How to use webclient in Berry on Tasmota with ESP32 (S3)?

[hagenbuch]

Hi there,

I'm running a bit into a pickle here:

I've compiled my own Tasmota via Tasmocompiler and I've selected Berry scripting and added

#define USE_WEBCLIENT

and will use

#define USE_WEBCLIENT_HTTPS

later.

While Berry works fine,

import webclient

fails.

I am using WebSend with Rules but I'd like to transfer more than one variable via a simple GET request so I figure it should be possible to use Webclient from within Berry. What did I miss?

Thanks
Andreas

[valdus2]

You don't use any import webclient . It's a class.
Only var cl = webclient() etc.
webclient class

[hagenbuch]

Great, that helped, thanks! However, when I use this code, I always get a return code of -1_

cl = webclient()
cl.begin("http://receiver.dellekom.de/testfile")
r = cl.GET()
print("webclient return")
print(r)
print("webclient response")
s = cl.get_string()
print(s)
cl.close()

Also, where would I put the get parameters, like

?var1=123&var2=567 

?

[sfromis]

Currently, there can be an issue with DNS resolution, in case of you using a static IP for Tasmota instead of getting one via DHCP. Hopefully, this will be fixed within about a week. In case of this hitting you, using DHCP to have the standard DNS resolution should work, or temporarily revert to version 14.5.0. Or use the IP address directly, if feasible.

Adding parameters to the URL is just like when you use it other places, including in a browser. For context, it is not "get parameters", but a query string in the URL.

[sfromis]

Looks like the issue with DNS servers is fixed now with latest dev. #23426

[valdus2]

Giving you an example, writing to MySql with (too) many parameters.

def mysql(value, trigger, payload)

    var wifi = tasmota.wifi()
    var sensors=json.load(tasmota.read_sensors())

    var m1 = "EIGHTREE" 
    var m2 = "Eightree1" 
    var ip = str(wifi.find("ip")) 
    var s_type = "Energy" 
    var s_total = str(sensors['ENERGY']['Total']) 
    var s_yesterday = str(sensors['ENERGY']['Yesterday']) 
    var s_today = str(sensors['ENERGY']['Today']) 
    var s_V = str(sensors['ENERGY']['Voltage']) 
    var s_W = str(sensors['ENERGY']['Power']) 
    var s_VA = str(sensors['ENERGY']['ApparentPower']) 
    var s_Amp = str(sensors['ENERGY']['Current']) 
    var wc = webclient()
    var url = "http://192.168.0.5/sensors.asp?m1=" + m1 + "&m2=" + m2 + "&ip=" + ip + "&s_type=" + s_type + "&s_total=" + s_total + "&s_yesterday=" + s_yesterday + "&s_today=" + s_today + "&s_V=" + s_V + "&s_W=" + s_W + "&s_VA=" + s_VA + "&s_Amp=" + s_Amp; 
    wc.begin(url) 
    var status = wc.GET()
    var response = wc.get_string()
    wc.close()

end

The page reads the vars and writes them in an insert in mysql.
(You could also made it post.)

[sfromis]

Unrelated tip, same URL with shorter coding, f-strings:
var url = f"http://192.168.0.5/sensors.asp?{m1=}&{m2=}&{ip=}&{s_type=}&{s_total=}&{s_yesterday=}&{s_today=}&{s_V=}&{s_W=}&{s_VA=}&{s_Amp=}"
Then you can also remove those str() function calls when getting values.

[hagenbuch]

Thnaks a lot, @valdus2 and @sfromis - that was both very helpful! I'll try to reach an IP in place of a hostname and will wait patiently and happily for the events to come!

[hagenbuch]

GET works now, great!

Where would I put the POST data before calling wc.POST() - do I provide them as arguments?

[sfromis]

The docs for webclient does explain the calls, including the payload argument when doing POST.