Distance, temperature and humidity measurement - ATtiny861A

AlanGHosler · Joined: 25 Jan 2011 Posts: 110

This program uses a Parallax ping, National Semiconductor LM34DZ and Honeywell HIH-4000-003 sensor to measure the distance (head space), temperature and humidity respectively in a septic holding tank. Elsewhere in this forum is programming for using a MaxDetect RHT03 to measure temperature and humidity. I like the Honeywell sensor when only a few points need to be monitored as I believe it provides a more accurate measurement of humidity and it is provided with a calibration sheet.

The attached program shows the use of Timer1 of the ATtiny861A in the 16-bit mode. I don't believe this is addressed in BASCOM 2.0.7.6.

Interestingly to me is that I could not get statements like "Reset PingLed" to work when accompanied by "PingLed Alias PINB.6." The program would compile but the LED would not flash. So I have used "SET PortB.6" which makes it somewhat more difficult to use this programming with other microcontrollers.

Mark provides me very useful comments on my programs - one of which is to make them more portable. I tried.

Contact me if you are interested the PCB or panel design for the project.

albertsm · Joined: 09 Apr 2004 Posts: 6197 Location: Holland

thank you for sharing your project. good to see you finished it.
about Pingled : you made an alias to a PIN register.
That should be a PORT register.
If you write to a PIN register in the tiny861 you toggle the output pin. If that is what you want, you can best use TOGGLE portb.6
Do not forget that the data direction must still be set to output in order to make it work.

Duval JP · Joined: 22 Jun 2004 Posts: 1197 Location: France

Thank you very much for your project, I would like to to something to measure my rain water collector level.
Do you have the part number of your ping detector? 10 years after is it still the same ?

JP
Wink

MWS · Joined: 22 Aug 2009 Posts: 2335

Argh, my comments fell onto an 11 year old post, the TO should know by now the difference between aliasing PIN and PORT. LOL

AlanGHosler · Joined: 25 Jan 2011 Posts: 110

Sorry for the long delay. I have been gone for several months. My sonic detector is a MaxBotix SCXL-MaxSonar WR/WRC MB7589.

It is still operating all these years after being in the head space of a septic tank.

Alan

Duval JP · Joined: 22 Jun 2004 Posts: 1197 Location: France

hi Alan
Many thanks for your answers. I've found distributors in france. I haven't made any progress with my project yet, but it's next on my list.

JP Wink