Esp32 returned sensor value as xml , how to parse

[davidMartin]

Returned from esp32 dev module, ultrasonic,ldr and a few switches.
300.0
<SONIC_THRESHOLD>82</SONIC_THRESHOLD>
30.0
1
0
0
0

I have a ESP32 dev retuning sensor values , above is whats returned. I have it displaying as a web page and works fine . New to mit app inventor and want to build an app just to look at ultrasonic value and compare with ultrasonic threshold value from a slider . B1 is the ultrasonic actual value. Started simple and got this to work for a switch. Lable changes when switch is turned on. But dont know ho to parse the xml to get both actual and sonic slider value.
any help appreciated.
David

[davidMartin]

below is the Generated XML: (editted to show markup - ABG)

<Data>

<B0>0</B0>

<V0>0.0</V0>

<B1>300.0</B1>

<V1>30.0</V1>

<LED>1</LED>

<SWITCH>0</SWITCH>

<PIR>0</PIR>

<ALARM>0</ALARM>

<BUZZER>0</BUZZER>

<SONIC_THRESHOLD>82</SONIC_THRESHOLD></Data>

Generated XML:

Data missing in the original.

[davidMartin]

Sorry for all the info, but when i copy and paste from serial, looks ok but missing info when i send.

300 actual reading
<SONIC_THRESHOLD>82</SONIC_THRESHOLD> slider value

[ABG]

(Canned Reply: ABG- Export & Upload .aia)
Export your .aia file and upload it here.

.

..

[davidMartin]

esp32_data.aia (2.9 KB)
looked at a number of tutorials but can not find a good one that uses wifi and sensor values.
got a label to change color on a button state changing. but cant seem to find a good tutorial on parsing xml sensor values from a returned xml file.

[ABG]

I looked at your blocks, hoping to find a responseContent provider I could call on.

You are trying to get a response from 192.168.1.1, a typical home router address local only to you.

You are allowed only one event block of a particular type per component.
(Notice the red X's?)

Prove to us that you are indeed receiving XML.

Show us what arrives in your responseContent (if anything).

[ABG]

I apologize, somehow you received XML but the board hid it in your post.
Add ``` between lines exposed it.

The Web XML parser returned an unusual structure when fed your XML:

I can't explain where all that duplication came from.
(Getting 'Data' wrong ('DATA') didn't help)

This is a less buggy decode block for your XML:

This works better:

xml_parse.aia (2.9 KB)

[davidMartin]

I built a sensors display on an esp32 it acts as a local server. I can connect through a regular html and interact with it it works perfectly. My idea is to take it to the next level. Create an app add count down timer, graphically display data, so I am working on learning a few different things, hopefully I can build individual apps and then integrate all together as the final app, plenty good tutorial on timers , but have struggled to get a good tutorial on sensors, some use jason some lists some , bit confused as how to get the readings, I think once I understand ho to get one value then I can push on and build a good interactive app . Just a bit of background the initial post was a bit rushed and confusing,
My apologies
David

[ABG]

Adjust my sample xml text block to include that <?xml version header and see if my parse code still works.

[ABG]

Or just feed the response content directly to the web XML decode block and lookup in pairs that worked on your sample.

[davidMartin]

Thanks for the quick response