MPVX7002 air speed sensor

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ronron84
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MPVX7002 air speed sensor

Post by ronron84 » Sat Apr 25, 2020 5:13 pm

HI,

I just order a mpvx7002 an ADS 1115 and a MS5611, to built a air speed sensor, can you tell me if the wiring "drawing" below is OK
thanks for your answers.
Attachments
ARDUINO.png
Last edited by ronron84 on Sun Apr 26, 2020 8:59 am, edited 1 time in total.


mstrens
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Re: MPVX7002 air speed sensor

Post by mstrens » Sat Apr 25, 2020 6:06 pm

Wiring between ADS1115 and MVS7002 is not as expected in the oXs_config_documentation.h file.
Did you found some other documentation? Perhaps the oXs_config_documentation.h has to be updated.
Otherwise, remove the 2X10k, the 100K and the capacitor.

Connect the output of MVS7002 (3rd pin on connector) directly A0
Then about te 2X10K resistor connect them as said by the documentation :
- connect one resistor of about 10kohm between ads1115 Vcc and ads1115 A1 and another one of the same value between ads1115 Ground and ads1115 A1; so A1 pin get Vcc/2 volt

It could be that the 100K and capacitor is needed ( it could be that a member recommend them). If used, then the resistor should be connected between the output of MVS7002 and A0; the capacitor between A0 and Grnd

Furthermore, usually I connect the + of the power supply to the Raw pin of the arduino and I connect the 5V pin of the arduino to the +Vcc of the sensors (MS5611, MVS7002 and Ads1115). So the sensor are powered with a more or less regulated powersupply.

ronron84
Posts: 21
Joined: Sat Apr 18, 2020 7:13 pm
Country: -

Re: MPVX7002 air speed sensor

Post by ronron84 » Sun Apr 26, 2020 8:54 am

Thanks mstrens for your advices, i didn't find the description first, i try to figure out with picture and explenation found on german thread how to connect and make it works :( , so now it's clear ;) i will try the option version if the value i've got are not really accurate. here the picture modified.
Attachments
ARDUINO2.png

ronron84
Posts: 21
Joined: Sat Apr 18, 2020 7:13 pm
Country: -

Re: MPVX7002 air speed sensor

Post by ronron84 » Sat Jun 27, 2020 11:51 pm

I've just finished to build it, i see in the sketch that we can use ppm to change from ms5611 to airspeed compasated and for each choice, we can modify sensitivity (ms5611 case) and compasation between ms5611 and mpx7002 (airspeed compasated case) if i use it, i have to program a switch 3 positions with :1 airspeed comp.,2 ms 5611 and 3 reset mpx7002. This switcht is mixed with a slider who modify the sensitivity or compasation depending of the positive or négative value sent between -10 and - 40 ppm and 60 to 90ppm. As far as i understand the programed sensibility of the ms 5611 will always been taken first when i start the radio, do i have to start the range of my slider at 0 instead of (-)10 ,to keep programed sensibility if i reset the mpx7002
Thanks


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