How can i use five AM2320?

[enricosx]

hello i'm a noob
i have raspberry pi b 2
please help me to understand how can i use with python five AM2320 sensor
http://www.aliexpress.com/item/5pcs-AM2 ... 97408.html
thanks

[RDS]

I assume you have got it working with 1 sensor to start with.

[enricosx]

ok, but i dont know use one sensor.
w1-gpio? adafruit library? or...?

[mikronauts]

1) it is usually a good idea to research what sensor to buy, and to buy well supported ones before ordering

2) a simple google for "AM2320" leads to the data sheet and much more

http://akizukidenshi.com/download/ds/aosong/AM2320.pdf

3) a quick peek at the data sheet shows it is an I2C device, without any external pins to set the address

Therefore:

- you should need an I2C multiplexer to use more than one on an I2C bus

- the same google search had links to Arduino code you could try adapting to the Pi using the WiringPi library

And googling for "Raspberry Pi AM2320" had links to some postings that may be of help to you.

hello i'm a noob
i have raspberry pi b 2
please help me to understand how can i use with python five AM2320 sensor
http://www.aliexpress.com/item/5pcs-AM2 ... 97408.html
thanks

[joan]

It's probably simplest to use it in so called 1 wire mode (not to be confused with Dallas 1-wire). It then acts like a DHT22. So you would need a 4k7 resistor per device and one spare GPIO per device.

Of course I would read it using my software, probably http://abyz.co.uk/rpi/pigpio/examples.html#pdif2_DHTXXD

[mikronauts]

good point. I guess I have I2C on the brain

What joan said - I can heartily recommend her excellent library.

It's probably simplest to use it in so called 1 wire mode (not to be confused with Dallas 1-wire). It then acts like a DHT22. So you would need a 4k7 resistor per device and one spare GPIO per device.

Of course I would read it using my software, probably http://abyz.co.uk/rpi/pigpio/examples.html#pdif2_DHTXXD

[enricosx]

thanks

[Massi]

I can heartily recommend her excellent library.

[ot]

can't be
[/ot]

[enricosx]

Code: Select all

 gcc -Wall -pthread -o DHTXXD test_DHTXXD.c DHTXXD.c -lpigpiod_if2
test_DHTXXD.c:31:25: fatal error: pigpiod_if2.h: No such file or directory
 #include <pigpiod_if2.h>
                         ^
compilation terminated.
DHTXXD.c:10:25: fatal error: pigpiod_if2.h: No such file or directory
 #include <pigpiod_if2.h>
                         ^
compilation terminated.

[BMS Doug]

I can heartily recommend her excellent library.

[ot]

can't be
[/ot]

Why not?

I don't know what Joan's gender is but the name is very commonly a female name here in the UK, although it is also a common Male name in other countries. (my default assumption was female on that basis).

Joan's gender is irrelevent to my opinion of Joan's superb PIGPIO library and excellent posts.

[BMS Doug]

Code: Select all

 gcc -Wall -pthread -o DHTXXD test_DHTXXD.c DHTXXD.c -lpigpiod_if2
test_DHTXXD.c:31:25: fatal error: pigpiod_if2.h: No such file or directory
 #include <pigpiod_if2.h>
                         ^
compilation terminated.
DHTXXD.c:10:25: fatal error: pigpiod_if2.h: No such file or directory
 #include <pigpiod_if2.h>
                         ^
compilation terminated.

Did you follow the download instructions?

I can see it on Github

re-download it from github?

Code: Select all

git clone https://github.com/joan2937/pigpio

but I would have thought that it is in the zip file

Code: Select all

wget abyz.co.uk/rpi/pigpio/pigpio.zip

You did have the file in your working directory?

[Massi]

Why not?

I don't know what Joan's gender is but the name is very commonly a female name here in the UK, although it is also a common Male name in other countries. (my default assumption was female on that basis).

Joan's gender is irrelevent to my opinion of Joan's superb PIGPIO library and excellent posts.

i totally quote you, but i had a different default assumption and never thought to different possibilities
totally irrelevant, i agree, but it's strange lol

[enricosx]

i don't see download istructions

[DirkS]

i don't see download istructions

Follow one of the links that Doug gave you in viewtopic.php?f=91&t=132994#p886689