calibration altimeter information

masselon

Hello for all

when I run the 29124 Altimeter Module Driver object it show my current altitude with a value of 2086 meters instead of 1020 meters.
I would like some help to calibraite this iinformation

Thanks in advance.
Masselon

JonnyMac

You should consul the data sheet for the chip that is used: MS5607

masselon

I am thinking there are some bug in this object.
Surpraselly I found it display some data without the altimeter module connect in the propeller chip.
It displaly this data all time it run with none module connected (MS5607 DEMO 3.SPIN):
Start Alt:-684409
Current Alt:-6844.09 ft : -684409
Actual Alt:0
Temp:6801F

masselon

@JonnyMac said:
You should consul the data sheet for the chip that is used: MS5607

I am thinking there are some bug in this object.
Surpraselly I found it display some data without the altimeter module be connect in the propeller chip.
It displaly this data all time it run with none module connected (MS5607 DEMO 3.SPIN):
Start Alt:-684409
Current Alt:-6844.09 ft : -684409
Actual Alt:0
Temp:6801F

Tracy Allen

Do you actually have the Parallax module 29124? If not, perhaps you have an MS5611 chip instead of an MS5607? The conversion formulae are different. There is a setting in the firmware to specify either MS5607 or MS5611. I have used Phil's code extensively, and I can assure you there is not a bug in the code base.

The result with no altimeter module connected is meaningless.

masselon

@"Tracy Allen" said:
Do you actually have the Parallax module 29124? If not, perhaps you have an MS5611 chip instead of an MS5607? The conversion formulae are different. There is a setting in the firmware to specify either MS5607 or MS5611. I have used Phil's code extensively, and I can assure you there is not a bug in the code base.

The result with no altimeter module connected is meaningless.

@"Tracy Allen"

How do I do to update the reading data in the PST?

I have the 29124 MS5607 module REV A.

The line code 1236 (29124 Altimeter) put this way:

PRI _cur_temp_press_5607 | d1, d2, dt, offh, offl, sensh, sensl, ph, pl

d1 := _read_adc(RSLT_D1)
d2 := _read_adc(RSLT_D2)

So the result to be displayed need to be read from the sensor, doesn´t it?

The line code 1195 (29124 Altimeter) put this way:

PRI _sample | i, addr, new_val, cur_val, new_median, nsame, j, median

if (dev5611)
_cur_temp_press_5611
else
_cur_temp_press_5607

I supose would be another elseif in the case of none module conected, do you agree?
E.g, Error! any module found,

This is exactly what a means for "some bug in this object".
Really it is not a bug but a missing information like: "module not found", e.g.