NTU Final year project

[HarrisNTU]

Hi Harris here ..... Having trouble to run the app for gas sensors. Get the error message shows below. Need your help to resolve this issue as the sensors are planned for testing with balloon.

[mitchellkok]

npm start still works for me from */dashboard2/frontend

[HarrisNTU]

Hi Mitchell, Manage to compile successfully but the dashboard does not show anything (refer to picture below). By the way what the “npm” version you are using ?. ***@***.*** ***@***.*** Regards, Harris Limasi From: Mitchell Kok ***@***.***> Sent: Wednesday, 13 September 2023 11:58 am To: mitchellkok/RE4001-Renaissance-Capstone-Project ***@***.***> Cc: Harris Limasi ***@***.***>; Author ***@***.***> Subject: Re: [mitchellkok/RE4001-Renaissance-Capstone-Project] NTU Final year project (Issue #1) [Alert: Non-NTU Email] Be cautious before clicking any link or attachment. [image]<https://user-images.githubusercontent.com/67910672/267531033-2257e7d5-26ca-4daf-ae9a-a0f9fcf1b5be.png> npm start still works for me from */dashboard2/frontend — Reply to this email directly, view it on GitHub<#1 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BCN7PJYWXIX267D53UZG7ATX2EVNVANCNFSM6AAAAAA4QEDFTA>. You are receiving this because you authored the thread.Message ID: ***@***.******@***.***>>

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[mitchellkok]

Hi Harris, sorry I don't see any picture in your comment.
I'm using NPM version 9.5.0

[HarrisNTU]

here are the images

[mitchellkok]

It displays "Loading" until it receives a packet from the base station. You'll have to connect the PC to the base station via wifi.

[HarrisNTU]

• the two wires from rechargable battery are connected to the modules

• 9V battery also connected

• Yellow light is blinking

• Laptop choose wifi network to ESP Basestation

• The base station blue light is blinking

• The dashboard still blank .showing loading message.

Any advise ?

[HarrisNTU]

Hi Mitchell, Still the same … any other advise ? From: Mitchell Kok ***@***.***> Sent: Thursday, 14 September 2023 9:49 am To: mitchellkok/RE4001-Renaissance-Capstone-Project ***@***.***> Cc: Harris Limasi ***@***.***>; State change ***@***.***> Subject: Re: [mitchellkok/RE4001-Renaissance-Capstone-Project] NTU Final year project (Issue #1) [Alert: Non-NTU Email] Be cautious before clicking any link or attachment. It displays "Loading" until it receives a packet from the base station. You'll have to connect the PC to the base station via wifi. — Reply to this email directly, view it on GitHub<#1 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BCN7PJ35XORU4UXAIKEFQTLX2JO77ANCNFSM6AAAAAA4QEDFTA>. You are receiving this because you modified the open/close state.Message ID: ***@***.***>

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________________________________ CONFIDENTIALITY: This email is intended solely for the person(s) named and may be confidential and/or privileged. If you are not the intended recipient, please delete it, notify us and do not copy, use, or disclose its contents. Towards a sustainable earth: Print only when necessary. Thank you.

[mitchellkok]

Perhaps check that the IP address "esp32_address" in laptop2.py matches the Base station's IP address?

[HarrisNTU]

IP addresses are checked, both esp32 address and base station are matched. Base station blue ELD is blinking but the dashboard still showing "loading message ..."

[HarrisNTU]

Hi Mitchell, Can I call you ? From: Mitchell Kok ***@***.***> Sent: Thursday, 14 September 2023 9:49 am To: mitchellkok/RE4001-Renaissance-Capstone-Project ***@***.***> Cc: Harris Limasi ***@***.***>; State change ***@***.***> Subject: Re: [mitchellkok/RE4001-Renaissance-Capstone-Project] NTU Final year project (Issue #1) [Alert: Non-NTU Email] Be cautious before clicking any link or attachment. It displays "Loading" until it receives a packet from the base station. You'll have to connect the PC to the base station via wifi. — Reply to this email directly, view it on GitHub<#1 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/BCN7PJ35XORU4UXAIKEFQTLX2JO77ANCNFSM6AAAAAA4QEDFTA>. You are receiving this because you modified the open/close state.Message ID: ***@***.***>

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________________________________ CONFIDENTIALITY: This email is intended solely for the person(s) named and may be confidential and/or privileged. If you are not the intended recipient, please delete it, notify us and do not copy, use, or disclose its contents. Towards a sustainable earth: Print only when necessary. Thank you.

[HarrisNTU]

PC connected to the base station via wifi already but still has the blank dashboard screen

[mitchellkok]

Strange - if the PC is connected to the base station, it should be displaying the dashboard fields with "--".
If the blue LED on the base station is blinking, it should be receiving data from the payload and sending it to the Flask server.

Any output from the Flask terminal?

[HarrisNTU]

output from Flask terminal ... however the dashboard still not showing anything (blank screen)

[mitchellkok]

Interesting. Could you check that the port in fetch.js matches the Flask port? Also provide the JS console output for the dashboard if there is anything

[HarrisNTU]

Fetch.js Port number

For JS console output, not sure how to get it. How to get it from visual studio code ?, Can you gives step-by-step instructions ?

[mitchellkok]

You can get the JS console output from the browser inspect functionality (right-click inspect, or fn-f12).
You should be able to see the packets received in this console, if any.

[HarrisNTU]

Hi Michell ... this is what we get

[mitchellkok]

Looks like the React frontend can't connect to the Flask backend.
Can I check what version of Flask you're using? I saw that some methods have been deprecated

[HarrisNTU]

Flask version is 2.2.2

[HarrisNTU]

Hi Mitchell,

The software have the same problem again (blank secreen) ... could you tell me the steps you to fix the issue last time ?. Thanks.