将 dash 应用程序部署到 heroku 时出错，Nidaqmx.lib.DaqNotFoundError
Error when deployin a dash app to heroku, Nidaqmx.lib.DaqNotFoundError
我正在尝试使用 NI9234 从加速度计远程读取数据。我在 windows 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东西。我认为部署工作正常，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
我不知道哪个部分重要，但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 运行 遇到过这个问题。
在很多天没有得到答复后，我将 post 考虑我认为正在发生的事情，并且 post 一个不涉及 heroku 的可行解决方案。
我的理论：
python 中的 nidaqmx 库需要 National Instruments 的 download。如果你没有它，那么它就不会工作。安装仅适用于 windows。我猜 Heroku 的服务器没有这些文件。
在Heroku之后，我尝试运行我的程序在pythonanywhere，甚至用过Docker； none 这些方法都有效（也许我做错了什么，或者从上面看可能是同样的问题）
经过多天的阅读资料、搜索网络并尝试不同的方法，我找到了一个简单易行的解决方案； ngrok.
基本上你只需要 register, download the zip, unzip it and paste the ngrok.exe in C:/Windows/system32. Add the path to your env variables（检查 il0v3d0g 的答案），然后 运行 你在本地服务器（例如端口 3040）中的 dash 应用程序，最后 运行另一个 windows bash cmd
中的 ngrok 命令
ngrok http 3040
这将在您的本地主机（即 运行 连接您的 dash 应用程序）和互联网上任何其他具有 ngrok 创建的转发地址的任何其他计算机之间创建一个“隧道”。
这是我的“设置”的粗略示意图
如果有人想知道 dash 应用程序是什么样子，我也会添加它（以防像我这样的工程师陷入处理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)
我正在尝试使用 NI9234 从加速度计远程读取数据。我在 windows 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东西。我认为部署工作正常，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
我不知道哪个部分重要，但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 运行 遇到过这个问题。
在很多天没有得到答复后，我将 post 考虑我认为正在发生的事情，并且 post 一个不涉及 heroku 的可行解决方案。
我的理论： python 中的 nidaqmx 库需要 National Instruments 的 download。如果你没有它，那么它就不会工作。安装仅适用于 windows。我猜 Heroku 的服务器没有这些文件。
在Heroku之后，我尝试运行我的程序在pythonanywhere，甚至用过Docker； none 这些方法都有效（也许我做错了什么，或者从上面看可能是同样的问题）
经过多天的阅读资料、搜索网络并尝试不同的方法，我找到了一个简单易行的解决方案； ngrok.
基本上你只需要 register, download the zip, unzip it and paste the ngrok.exe in C:/Windows/system32. Add the path to your env variables（检查 il0v3d0g 的答案），然后 运行 你在本地服务器（例如端口 3040）中的 dash 应用程序，最后 运行另一个 windows bash cmd
中的 ngrok 命令ngrok http 3040
这将在您的本地主机（即 运行 连接您的 dash 应用程序）和互联网上任何其他具有 ngrok 创建的转发地址的任何其他计算机之间创建一个“隧道”。
这是我的“设置”的粗略示意图
如果有人想知道 dash 应用程序是什么样子，我也会添加它（以防像我这样的工程师陷入处理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)