog 1) for alarms, freeing Pin 3 shared with USB.

Trip each combination of sensors, record the value for the analog pin displayed on the serial line. Change the code line that has uint16_t values to the values you find. On the bench this process takes less than 5 minutes. If you have problems with the final install giving errors, try this process again as the resistance of the wiring may change the values. }}

Trip each combination of sensors, record the value for the analog pin displayed on the serial line. Change the code line that has uint16_t values to the values you find. On the bench this process takes less than 5 minutes. If you have problems with the final install giving errors, try this process again as the resistance of the wiring may change the values. }}

  <nowiki>/* Trinket Alarm Analog An alarm system based on the Adafruit Trinket mini microcontroller

  <nowiki>/* Trinket Alarm Analog An alarm system based on the Adafruit Trinket mini microcontroller