I contacts test system
Budget: $25 – $50 CAD
write source or help trouble shoot using debugging tools our existing code.
C (Arduino IDE) but prefer to use Atmel Studio
Using ATmega328 or ATMega168P QFP CPU
Monitor 5 I/O pins - to determine if a switch contact is open or closed
Closed is Good, open is alarm condition
Also use A/D to drive an LM84T temperature sensor and measure once per minute
Alarm condition if temperature is over 75C
once per 5 minutes - use serial lines to operate and send a message using HopeRF RFM95 LORA radio module. (this is a 'status ok' message)
We have library for this radio module
When alarm conditions occur (contact open or temperature >75C) alarm message sent.
Message payload is 6bits - we have this defined.
Device sends messages only
1650mAH battery - target 5 years life
We have this all working but there is a bug causing CPU hand and battery drain.
considering fresh start as back up while we continue to troubleshoot the code we have.
Power source 3V non rechargeable lithium battery or Thionyl Chloride
C (Arduino IDE) but prefer to use Atmel Studio
Using ATmega328 or ATMega168P QFP CPU
Monitor 5 I/O pins - to determine if a switch contact is open or closed
Closed is Good, open is alarm condition
Also use A/D to drive an LM84T temperature sensor and measure once per minute
Alarm condition if temperature is over 75C
once per 5 minutes - use serial lines to operate and send a message using HopeRF RFM95 LORA radio module. (this is a 'status ok' message)
We have library for this radio module
When alarm conditions occur (contact open or temperature >75C) alarm message sent.
Message payload is 6bits - we have this defined.
Device sends messages only
1650mAH battery - target 5 years life
We have this all working but there is a bug causing CPU hand and battery drain.
considering fresh start as back up while we continue to troubleshoot the code we have.
Power source 3V non rechargeable lithium battery or Thionyl Chloride