将dash应用程序部署到heroku时出错，Nidaqmx.lib.DataNotFoundError
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【中文标题】将dash应用程序部署到heroku时出错，Nidaqmx.lib.DataNotFoundError【英文标题】：Error when deployin a dash app to heroku, Nidaqmx.lib.DaqNotFoundError 【发布时间】：2021-09-03 15:32:57 【问题描述】：我正在尝试使用 NI9234 从加速度计远程读取数据。我在 Windows 中工作，我在 python 上使用 plotly dash 和 nidaqmx。整个事情在本地主机上运行良好（能够获取数据并绘制它），但是，当我尝试在 Heroku 上部署它时，我的加速度计根本没有读取任何内容。我认为部署正在运行，但我将其作为我的日志 --tail:
2021-06-19T01:12:23.045293+00:00 heroku[router]: at=info method=GET path="/_dash-component-suites/dash_core_components/async-plotlyjs.v1_16_0m1617903285.js" host=monitoreo-remoto.herokuapp.com request_id=cc5a2471-0689-4b93-91cb-a0d0eb796e82 fwd="187.190.230.255" dyno=web.1 connect=0ms service=325ms status=200 bytes=1034463 protocol=https
2021-06-19T01:12:28.412217+00:00 app[web.1]: Exception on /_dash-update-component [POST]
2021-06-19T01:12:28.412225+00:00 app[web.1]: Traceback (most recent call last):
2021-06-19T01:12:28.412226+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 2070, in wsgi_app
2021-06-19T01:12:28.412227+00:00 app[web.1]: response = self.full_dispatch_request()
2021-06-19T01:12:28.412227+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 1515, in full_dispatch_request
2021-06-19T01:12:28.412228+00:00 app[web.1]: rv = self.handle_user_exception(e)
2021-06-19T01:12:28.412228+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 1513, in full_dispatch_request
2021-06-19T01:12:28.412228+00:00 app[web.1]: rv = self.dispatch_request()
2021-06-19T01:12:28.412229+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 1499, in dispatch_request
2021-06-19T01:12:28.412229+00:00 app[web.1]: return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
2021-06-19T01:12:28.412230+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/dash/dash.py", line 1079, in dispatch
2021-06-19T01:12:28.412230+00:00 app[web.1]: response.set_data(func(*args, outputs_list=outputs_list))
2021-06-19T01:12:28.412231+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/dash/dash.py", line 1010, in add_context
2021-06-19T01:12:28.412232+00:00 app[web.1]: output_value = func(*args, **kwargs) # %% callback invoked %%
2021-06-19T01:12:28.412232+00:00 app[web.1]: File "/app/Vib-easy-3.py", line 110, in update_output
2021-06-19T01:12:28.412233+00:00 app[web.1]: with nidaqmx.Task() as task:
2021-06-19T01:12:28.412233+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/task.py", line 84, in __init__
2021-06-19T01:12:28.412233+00:00 app[web.1]: self._handle = lib_importer.task_handle(0)
2021-06-19T01:12:28.412234+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 178, in task_handle
2021-06-19T01:12:28.412234+00:00 app[web.1]: self._parse_typedefs()
2021-06-19T01:12:28.412235+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 241, in _parse_typedefs
2021-06-19T01:12:28.412235+00:00 app[web.1]: version = system.driver_version
2021-06-19T01:12:28.412236+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/system/system.py", line 73, in driver_version
2021-06-19T01:12:28.412236+00:00 app[web.1]: return DriverVersion(self._major_version, self._minor_version,
2021-06-19T01:12:28.412236+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/system/system.py", line 108, in _major_version
2021-06-19T01:12:28.412237+00:00 app[web.1]: cfunc = lib_importer.windll.DAQmxGetSysNIDAQMajorVersion
2021-06-19T01:12:28.412237+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 166, in windll
2021-06-19T01:12:28.412238+00:00 app[web.1]: self._import_lib()
2021-06-19T01:12:28.412244+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 218, in _import_lib
2021-06-19T01:12:28.412244+00:00 app[web.1]: raise DaqNotFoundError(
2021-06-19T01:12:28.412252+00:00 app[web.1]: nidaqmx._lib.DaqNotFoundError: Could not find an installation of NI-DAQmx. Please ensure that NI-DAQmx is installed on this machine or contact National Instruments for support.
2021-06-19T01:12:28.418592+00:00 app[web.1]: 10.16.188.22 - - [19/Jun/2021:01:12:28 +0000] "POST /_dash-update-component HTTP/1.1" 500 290 "https://monitoreo-remoto.herokuapp.com/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (Khtml, like Gecko) Chrome/91.0.4472.106 Safari/537.36"
2021-06-19T01:12:28.418956+00:00 heroku[router]: at=info method=POST path="/_dash-update-component" host=monitoreo-remoto.herokuapp.com request_id=fde7d56c-acbe-45f9-a1a6-54293cb22e55 fwd="187.190.230.255" dyno=web.1 connect=0ms service=181ms status=500 bytes=463 protocol=https
2021-06-19T01:12:44.515889+00:00 app[web.1]: Exception on /_dash-update-component [POST]
2021-06-19T01:12:44.515899+00:00 app[web.1]: Traceback (most recent call last):
2021-06-19T01:12:44.515900+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 2070, in wsgi_app
2021-06-19T01:12:44.515901+00:00 app[web.1]: response = self.full_dispatch_request()
2021-06-19T01:12:44.515901+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 1515, in full_dispatch_request
2021-06-19T01:12:44.515902+00:00 app[web.1]: rv = self.handle_user_exception(e)
2021-06-19T01:12:44.515902+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 1513, in full_dispatch_request
2021-06-19T01:12:44.515903+00:00 app[web.1]: rv = self.dispatch_request()
2021-06-19T01:12:44.515903+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 1499, in dispatch_request
2021-06-19T01:12:44.515904+00:00 app[web.1]: return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
2021-06-19T01:12:44.515904+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/dash/dash.py", line 1079, in dispatch
2021-06-19T01:12:44.515905+00:00 app[web.1]: response.set_data(func(*args, outputs_list=outputs_list))
2021-06-19T01:12:44.515905+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/dash/dash.py", line 1010, in add_context
2021-06-19T01:12:44.515906+00:00 app[web.1]: output_value = func(*args, **kwargs) # %% callback invoked %%
2021-06-19T01:12:44.515906+00:00 app[web.1]: File "/app/Vib-easy-3.py", line 110, in update_output
2021-06-19T01:12:44.515906+00:00 app[web.1]: with nidaqmx.Task() as task:
2021-06-19T01:12:44.515907+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/task.py", line 84, in __init__
2021-06-19T01:12:44.515907+00:00 app[web.1]: self._handle = lib_importer.task_handle(0)
2021-06-19T01:12:44.515916+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 178, in task_handle
2021-06-19T01:12:44.515917+00:00 app[web.1]: self._parse_typedefs()
2021-06-19T01:12:44.515917+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 241, in _parse_typedefs
2021-06-19T01:12:44.515918+00:00 app[web.1]: version = system.driver_version
2021-06-19T01:12:44.515918+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/system/system.py", line 73, in driver_version
2021-06-19T01:12:44.515919+00:00 app[web.1]: return DriverVersion(self._major_version, self._minor_version,
2021-06-19T01:12:44.515919+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/system/system.py", line 108, in _major_version
2021-06-19T01:12:44.515919+00:00 app[web.1]: cfunc = lib_importer.windll.DAQmxGetSysNIDAQMajorVersion
2021-06-19T01:12:44.515920+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 166, in windll
2021-06-19T01:12:44.515920+00:00 app[web.1]: self._import_lib()
2021-06-19T01:12:44.515920+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 218, in _import_lib
2021-06-19T01:12:44.515920+00:00 app[web.1]: raise DaqNotFoundError(
2021-06-19T01:12:44.515921+00:00 app[web.1]: nidaqmx._lib.DaqNotFoundError: Could not find an installation of NI-DAQmx. Please ensure that NI-DAQmx is installed on this machine or contact National Instruments for support.
2021-06-19T01:12:44.530403+00:00 app[web.1]: 10.16.188.22 - - [19/Jun/2021:01:12:44 +0000] "POST /_dash-update-component HTTP/1.1" 500 290 "https://monitoreo-remoto.herokuapp.com/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.106 Safari/537.36"
2021-06-19T01:12:44.531107+00:00 heroku[router]: at=info method=POST path="/_dash-update-component" host=monitoreo-remoto.herokuapp.com request_id=4cd69bda-50c6-4bd5-8a33-3cd423c725d1 fwd="187.190.230.255" dyno=web.1 connect=1ms service=179ms status=500 bytes=463 protocol=https
2021-06-19T01:12:48.609521+00:00 app[web.1]: Exception on /_dash-update-component [POST]
2021-06-19T01:12:48.609530+00:00 app[web.1]: Traceback (most recent call last):
2021-06-19T01:12:48.609531+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 2070, in wsgi_app
2021-06-19T01:12:48.609531+00:00 app[web.1]: response = self.full_dispatch_request()
2021-06-19T01:12:48.609532+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 1515, in full_dispatch_request
2021-06-19T01:12:48.609532+00:00 app[web.1]: rv = self.handle_user_exception(e)
2021-06-19T01:12:48.609533+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 1513, in full_dispatch_request
2021-06-19T01:12:48.609533+00:00 app[web.1]: rv = self.dispatch_request()
2021-06-19T01:12:48.609534+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 1499, in dispatch_request
2021-06-19T01:12:48.609534+00:00 app[web.1]: return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
2021-06-19T01:12:48.609534+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/dash/dash.py", line 1079, in dispatch
2021-06-19T01:12:48.609535+00:00 app[web.1]: response.set_data(func(*args, outputs_list=outputs_list))
2021-06-19T01:12:48.609535+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/dash/dash.py", line 1010, in add_context
2021-06-19T01:12:48.609536+00:00 app[web.1]: output_value = func(*args, **kwargs) # %% callback invoked %%
2021-06-19T01:12:48.609536+00:00 app[web.1]: File "/app/Vib-easy-3.py", line 110, in update_output
2021-06-19T01:12:48.609537+00:00 app[web.1]: with nidaqmx.Task() as task:
2021-06-19T01:12:48.609537+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/task.py", line 84, in __init__
2021-06-19T01:12:48.609537+00:00 app[web.1]: self._handle = lib_importer.task_handle(0)
2021-06-19T01:12:48.609538+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 178, in task_handle
2021-06-19T01:12:48.609538+00:00 app[web.1]: self._parse_typedefs()
2021-06-19T01:12:48.609539+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 241, in _parse_typedefs
2021-06-19T01:12:48.609539+00:00 app[web.1]: version = system.driver_version
2021-06-19T01:12:48.609540+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/system/system.py", line 73, in driver_version
2021-06-19T01:12:48.609540+00:00 app[web.1]: return DriverVersion(self._major_version, self._minor_version,
2021-06-19T01:12:48.609540+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/system/system.py", line 108, in _major_version
2021-06-19T01:12:48.609541+00:00 app[web.1]: cfunc = lib_importer.windll.DAQmxGetSysNIDAQMajorVersion
2021-06-19T01:12:48.609541+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 166, in windll
2021-06-19T01:12:48.609542+00:00 app[web.1]: self._import_lib()
2021-06-19T01:12:48.609542+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 218, in _import_lib
2021-06-19T01:12:48.609542+00:00 app[web.1]: raise DaqNotFoundError(
2021-06-19T01:12:48.609543+00:00 app[web.1]: nidaqmx._lib.DaqNotFoundError: Could not find an installation of NI-DAQmx. Please ensure that NI-DAQmx is installed on this machine or contact National Instruments for support.
2021-06-19T01:12:48.612660+00:00 app[web.1]: 10.16.188.22 - - [19/Jun/2021:01:12:48 +0000] "POST /_dash-update-component HTTP/1.1" 500 290 "https://monitoreo-remoto.herokuapp.com/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.106 Safari/537.36"
2021-06-19T01:12:48.613854+00:00 heroku[router]: at=info method=POST path="/_dash-update-component" host=monitoreo-remoto.herokuapp.com request_id=5a31bc51-2eef-4370-91bf-e91b144e2b37 fwd="187.190.230.255" dyno=web.1 connect=0ms service=185ms status=500 bytes=463 protocol=https
2021-06-19T01:15:31.312757+00:00 app[web.1]: Exception on /_dash-update-component [POST]
2021-06-19T01:15:31.312766+00:00 app[web.1]: Traceback (most recent call last):
2021-06-19T01:15:31.312770+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 2070, in wsgi_app
2021-06-19T01:15:31.312770+00:00 app[web.1]: response = self.full_dispatch_request()
2021-06-19T01:15:31.312771+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 1515, in full_dispatch_request
2021-06-19T01:15:31.312771+00:00 app[web.1]: rv = self.handle_user_exception(e)
2021-06-19T01:15:31.312771+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 1513, in full_dispatch_request
2021-06-19T01:15:31.312772+00:00 app[web.1]: rv = self.dispatch_request()
2021-06-19T01:15:31.312772+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 1499, in dispatch_request
2021-06-19T01:15:31.312773+00:00 app[web.1]: return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
2021-06-19T01:15:31.312773+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/dash/dash.py", line 1079, in dispatch
2021-06-19T01:15:31.312774+00:00 app[web.1]: response.set_data(func(*args, outputs_list=outputs_list))
2021-06-19T01:15:31.312774+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/dash/dash.py", line 1010, in add_context
2021-06-19T01:15:31.312775+00:00 app[web.1]: output_value = func(*args, **kwargs) # %% callback invoked %%
2021-06-19T01:15:31.312775+00:00 app[web.1]: File "/app/Vib-easy-3.py", line 110, in update_output
2021-06-19T01:15:31.312776+00:00 app[web.1]: with nidaqmx.Task() as task:
2021-06-19T01:15:31.312776+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/task.py", line 84, in __init__
2021-06-19T01:15:31.312777+00:00 app[web.1]: self._handle = lib_importer.task_handle(0)
2021-06-19T01:15:31.312777+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 178, in task_handle
2021-06-19T01:15:31.312778+00:00 app[web.1]: self._parse_typedefs()
2021-06-19T01:15:31.312778+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 241, in _parse_typedefs
2021-06-19T01:15:31.312779+00:00 app[web.1]: version = system.driver_version
2021-06-19T01:15:31.312779+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/system/system.py", line 73, in driver_version
2021-06-19T01:15:31.312780+00:00 app[web.1]: return DriverVersion(self._major_version, self._minor_version,
2021-06-19T01:15:31.312780+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/system/system.py", line 108, in _major_version
2021-06-19T01:15:31.312780+00:00 app[web.1]: cfunc = lib_importer.windll.DAQmxGetSysNIDAQMajorVersion
2021-06-19T01:15:31.312781+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 166, in windll
2021-06-19T01:15:31.312781+00:00 app[web.1]: self._import_lib()
2021-06-19T01:15:31.312781+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/nidaqmx/_lib.py", line 218, in _import_lib
2021-06-19T01:15:31.312782+00:00 app[web.1]: raise DaqNotFoundError(
2021-06-19T01:15:31.312783+00:00 app[web.1]: nidaqmx._lib.DaqNotFoundError: Could not find an installation of NI-DAQmx. Please ensure that NI-DAQmx is installed on this machine or contact National Instruments for support.
2021-06-19T01:15:31.317641+00:00 app[web.1]: 10.5.190.247 - - [19/Jun/2021:01:15:31 +0000] "POST /_dash-update-component HTTP/1.1" 500 290 "https://monitoreo-remoto.herokuapp.com/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.106 Safari/537.36"
2021-06-19T01:15:31.315041+00:00 heroku[router]: at=info method=POST path="/_dash-update-component" host=monitoreo-remoto.herokuapp.com request_id=b613139d-c395-4571-923c-1f6c466a1b2d fwd="187.190.230.255" dyno=web.1 connect=1ms service=131ms status=500 bytes=463 protocol=https
我不知道哪个部分很重要，但是下面一行引起了我的注意：
nidaqmx._lib.DaqNotFoundError: Could not find an installation of NI-DAQmx. Please ensure that NI-DAQmx is installed on this machine or contact National Instruments for support.
我正在使用免费的 Heroku 版本，但我不知道这里是否有人遇到过这个问题。
【问题讨论】：
【参考方案1】：在很多天没有答案后，我将发布我认为正在发生的事情，并发布一个不涉及 heroku 的可行解决方案。
我的理论： python 中的 nidaqmx 库需要来自 National Instruments 的download。如果你没有它，那么它就行不通。该安装仅适用于 Windows。我猜 Heroku 的服务器没有这些文件。
在Heroku之后，我尝试在pythonanywhere运行我的程序，甚至使用了Docker；这些方法都不起作用（也许我做错了什么，或者可能是上面的相同问题）
经过多天的阅读、搜索和尝试不同的方法，我找到了一个不错且简单的解决方案； ngrok。
基本上你只需要register，下载压缩包，解压缩并将ngrok.exe粘贴到C:/Windows/system32。将路径添加到您的env variables（检查来自 il0v3d0g 的答案），然后在本地服务器（例如端口 3040）中运行您的 dash 应用程序，最后在另一个 Windows bash cmd 中运行 ngrok 命令
ngrok http 3040
这将在您的本地主机（即运行您的 dash 应用程序）和互联网上任何其他计算机之间创建一个“隧道”，并使用 ngrok 创建的转发地址。
这是我的“设置”的粗略示意图
如果有人想知道仪表板应用程序是什么样的，我也会添加它（以防像我这样的工程师陷入远程数据获取的可怕任务）
#Working program, on dash program folder.
#Working with bootstrap instead of daq.
# Se debe instalar bootstrap: pip install bootstrap-core-components
import dash
import dash_bootstrap_components as dbc
import dash_core_components as dcc
import dash_html_components as html
from dash.dependencies import Input, Output
import plotly.graph_objects as go
from dash.exceptions import PreventUpdate
import nidaqmx
from nidaqmx.constants import AcquisitionType
import numpy as np
app = dash.Dash(__name__)
#Initial conditions to have something in the graph
trace_1 = go.Scatter(
x = [],
y = []
)
layout = go.Layout(title = 'Título de gráfica')
fig = go.Figure(data = [trace_1], layout = layout)
app.layout = dbc.Container(
[
# Toma todo el espacio de arriba para el título.
dbc.Row(
dbc.Col(html.H3('Monitoreo Remoto V-0.3', className = 'text-center text-primary mb-4'), width = 12)
),
# Esto es otra fila que va a tener dos dropdowns y el botón en la misma columna
dbc.Row(
[
dbc.Col(
[
dbc.Button(
'Capturar',
color = 'primary',
id = 'Swtc_1',
n_clicks = 0
),
dcc.Dropdown(
id = 'f_muestreo',
value = '2048',
multi = False,
disabled = False,
persistence = 'string',
persistence_type = 'session',
options = [
'label' : '2048', 'value':'2048',
'label' : '2560', 'value':'2560',
'label' : '3200', 'value':'3200',
'label' : '5120', 'value':'5120',
'label' : '6400', 'value':'6400',
'label' : '10240', 'value':'10240',
'label' : '12800', 'value':'12800',
'label' : '25600', 'value':'25600'
],
),
dcc.Dropdown(
id = 'muestras',
value = '2048',
multi = False,
disabled = False,
persistence = 'string',
persistence_type = 'session',
options = [
'label' : '2048', 'value':'2048',
'label' : '4096', 'value':'4096',
'label' : '8192', 'value':'8192',
'label' : '16384', 'value':'16384',
'label' : '32768', 'value':'32768',
'label' : '65536', 'value':'65536',
'label' : '131072', 'value':'131072'
],
),
], width = 2
),
# Dentro de la misma fila, se va a meter una nueva columna; para la gráfica.
dbc.Col(
dcc.Graph(id = 'plot_id', figure = fig), width = 9
)
],
)
]
)
# interaction
@app.callback(
Output('plot_id', 'figure'),
[Input('Swtc_1', 'n_clicks'),
Input('f_muestreo', 'value'),
Input('muestras', 'value')]
)
def update_output(n_clicks, value_1, value_2):
changed_id = [p['prop_id'] for p in dash.callback_context.triggered][0]
if 'n_clicks' in changed_id:
sample_rate = int(value_1)
samples_to_acq = int(value_2)
wait_time = samples_to_acq/sample_rate
# Name and channel of my NI 9234
channel_name = 'cDAQBAYO1Mod1/ai0'
# Not using the trig yet
# trig_name = 'cDAQBAYO1Mod1/ai1'
cont_mode = AcquisitionType.CONTINUOUS
units_g = nidaqmx.constants.AccelUnits.G
with nidaqmx.Task() as task:
# Create accelerometer channel and configure sample clock and trigger specs
task.ai_channels.add_ai_accel_chan(channel_name, units = units_g)
task.timing.cfg_samp_clk_timing(sample_rate, sample_mode = cont_mode, samps_per_chan=samples_to_acq)
# Esto es para el tacómetro, de momento está omitido
# task.triggers.start_trigger.cfg_dig_edge_start_trig(trigger_source = trig_name)
# Reading data from sensor and generating time data with numpy
ydata = task.read(number_of_samples_per_channel=samples_to_acq)
xdata = np.linspace(0, wait_time,samples_to_acq)
trace_1 = go.Scatter(
x = list(xdata),
y = list(ydata)
)
layout = go.Layout(title = 'Oscilograma')
fig = go.Figure(data = [trace_1], layout = layout)
n_clicks = 0
return (fig)
else:
raise PreventUpdate
if __name__ == '__main__':
app.run_server(debug = False, port = 3040)
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