Temperature logger

RE: Temperature logger

Caden Dax Rickard — Mon, 23 Sep 2024 03:40:55 GMT

That sounds like an interesting project! I hope you find the right device and solutions for it. If you're ever curious about unique flower names, you might enjoy learning about flowers that start with x. Good luck with your temperature logger!

RE: Temperature logger

Kurt — Thu, 30 Jan 2014 14:52:32 GMT

Here is the url: RFduino

RE: Temperature logger

Kurt — Thu, 30 Jan 2014 14:51:38 GMT

Dear Petter, dear Ole, thank you very much for your hints. I was searching in the same time and ran into the rfduino product which is built on the nRF51822 chip, so it's exactly what I am looking for. The programming language is easy to start and as far as i can see there are also some projects ready to run with ios. Your SoC is exceptional! I didn't find the way to use it so handy until now. As described at arduino forums the development of the temperature logger and the resistance logger couldn't be impossible. I will give some sample code when I am done. Best Regards Kurt

RE: Temperature logger

Ole Morten — Wed, 29 Jan 2014 15:18:47 GMT

Please also refer to this question for the difference between the kits: https://devzone.nordicsemi.com/index.php/what-s-the-difference-between-nrf51822-evaluation-and-development-kits

RE: Temperature logger

Petter Myhre — Wed, 29 Jan 2014 14:24:54 GMT

Hi Kurt

Thank you for the explaination. I haven't heard of this before and I'm not aware of any projects in the same direction. The nRF51822 has a 10 bit ADC which can be useful, but unfortunately I can't recommend any implementation. You could create a separate thread addressing this, maybe someone out there has any suggestions.

We have two developing platforms for the nRF51822, the Evaluation Kit and the Development Kit.

The eval kit is a stand-alone development platform with a few 2 buttons, 2 LEDS, coin-cell battery holder, current measurement pins++

The dev kit is used together with the nRFgo Starter Kit which consists two nRFgo motherboards, a display add-on module, and cables. Each motherboard has an nRFgo radio module socket, an add-on module socket, standard interface connectors (USB, RS232, ISP and hardware debug), plus an array of I/O ports and buttons, an on-board I/O controller, and multiple power supply options (USB, battery, or external supply).

RE: Temperature logger

Kurt — Tue, 28 Jan 2014 19:38:03 GMT

if you measure several times over time you need to store your results -> its a humidity logger (or resistance logger).

RE: Temperature logger

Kurt — Tue, 28 Jan 2014 19:37:06 GMT

Yes of course. I.e. if you like to know if the soil of your flowers is wet enough or it's already getting dry you can measure the resistance of the soil. In case it is high there is a lot of water, if its low, the soil is dry. So to monitor the dryness of the soil and to give an alarm it would be great to measure the resistance. Is it possible to use one pin of the nRF51822 to measure resistance? Are there already some projects in the same direction?

Thank you very much,

curt

RE: Temperature logger

Petter Myhre — Tue, 28 Jan 2014 10:07:09 GMT

Could you please explain to me what you mean by "log resistance"?

RE: Temperature logger

Kurt — Mon, 27 Jan 2014 21:35:44 GMT

Hi Petter, me again. I try to develop a chip which can do the following tasks:

log temperature
log resistance
connect with iPhone app to push the stored data only when certain values are reached (temp low, resistance high i.e.)

Is it possible to program something like that with the nRF51822 and which parts do I have to buy to built a proof of concept? Is the nRF dev Kit enough?

I hope its more clear now what I am looking for. Thank you very much for your help.

curt

RE: Temperature logger

Petter Myhre — Tue, 14 Jan 2014 15:47:59 GMT

The nRF8001 is not a SoC, you need a microcontroller to utilize it, the microcontroller would have memory to store the temperatures.

I'm not sure I get what you mean by ready to use unit. Do you want to develop your own product or use a ready to use unit?

RE: Temperature logger

Kurt — Tue, 14 Jan 2014 13:01:44 GMT

PS: The data transmission doesn't have to be fast, so I don't worry in that way. In fact I expect about 10 to 30 temperature values to be transferred in about one or two minutes, I expect no problems at this point.

RE: Temperature logger

Kurt — Tue, 14 Jan 2014 12:59:46 GMT

Hi Petter, thank you very much for your reply. I asked because I am not sure if it as possible to configure the behavior of the nRF8001. The specifications don't tell about memory, so I don't know exactly if it could log some data over a time to transfer it later on. So if you say I can adapt the functions of nRF8001 to my needs, I would got forward to buy the development kit.

Whereas the 51822 is equipped with everything I need, it is actually not available as a ready to use unit (as i.e. the 8001 you can see here). This would be much more handy to use, but contains only nRF8001.

Thank you again for your advice,

curt

RE: Temperature logger

Petter Myhre — Tue, 14 Jan 2014 10:42:09 GMT

I would recommend you to examine nRF51822 and nRF8001.

Both offer BLE, the nRF8001 might work, but it has some limitations on data rate compared to nRF51822, see this thread.

We have development kits available. The source code for our iOS apps are available here.