Read data from a remote sensor

mohammad sadegh M

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Dec 20, 2018, 11:16:05 PM12/20/18

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Hi friends. Thank you if my English is not good
The same amount was written by Google Translator
I want to write a program with the appinventor that I can write a remote sensor to the local server or the Internet. Of course, I managed to write the relay control program (which is the area where the information is sent) but I have problems accessing the data. I would love if I can help do.

Chris Ward

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Dec 21, 2018, 3:03:07 AM12/21/18

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Hi Mohammad

To help you, there is a lot of information we need to see.

Since you already have a relay control program (in App Inventor?), sounds like you have made good progress.

Questions about your setup and what we need to see:

A schematic/drawing of the hardware layout
Exact Make/Model of the Relay Board
Are you using a Microprocessor (e.g. Arduino)? If so Exact Make/Model
Exact Make/Model of other hardware (such as a WiFi board)
If using a Microprocessor, we need to see the Script/Sketch
Your App Inventor Project File

You will find a lot of useful links on my website:

https://www.professorcad.co.uk/appinventortips#TipsMicrocontroller Arduino, other Microcontrollers and Related Subjects

mohammad sadegh M

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Dec 21, 2018, 5:32:28 AM12/21/18

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Hi Chris Part
Thank you for taking the time for me and thank you for your kind help.
The hardware I use is nodemcu or one of the ESP8266 modules, which in some cases is also using Arduino.
And I've added a program that I designed to control the relay with the appinventor

MIT App Inventor.htm

mohammad sadegh M

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Dec 21, 2018, 5:36:45 AM12/21/18

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This is the image of the program I designed

control_relay1.png

Ghica

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Dec 21, 2018, 7:50:36 AM12/21/18

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If you want to post your app inventor app, you have to export it as .aia (click on the projects drop down, choose export project to my computer), and upload that.

The htm file is totally useless.

You need a When Web1.GotText event block and your result will be in the responseContent variable.

If you receive a response that is different from what you thought it should be, then the way to debug this is to open a browser on your PC, and type http://YOUR URL/gpio/0 or http://YOUR URL/gpio/1 and see what happens.

Post your results here if you still have problems.

Cheers, Ghica.

mohammad sadegh M

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Dec 22, 2018, 3:48:00 AM12/22/18

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Hello ghica
Thank you first for your reply.
I've attached the file to you. Of course, this file does not have anything to do with the project I want to design. However, I can relate to it.
What is the block that you have introduced how it works.
Have a small and small project in this area?

Control_led.aia