Arduino-esp32: send multiple variables using one http.POST request ESP32

[anandpanchal]

Hardware:

Board: ESP32 Dev Module
Core Installation/update date: 2018
IDE name: Arduino IDE
Flash Frequency: 80Mhz
PSRAM enabled: no
Upload Speed: 115200
Computer OS: Windows 7

Description:

Hello Everyone,

i'm trying to send(POST) multiple(2or3) variables using http.POST , e.g http.POST(variable1,variable2) something like this, but unable to do so. can anyone please help me in doing this ?

Thanks
Anand

[chegewara]

You can pass one long string which is in form of:

grant_type=refresh_token&client_id=amzn1.application-oa2-client&refresh_token=Atzr%7CIwEBID5spY2iwIvtUw5sBKwzHSML

But you have to set header:
Content-Type: application/x-www-form-urlencoded

[anandpanchal]

@chegewara

http.addHeader("Content-Type", "application/x-www-form-urlencoded");
httpResponseCode = http.POST(date=dayStamp&timeis=timeStamp);
format of dayStamp = 08:09:2018
timeStamp = 12:14:34

error message : no match for 'operator&' (operand types are 'String' and 'String')

[chegewara]

httpResponseCode = http.POST("date=dayStamp&timeis=timeStamp");

[anandpanchal]

i am getting this on server side. but i want something like 08:11:2018 12:23:45
so that i can ,after processing the data, extract the variables

[chegewara]

I understand, i just gave you example how to fix that error. Now you have to build string before you pass it as argument. Something like that:

char _post[40];
sprintf(_post, "date=%s&timeis=%s", dayStamp, timeStamp);
httpResponseCode = http.POST(_post);

Just check how to convert dayStamp and timeStamp to string (google it).

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This stale issue has been automatically closed. Thank you for your contributions.

[mehrdad987]

hey
Is there any restriction on sending data?
I mean I am sending a file content as one string and after 210 lines it couldn't send
whats a problem?