Supporting the built-in Vaisala temperature and humidity sensors

[gomes89]

Hello. Is it possible use the original temperature/humidity sensors in the boom? If so, how to configure the code to use them?

Also, same question applies to the barometer module in the SGP model.

[iz2fly]

With this firmware I think it's not possible.
It is possible to detect, for now, only the temperature with the firmware you find on my website, modified by my friend.
https://iz2fly.altervista.org/radiosonde/
The calibration instructions are only in Italian and Spanish but I don't think it's a problem, google translate helps us.
I am using this firmware as CW beacon at 432.428MHz and on the APRS map (IZ2FLY-1), there you can see the temperature at 1150m above sea level with the original sensor in the boom:
https://aprs.fi/#!lat=45.6&lng=10.33083
Unfortunately there are few iGates on this frequency and they are not always in operation.

[gomes89]

Thanks a lot for the reply @iz2fly. Indeed I didn't find any reference in the code. I will have a look at the firmware in your website and do a couple tests. Spanish or Italian are both fine for me without translation.

One thing I will have to check is the status of the boom in the radiosonde I plan to use. The original firmware reports PTU failure, but physically I see no damage at all (with microscope). With the pinout you provide in the calibration instructions I can easily measure the resistance.

Also, do you have any way to read the barometer in the RS41-SGP? With the original firmware I'm getting the correct value right now.

[iz2fly]

Hi gomes89!
Right now I don't have a way to read the barometer with the firmware and humidity of my friend I2NOS. Maybe in the future it could be possible as we did with the temperature sensor.

[mikaelnousiainen]

Thanks for the discussion here. I'm re-opening this to keep the discussion going on in case we arrive at some solution.

RS41ng does not (yet) support reading the temperature or humidity values using the built-in sensor stalk, because it is not known (not reverse-engineered) entirely how to use the sensors. I know there have been some attempts to reverse-engineer use of the sensors. @iz2fly Would you be able to provide the code that you use for reading the temperature?

[iz2fly]

The code can be downloaded from the link on my web site that I put above:
https://iz2fly.altervista.org/radiosonde/

[gomes89]

Thanks for the discussion here. I'm re-opening this to keep the discussion going on in case we arrive at some solution.

RS41ng does not (yet) support reading the temperature or humidity values using the built-in sensor stalk, because it is not known (not reverse-engineered) entirely how to use the sensors. I know there have been some attempts to reverse-engineer use of the sensors. @iz2fly Would you be able to provide the code that you use for reading the temperature?

Sure, just wanted to avoid discussing this here since it is more a feature request than an issue. I'm working myself on the barometer reading, will get back here if I reach any conclusion.

[darksidelemm]

I know that Gene @wb9coy has also written code to read the temperature sensors, and the pressure sensor in the RS41-SGP. Hopefully they will chime in here with some information.

[wb9coy]

Hi Mark I am still packaging up the code for the temperature sensor. We flew a beta version a few weeks ago and I was pleased with the temperature readings that we observed. The RPM411 pressure sensor code is working perfectly. The build that has the pressure sensor working is at https://github.com/wb9coy/RS41cam

[mikaelnousiainen]

@wb9coy Thanks for all the reverse-engineering work! We'll definitely want to incorporate both the pressure sensor code and any upcoming temperature sensor support in RS41ng.

I didn't see any license in RS41cam code: how is your code licensed?

Also, does your (upcoming temp sensor) code support reading humidity?

73,
Mikael OH3BHX

[wb9coy]

This is my original art and NOT copied from ANY other source. It is open to all for non-profit. I really should put a license statement in the code.

This is a youtube about the camera feature https://www.youtube.com/watch?v=HijQeXucqZ0

[mikaelnousiainen]

@wb9coy Yes, this is exactly what I mean: please indicate a suitable license in your repository, preferably something that is compatible with GPL-2.0 which is the license RS41ng uses :)

[wb9coy]

I added the LICENSE file to the archive.

[ECVGG]

Hi Mark I am still packaging up the code for the temperature sensor. We flew a beta version a few weeks ago and I was pleased with the temperature readings that we observed. The RPM411 pressure sensor code is working perfectly. The build that has the pressure sensor working is at https://github.com/wb9coy/RS41cam

Could you make some steps for programming it? I'm a bit lost