I'm trying to adapt the read-write example to a distance sensor (HC-SR04), sending a T

There are two things wrong with this example: the numbering of

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I'm getting this error : <div class="snippet-clipboard-content notranslate positio

I had to comment HC_SR04(); and <code class="notra

Adapting read-write example to distance sensor about ofxgpio HOT 5 OPEN

kashimastro commented on July 28, 2024

Adapting read-write example to distance sensor

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Comments (5)

kashimAstro commented on July 28, 2024 1

There are two things wrong with this example:

the numbering of triggers and echoes is wrong
there are no pins numbered with 39 and 40
state_button is not set.

try starting with this example (untested):
https://gist.github.com/kashimAstro/41662bd8d78246efb1820a210c7c3e60

there are two variables in the class no_window:
int trigger = 0; <--- number pin trigger
int eco = 0; <--- number pin echo

if you are not sure of the numbering turn me a picture of your scheme
and remember to use resistors on the echo pin.

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kashimAstro commented on July 28, 2024

in this scheme the number of trigger is GPIO18 and echo GPIO23.

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AnasGhrab commented on July 28, 2024

Thank you very much ! I'll try it and keep you informed.

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AnasGhrab commented on July 28, 2024

I'm getting this error :

obj/linuxarmv6l/Release/src/main.o: In function `no_window::~no_window()':
main.cpp:(.text._ZN9no_windowD2Ev[_ZN9no_windowD5Ev]+0x28): undefined reference to `HC_SR04::~HC_SR04()'
obj/linuxarmv6l/Release/src/main.o: In function `no_window::~no_window()':
main.cpp:(.text._ZN9no_windowD0Ev[_ZN9no_windowD5Ev]+0x28): undefined reference to `HC_SR04::~HC_SR04()'
obj/linuxarmv6l/Release/src/main.o: In function `main':
main.cpp:(.text.startup+0x118): undefined reference to `HC_SR04::HC_SR04()'
collect2: error: ld returned 1 exit status
/home/pi/openFrameworks/libs/openFrameworksCompiled/project/makefileCommon/compile.project.mk:403: recipe for target 'bin/test-HC-SR04' failed
make[1]: *** [bin/test-HC-SR04] Error 1
make[1]: Leaving directory '/home/pi/openFrameworks/apps/myApps/test-HC-SR04'
/home/pi/openFrameworks/libs/openFrameworksCompiled/project/makefileCommon/compile.project.mk:124: recipe for target 'Release' failed
make: *** [Release] Error 2

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AnasGhrab commented on July 28, 2024

I had to comment HC_SR04(); and ~HC_SR04(); in the HC_SR04 class. But it is still not working.

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